/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/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-17 02:35:19,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-17 02:35:19,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-17 02:35:19,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-17 02:35:19,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-17 02:35:19,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-17 02:35:19,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-17 02:35:19,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-17 02:35:19,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-17 02:35:19,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-17 02:35:19,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-17 02:35:19,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-17 02:35:19,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-17 02:35:19,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-17 02:35:19,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-17 02:35:19,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-17 02:35:19,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-17 02:35:19,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-17 02:35:19,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-17 02:35:19,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-17 02:35:19,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-17 02:35:19,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-17 02:35:19,415 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-17 02:35:19,416 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-17 02:35:19,419 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-17 02:35:19,424 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-17 02:35:19,425 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-17 02:35:19,426 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-17 02:35:19,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-17 02:35:19,429 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-17 02:35:19,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-17 02:35:19,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-17 02:35:19,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-17 02:35:19,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-17 02:35:19,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-17 02:35:19,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-17 02:35:19,435 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-17 02:35:19,466 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-17 02:35:19,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-17 02:35:19,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-17 02:35:19,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-17 02:35:19,469 INFO L138 SettingsManager]: * Use SBE=true [2020-09-17 02:35:19,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-17 02:35:19,470 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-17 02:35:19,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-17 02:35:19,470 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-17 02:35:19,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-17 02:35:19,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-17 02:35:19,471 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-17 02:35:19,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-17 02:35:19,471 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-17 02:35:19,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-17 02:35:19,472 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-17 02:35:19,472 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-17 02:35:19,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-17 02:35:19,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-17 02:35:19,473 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-17 02:35:19,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-17 02:35:19,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 02:35:19,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-17 02:35:19,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-17 02:35:19,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-17 02:35:19,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-17 02:35:19,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-17 02:35:19,475 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-17 02:35:19,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-17 02:35:20,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-17 02:35:20,114 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-17 02:35:20,126 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-17 02:35:20,130 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-17 02:35:20,131 INFO L275 PluginConnector]: CDTParser initialized [2020-09-17 02:35:20,133 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-09-17 02:35:20,268 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88883a773/fbdfae0b13ec4ca99b315e36bbb149d7/FLAGfc312e4b1 [2020-09-17 02:35:21,401 INFO L306 CDTParser]: Found 1 translation units. [2020-09-17 02:35:21,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-09-17 02:35:21,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88883a773/fbdfae0b13ec4ca99b315e36bbb149d7/FLAGfc312e4b1 [2020-09-17 02:35:21,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88883a773/fbdfae0b13ec4ca99b315e36bbb149d7 [2020-09-17 02:35:21,514 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-17 02:35:21,524 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-17 02:35:21,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-17 02:35:21,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-17 02:35:21,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-17 02:35:21,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:35:21" (1/1) ... [2020-09-17 02:35:21,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7de4a2bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:21, skipping insertion in model container [2020-09-17 02:35:21,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:35:21" (1/1) ... [2020-09-17 02:35:21,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-17 02:35:21,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-17 02:35:22,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 02:35:22,489 INFO L203 MainTranslator]: Completed pre-run [2020-09-17 02:35:22,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 02:35:22,686 INFO L208 MainTranslator]: Completed translation [2020-09-17 02:35:22,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:22 WrapperNode [2020-09-17 02:35:22,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-17 02:35:22,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-17 02:35:22,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-17 02:35:22,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-17 02:35:22,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:22" (1/1) ... [2020-09-17 02:35:22,736 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:22" (1/1) ... [2020-09-17 02:35:22,776 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-17 02:35:22,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-17 02:35:22,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-17 02:35:22,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-17 02:35:22,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:22" (1/1) ... [2020-09-17 02:35:22,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:22" (1/1) ... [2020-09-17 02:35:22,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:22" (1/1) ... [2020-09-17 02:35:22,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:22" (1/1) ... [2020-09-17 02:35:22,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:22" (1/1) ... [2020-09-17 02:35:22,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:22" (1/1) ... [2020-09-17 02:35:22,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:22" (1/1) ... [2020-09-17 02:35:22,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-17 02:35:22,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-17 02:35:22,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-17 02:35:22,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-17 02:35:22,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:22" (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 [2020-09-17 02:35:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-17 02:35:22,949 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-17 02:35:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-17 02:35:22,950 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-17 02:35:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-17 02:35:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-17 02:35:22,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-17 02:35:22,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-17 02:35:22,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-17 02:35:22,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-17 02:35:22,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-17 02:35:22,956 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-17 02:35:23,543 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-17 02:35:23,543 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-17 02:35:23,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:35:23 BoogieIcfgContainer [2020-09-17 02:35:23,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-17 02:35:23,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-17 02:35:23,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-17 02:35:23,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-17 02:35:23,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 02:35:21" (1/3) ... [2020-09-17 02:35:23,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e56163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:35:23, skipping insertion in model container [2020-09-17 02:35:23,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:22" (2/3) ... [2020-09-17 02:35:23,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e56163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:35:23, skipping insertion in model container [2020-09-17 02:35:23,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:35:23" (3/3) ... [2020-09-17 02:35:23,566 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2020-09-17 02:35:23,586 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-17 02:35:23,587 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-17 02:35:23,602 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-17 02:35:23,604 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-17 02:35:23,636 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,637 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,637 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,637 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,638 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,638 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,639 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,639 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,639 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,640 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,640 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,640 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,641 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,641 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,641 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,642 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,642 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,642 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,642 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,643 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,643 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,643 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,644 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,644 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,644 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,645 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,645 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,645 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,650 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,651 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,651 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,651 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,651 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,652 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,660 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,660 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,661 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,661 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,661 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,662 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:23,686 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-17 02:35:23,711 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-17 02:35:23,712 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-17 02:35:23,712 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-17 02:35:23,712 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-17 02:35:23,712 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-17 02:35:23,713 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-17 02:35:23,713 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-17 02:35:23,713 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-17 02:35:23,731 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-17 02:35:23,733 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-17 02:35:23,778 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-17 02:35:23,779 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 02:35:23,786 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-17 02:35:23,789 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-17 02:35:23,809 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-17 02:35:23,809 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 02:35:23,810 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-17 02:35:23,813 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-17 02:35:23,814 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-17 02:35:25,132 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-17 02:35:25,355 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-17 02:35:25,356 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-17 02:35:25,361 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-17 02:35:25,376 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-17 02:35:25,379 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-17 02:35:25,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-17 02:35:25,389 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:25,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-17 02:35:25,390 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:25,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:25,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-17 02:35:25,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:25,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140667685] [2020-09-17 02:35:25,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:25,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140667685] [2020-09-17 02:35:25,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:35:25,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-17 02:35:25,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954841163] [2020-09-17 02:35:25,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-17 02:35:25,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:25,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-17 02:35:25,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-17 02:35:25,698 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-17 02:35:25,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:25,808 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-17 02:35:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-17 02:35:25,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-17 02:35:25,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:25,831 INFO L225 Difference]: With dead ends: 75 [2020-09-17 02:35:25,831 INFO L226 Difference]: Without dead ends: 42 [2020-09-17 02:35:25,833 INFO L675 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 [2020-09-17 02:35:25,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-17 02:35:25,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-17 02:35:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 02:35:25,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-17 02:35:25,881 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-17 02:35:25,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:25,882 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-17 02:35:25,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-17 02:35:25,882 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-17 02:35:25,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-17 02:35:25,883 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:25,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:25,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-17 02:35:25,884 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:25,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:25,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-17 02:35:25,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:25,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967594728] [2020-09-17 02:35:25,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:25,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967594728] [2020-09-17 02:35:25,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:35:25,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 02:35:25,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481174012] [2020-09-17 02:35:25,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-17 02:35:25,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:25,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-17 02:35:25,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-17 02:35:25,982 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-17 02:35:26,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:26,021 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-17 02:35:26,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-17 02:35:26,022 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-17 02:35:26,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:26,023 INFO L225 Difference]: With dead ends: 56 [2020-09-17 02:35:26,024 INFO L226 Difference]: Without dead ends: 50 [2020-09-17 02:35:26,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:35:26,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-17 02:35:26,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-17 02:35:26,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 02:35:26,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-17 02:35:26,034 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-17 02:35:26,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:26,035 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-17 02:35:26,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-17 02:35:26,036 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-17 02:35:26,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:35:26,037 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:26,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:26,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-17 02:35:26,037 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:26,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:26,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-17 02:35:26,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:26,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127962770] [2020-09-17 02:35:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:26,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127962770] [2020-09-17 02:35:26,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:35:26,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 02:35:26,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934972170] [2020-09-17 02:35:26,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 02:35:26,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:26,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 02:35:26,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:35:26,132 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-17 02:35:26,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:26,222 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-17 02:35:26,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:35:26,223 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-17 02:35:26,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:26,224 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:35:26,225 INFO L226 Difference]: Without dead ends: 71 [2020-09-17 02:35:26,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:35:26,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-17 02:35:26,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-17 02:35:26,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:35:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-17 02:35:26,235 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-17 02:35:26,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:26,236 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-17 02:35:26,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 02:35:26,236 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-17 02:35:26,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:35:26,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:26,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:26,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-17 02:35:26,238 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:26,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:26,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-17 02:35:26,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:26,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720372711] [2020-09-17 02:35:26,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:26,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720372711] [2020-09-17 02:35:26,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:35:26,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 02:35:26,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898316544] [2020-09-17 02:35:26,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 02:35:26,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:26,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 02:35:26,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:35:26,373 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-17 02:35:26,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:26,468 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-17 02:35:26,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 02:35:26,469 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-17 02:35:26,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:26,470 INFO L225 Difference]: With dead ends: 54 [2020-09-17 02:35:26,470 INFO L226 Difference]: Without dead ends: 43 [2020-09-17 02:35:26,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:35:26,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-17 02:35:26,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-17 02:35:26,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-17 02:35:26,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-17 02:35:26,476 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-17 02:35:26,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:26,477 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-17 02:35:26,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 02:35:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-17 02:35:26,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:35:26,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:26,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:26,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-17 02:35:26,479 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:26,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:26,479 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-17 02:35:26,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:26,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749679166] [2020-09-17 02:35:26,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:26,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749679166] [2020-09-17 02:35:26,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:35:26,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 02:35:26,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100634890] [2020-09-17 02:35:26,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 02:35:26,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:26,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 02:35:26,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:35:26,586 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-17 02:35:26,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:26,680 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-17 02:35:26,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 02:35:26,681 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-17 02:35:26,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:26,682 INFO L225 Difference]: With dead ends: 57 [2020-09-17 02:35:26,682 INFO L226 Difference]: Without dead ends: 51 [2020-09-17 02:35:26,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:35:26,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-17 02:35:26,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-17 02:35:26,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-17 02:35:26,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-17 02:35:26,697 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-17 02:35:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:26,697 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-17 02:35:26,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 02:35:26,698 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-17 02:35:26,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:35:26,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:26,699 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:26,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-17 02:35:26,699 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:26,700 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-17 02:35:26,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:26,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744584042] [2020-09-17 02:35:26,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:26,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:26,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744584042] [2020-09-17 02:35:26,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110262658] [2020-09-17 02:35:26,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:26,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:26,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:26,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:35:26,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:26,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:35:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:26,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:26,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-17 02:35:26,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134517797] [2020-09-17 02:35:26,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:35:26,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:26,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:35:26,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:35:26,936 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-17 02:35:27,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:27,059 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-17 02:35:27,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:35:27,059 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 02:35:27,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:27,060 INFO L225 Difference]: With dead ends: 48 [2020-09-17 02:35:27,060 INFO L226 Difference]: Without dead ends: 43 [2020-09-17 02:35:27,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:27,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-17 02:35:27,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-17 02:35:27,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-17 02:35:27,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-17 02:35:27,069 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-17 02:35:27,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:27,070 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-17 02:35:27,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:35:27,070 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-17 02:35:27,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:35:27,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:27,071 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:27,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-17 02:35:27,273 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:27,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:27,274 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-17 02:35:27,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:27,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364603096] [2020-09-17 02:35:27,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:27,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364603096] [2020-09-17 02:35:27,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047852412] [2020-09-17 02:35:27,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:27,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:27,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:27,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:35:27,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:27,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:27,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-17 02:35:27,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248392988] [2020-09-17 02:35:27,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-17 02:35:27,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:27,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-17 02:35:27,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-17 02:35:27,491 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-17 02:35:27,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:27,586 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-17 02:35:27,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:35:27,587 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-17 02:35:27,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:27,588 INFO L225 Difference]: With dead ends: 54 [2020-09-17 02:35:27,588 INFO L226 Difference]: Without dead ends: 48 [2020-09-17 02:35:27,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:35:27,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-17 02:35:27,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-17 02:35:27,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 02:35:27,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-17 02:35:27,594 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-17 02:35:27,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:27,595 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-17 02:35:27,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-17 02:35:27,595 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-17 02:35:27,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:35:27,596 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:27,596 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:27,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:27,807 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:27,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:27,808 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-17 02:35:27,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:27,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134088206] [2020-09-17 02:35:27,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:27,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134088206] [2020-09-17 02:35:27,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29513092] [2020-09-17 02:35:27,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:27,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:35:27,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:27,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:35:27,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:28,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:28,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:28,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-17 02:35:28,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409697509] [2020-09-17 02:35:28,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:35:28,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:28,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:35:28,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:35:28,021 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-17 02:35:28,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:28,133 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-17 02:35:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:35:28,134 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 02:35:28,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:28,134 INFO L225 Difference]: With dead ends: 58 [2020-09-17 02:35:28,135 INFO L226 Difference]: Without dead ends: 52 [2020-09-17 02:35:28,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:28,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-17 02:35:28,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-17 02:35:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-17 02:35:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-17 02:35:28,140 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-17 02:35:28,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:28,141 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-17 02:35:28,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:35:28,141 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-17 02:35:28,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:35:28,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:28,142 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:28,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:28,355 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:28,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:28,355 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-17 02:35:28,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:28,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639461267] [2020-09-17 02:35:28,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:28,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639461267] [2020-09-17 02:35:28,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709992542] [2020-09-17 02:35:28,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:28,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:35:28,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:28,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:28,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-17 02:35:28,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008349836] [2020-09-17 02:35:28,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-17 02:35:28,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:28,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-17 02:35:28,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-17 02:35:28,502 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-17 02:35:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:28,677 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-17 02:35:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:35:28,678 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-17 02:35:28,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:28,679 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:35:28,679 INFO L226 Difference]: Without dead ends: 72 [2020-09-17 02:35:28,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-17 02:35:28,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-17 02:35:28,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:35:28,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-17 02:35:28,686 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-17 02:35:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:28,687 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-17 02:35:28,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-17 02:35:28,687 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-17 02:35:28,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:35:28,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:28,688 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:28,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:28,903 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:28,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:28,903 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-17 02:35:28,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:28,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007585487] [2020-09-17 02:35:28,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:28,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007585487] [2020-09-17 02:35:28,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757017607] [2020-09-17 02:35:28,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:29,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:29,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:29,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:35:29,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:29,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:29,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-17 02:35:29,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951152735] [2020-09-17 02:35:29,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:35:29,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:29,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:35:29,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:35:29,070 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-17 02:35:29,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:29,273 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-17 02:35:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:35:29,274 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 02:35:29,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:29,275 INFO L225 Difference]: With dead ends: 62 [2020-09-17 02:35:29,275 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 02:35:29,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:35:29,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 02:35:29,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-17 02:35:29,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-17 02:35:29,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-17 02:35:29,283 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-17 02:35:29,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:29,284 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-17 02:35:29,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:35:29,284 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-17 02:35:29,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:35:29,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:29,286 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:29,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-17 02:35:29,498 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:29,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:29,499 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-17 02:35:29,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:29,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702417738] [2020-09-17 02:35:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:29,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702417738] [2020-09-17 02:35:29,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551824444] [2020-09-17 02:35:29,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:29,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:35:29,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:29,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:35:29,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:29,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:29,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-17 02:35:29,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776507517] [2020-09-17 02:35:29,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:35:29,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:29,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:35:29,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:35:29,703 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-17 02:35:29,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:29,829 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-17 02:35:29,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:35:29,829 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-17 02:35:29,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:29,831 INFO L225 Difference]: With dead ends: 64 [2020-09-17 02:35:29,831 INFO L226 Difference]: Without dead ends: 58 [2020-09-17 02:35:29,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-17 02:35:29,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-17 02:35:29,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-17 02:35:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-17 02:35:29,837 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-17 02:35:29,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:29,837 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-17 02:35:29,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:35:29,837 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-17 02:35:29,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:35:29,838 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:29,838 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:30,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:30,053 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:30,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:30,054 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-17 02:35:30,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:30,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901097048] [2020-09-17 02:35:30,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:30,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901097048] [2020-09-17 02:35:30,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313691906] [2020-09-17 02:35:30,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:30,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:30,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:30,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:35:30,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:30,214 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:30,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:30,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-17 02:35:30,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548048229] [2020-09-17 02:35:30,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:35:30,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:30,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:35:30,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:35:30,235 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-17 02:35:30,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:30,430 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-17 02:35:30,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:35:30,431 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 02:35:30,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:30,432 INFO L225 Difference]: With dead ends: 61 [2020-09-17 02:35:30,432 INFO L226 Difference]: Without dead ends: 55 [2020-09-17 02:35:30,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:35:30,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-17 02:35:30,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-17 02:35:30,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-17 02:35:30,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-17 02:35:30,436 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-17 02:35:30,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:30,437 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-17 02:35:30,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:35:30,437 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-17 02:35:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:35:30,438 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:30,438 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:30,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:30,648 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:30,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:30,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-17 02:35:30,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:30,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229668987] [2020-09-17 02:35:30,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:30,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229668987] [2020-09-17 02:35:30,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842465250] [2020-09-17 02:35:30,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:30,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:30,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:30,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:35:30,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:30,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:30,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-17 02:35:30,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156438626] [2020-09-17 02:35:30,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:35:30,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:30,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:35:30,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:35:30,820 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-17 02:35:30,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:30,989 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-17 02:35:30,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:35:30,990 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-17 02:35:30,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:30,991 INFO L225 Difference]: With dead ends: 77 [2020-09-17 02:35:30,991 INFO L226 Difference]: Without dead ends: 71 [2020-09-17 02:35:30,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:35:30,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-17 02:35:31,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-17 02:35:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-17 02:35:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-17 02:35:31,011 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-17 02:35:31,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:31,012 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-17 02:35:31,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:35:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-17 02:35:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:35:31,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:31,018 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:31,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-17 02:35:31,219 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:31,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:31,220 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-17 02:35:31,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:31,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710064496] [2020-09-17 02:35:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:31,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710064496] [2020-09-17 02:35:31,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796190704] [2020-09-17 02:35:31,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:31,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:35:31,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:31,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:35:31,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:31,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:31,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-17 02:35:31,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942342629] [2020-09-17 02:35:31,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:35:31,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:31,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:35:31,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:35:31,381 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-17 02:35:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:31,629 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-09-17 02:35:31,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:35:31,630 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 02:35:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:31,631 INFO L225 Difference]: With dead ends: 56 [2020-09-17 02:35:31,631 INFO L226 Difference]: Without dead ends: 48 [2020-09-17 02:35:31,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:35:31,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-17 02:35:31,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-09-17 02:35:31,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-17 02:35:31,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-17 02:35:31,638 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-17 02:35:31,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:31,639 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-17 02:35:31,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:35:31,639 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-17 02:35:31,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:35:31,640 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:31,640 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:31,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:31,842 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:31,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:31,843 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-17 02:35:31,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:31,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885835787] [2020-09-17 02:35:31,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:31,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885835787] [2020-09-17 02:35:31,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83482590] [2020-09-17 02:35:31,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:31,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:35:31,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:32,003 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:35:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:32,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:32,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-17 02:35:32,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038428086] [2020-09-17 02:35:32,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:35:32,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:32,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:35:32,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:35:32,020 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-17 02:35:32,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:32,229 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-17 02:35:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:35:32,229 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 02:35:32,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:32,231 INFO L225 Difference]: With dead ends: 60 [2020-09-17 02:35:32,231 INFO L226 Difference]: Without dead ends: 55 [2020-09-17 02:35:32,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:35:32,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-17 02:35:32,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-17 02:35:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:35:32,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-17 02:35:32,236 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-17 02:35:32,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:32,236 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-17 02:35:32,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:35:32,236 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-17 02:35:32,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:35:32,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:32,237 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:32,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-17 02:35:32,450 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:32,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:32,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-17 02:35:32,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:32,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312964174] [2020-09-17 02:35:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:32,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312964174] [2020-09-17 02:35:32,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294047159] [2020-09-17 02:35:32,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:32,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:32,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:32,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:35:32,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:32,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:35:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:32,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:32,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-17 02:35:32,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239750235] [2020-09-17 02:35:32,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:35:32,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:32,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:35:32,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:35:32,633 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-17 02:35:32,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:32,872 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-17 02:35:32,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:35:32,872 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 02:35:32,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:32,874 INFO L225 Difference]: With dead ends: 54 [2020-09-17 02:35:32,874 INFO L226 Difference]: Without dead ends: 49 [2020-09-17 02:35:32,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:32,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-17 02:35:32,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-17 02:35:32,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-17 02:35:32,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-17 02:35:32,879 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-17 02:35:32,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:32,879 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-17 02:35:32,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:35:32,879 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-17 02:35:32,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:35:32,880 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:32,880 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:33,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-17 02:35:33,092 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:33,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:33,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-17 02:35:33,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:33,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474579969] [2020-09-17 02:35:33,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:33,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474579969] [2020-09-17 02:35:33,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855685818] [2020-09-17 02:35:33,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:33,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:35:33,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:33,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:35:33,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:33,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:33,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 02:35:33,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69049444] [2020-09-17 02:35:33,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:35:33,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:33,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:35:33,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:35:33,280 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-17 02:35:33,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:33,391 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-17 02:35:33,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:35:33,392 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-17 02:35:33,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:33,393 INFO L225 Difference]: With dead ends: 60 [2020-09-17 02:35:33,393 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 02:35:33,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:35:33,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 02:35:33,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-17 02:35:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:35:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-17 02:35:33,397 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-17 02:35:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:33,397 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-17 02:35:33,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:35:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-17 02:35:33,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:35:33,398 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:33,398 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:33,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-17 02:35:33,599 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:33,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:33,600 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-17 02:35:33,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:33,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425657134] [2020-09-17 02:35:33,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:33,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425657134] [2020-09-17 02:35:33,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129331110] [2020-09-17 02:35:33,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:33,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:33,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:33,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:35:33,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:33,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:33,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:33,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-17 02:35:33,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629789194] [2020-09-17 02:35:33,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:35:33,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:33,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:35:33,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:35:33,808 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-17 02:35:33,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:33,976 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-17 02:35:33,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:35:33,976 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 02:35:33,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:33,977 INFO L225 Difference]: With dead ends: 66 [2020-09-17 02:35:33,977 INFO L226 Difference]: Without dead ends: 60 [2020-09-17 02:35:33,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:35:33,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-17 02:35:33,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-17 02:35:33,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-17 02:35:33,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-17 02:35:33,980 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-17 02:35:33,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:33,981 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-17 02:35:33,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:35:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-17 02:35:33,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:35:33,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:33,982 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:34,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-17 02:35:34,183 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:34,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:34,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-17 02:35:34,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:34,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719745376] [2020-09-17 02:35:34,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:34,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719745376] [2020-09-17 02:35:34,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720447672] [2020-09-17 02:35:34,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:34,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:35:34,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:34,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:35:34,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:34,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:34,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 02:35:34,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563177465] [2020-09-17 02:35:34,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:35:34,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:34,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:35:34,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:35:34,334 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-17 02:35:34,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:34,506 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-17 02:35:34,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:35:34,507 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-17 02:35:34,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:34,507 INFO L225 Difference]: With dead ends: 67 [2020-09-17 02:35:34,507 INFO L226 Difference]: Without dead ends: 61 [2020-09-17 02:35:34,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:35:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-17 02:35:34,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-17 02:35:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-17 02:35:34,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-17 02:35:34,511 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-17 02:35:34,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:34,511 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-17 02:35:34,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:35:34,511 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-17 02:35:34,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:35:34,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:34,512 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:34,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:34,713 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:34,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:34,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-17 02:35:34,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:34,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676838552] [2020-09-17 02:35:34,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:34,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676838552] [2020-09-17 02:35:34,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791300619] [2020-09-17 02:35:34,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:34,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:35:34,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:34,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:35:34,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:34,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:34,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:34,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-17 02:35:34,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138103412] [2020-09-17 02:35:34,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:35:34,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:34,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:35:34,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:35:34,907 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-17 02:35:35,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:35,148 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-17 02:35:35,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:35:35,149 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 02:35:35,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:35,150 INFO L225 Difference]: With dead ends: 69 [2020-09-17 02:35:35,150 INFO L226 Difference]: Without dead ends: 63 [2020-09-17 02:35:35,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:35,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-17 02:35:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-17 02:35:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:35:35,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-17 02:35:35,154 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-17 02:35:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:35,154 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-17 02:35:35,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:35:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-17 02:35:35,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:35:35,155 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:35,155 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:35,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:35,364 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:35,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:35,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-17 02:35:35,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:35,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323654641] [2020-09-17 02:35:35,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:35,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323654641] [2020-09-17 02:35:35,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321156881] [2020-09-17 02:35:35,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:35,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:35:35,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:35,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:35,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 02:35:35,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868601006] [2020-09-17 02:35:35,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:35:35,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:35,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:35:35,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:35:35,542 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-17 02:35:35,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:35,765 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-17 02:35:35,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:35:35,766 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-17 02:35:35,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:35,769 INFO L225 Difference]: With dead ends: 88 [2020-09-17 02:35:35,769 INFO L226 Difference]: Without dead ends: 82 [2020-09-17 02:35:35,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:35:35,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-17 02:35:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-17 02:35:35,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 02:35:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-17 02:35:35,776 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-17 02:35:35,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:35,776 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-17 02:35:35,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:35:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-17 02:35:35,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:35:35,779 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:35,779 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:35,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:35,981 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:35,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:35,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-17 02:35:35,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:35,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693906927] [2020-09-17 02:35:35,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:36,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693906927] [2020-09-17 02:35:36,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052358781] [2020-09-17 02:35:36,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:36,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:36,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:36,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:35:36,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:36,164 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:36,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:36,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-17 02:35:36,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884259602] [2020-09-17 02:35:36,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:35:36,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:36,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:35:36,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:35:36,178 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-17 02:35:36,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:36,497 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-17 02:35:36,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:35:36,497 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 02:35:36,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:36,498 INFO L225 Difference]: With dead ends: 69 [2020-09-17 02:35:36,499 INFO L226 Difference]: Without dead ends: 61 [2020-09-17 02:35:36,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:35:36,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-17 02:35:36,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-17 02:35:36,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-17 02:35:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-17 02:35:36,504 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-17 02:35:36,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:36,505 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-17 02:35:36,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:35:36,505 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-17 02:35:36,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:35:36,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:36,507 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:36,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-17 02:35:36,708 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:36,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:36,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-17 02:35:36,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:36,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685299098] [2020-09-17 02:35:36,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:36,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685299098] [2020-09-17 02:35:36,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112326151] [2020-09-17 02:35:36,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:36,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:35:36,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:36,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:35:36,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:36,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:36,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 02:35:36,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618478587] [2020-09-17 02:35:36,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:35:36,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:36,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:35:36,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:35:36,891 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-17 02:35:37,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:37,053 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-17 02:35:37,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:35:37,055 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-17 02:35:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:37,056 INFO L225 Difference]: With dead ends: 74 [2020-09-17 02:35:37,056 INFO L226 Difference]: Without dead ends: 68 [2020-09-17 02:35:37,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:35:37,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-17 02:35:37,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-17 02:35:37,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-17 02:35:37,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-17 02:35:37,059 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-17 02:35:37,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:37,061 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-17 02:35:37,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:35:37,062 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-17 02:35:37,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:35:37,062 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:37,062 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:37,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-17 02:35:37,263 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:37,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:37,263 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-17 02:35:37,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:37,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618061246] [2020-09-17 02:35:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:37,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618061246] [2020-09-17 02:35:37,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333584249] [2020-09-17 02:35:37,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:37,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:37,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:37,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:35:37,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:37,470 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:37,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:37,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-17 02:35:37,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150933854] [2020-09-17 02:35:37,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:35:37,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:37,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:35:37,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:35:37,484 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-17 02:35:37,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:37,729 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-17 02:35:37,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:35:37,729 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 02:35:37,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:37,730 INFO L225 Difference]: With dead ends: 71 [2020-09-17 02:35:37,730 INFO L226 Difference]: Without dead ends: 65 [2020-09-17 02:35:37,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:35:37,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-17 02:35:37,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-17 02:35:37,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:35:37,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-17 02:35:37,734 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-17 02:35:37,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:37,734 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-17 02:35:37,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:35:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-17 02:35:37,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:35:37,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:37,735 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:37,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-17 02:35:37,941 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:37,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:37,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-17 02:35:37,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:37,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207518088] [2020-09-17 02:35:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:38,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207518088] [2020-09-17 02:35:38,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837741729] [2020-09-17 02:35:38,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:38,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:35:38,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:38,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:35:38,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:38,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:38,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 02:35:38,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078933389] [2020-09-17 02:35:38,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:35:38,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:38,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:35:38,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:35:38,150 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-17 02:35:38,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:38,376 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-17 02:35:38,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:35:38,377 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-17 02:35:38,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:38,378 INFO L225 Difference]: With dead ends: 68 [2020-09-17 02:35:38,378 INFO L226 Difference]: Without dead ends: 62 [2020-09-17 02:35:38,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:38,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-17 02:35:38,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-17 02:35:38,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-17 02:35:38,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-17 02:35:38,382 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-17 02:35:38,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:38,382 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-17 02:35:38,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:35:38,382 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-17 02:35:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:35:38,383 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:38,383 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:38,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-17 02:35:38,593 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:38,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:38,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-17 02:35:38,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:38,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415766783] [2020-09-17 02:35:38,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:38,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415766783] [2020-09-17 02:35:38,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33944884] [2020-09-17 02:35:38,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:38,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:35:38,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:38,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:35:38,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:38,781 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:38,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:38,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-17 02:35:38,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637375968] [2020-09-17 02:35:38,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:35:38,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:38,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:35:38,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:35:38,796 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-17 02:35:39,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:39,142 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-17 02:35:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:35:39,143 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 02:35:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:39,144 INFO L225 Difference]: With dead ends: 67 [2020-09-17 02:35:39,144 INFO L226 Difference]: Without dead ends: 61 [2020-09-17 02:35:39,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:35:39,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-17 02:35:39,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-17 02:35:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:35:39,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-17 02:35:39,148 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-17 02:35:39,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:39,148 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-17 02:35:39,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:35:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-17 02:35:39,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:35:39,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:39,148 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:39,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-17 02:35:39,349 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:39,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:39,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-17 02:35:39,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:39,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885135307] [2020-09-17 02:35:39,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:39,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885135307] [2020-09-17 02:35:39,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351936397] [2020-09-17 02:35:39,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:39,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:35:39,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:39,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:39,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 02:35:39,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496724920] [2020-09-17 02:35:39,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:35:39,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:39,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:35:39,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:35:39,552 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-17 02:35:39,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:39,832 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-17 02:35:39,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:35:39,832 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-17 02:35:39,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:39,833 INFO L225 Difference]: With dead ends: 83 [2020-09-17 02:35:39,833 INFO L226 Difference]: Without dead ends: 77 [2020-09-17 02:35:39,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:35:39,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-17 02:35:39,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-17 02:35:39,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 02:35:39,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-17 02:35:39,837 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-17 02:35:39,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:39,837 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-17 02:35:39,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:35:39,837 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-17 02:35:39,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:35:39,838 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:39,838 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:40,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:40,039 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:40,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:40,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-17 02:35:40,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:40,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807227898] [2020-09-17 02:35:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:40,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807227898] [2020-09-17 02:35:40,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795313727] [2020-09-17 02:35:40,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:40,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:40,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:40,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:35:40,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:40,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:40,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-17 02:35:40,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058087109] [2020-09-17 02:35:40,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:35:40,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:40,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:35:40,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:35:40,230 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-17 02:35:40,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:40,514 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-09-17 02:35:40,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:35:40,514 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 02:35:40,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:40,515 INFO L225 Difference]: With dead ends: 62 [2020-09-17 02:35:40,515 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 02:35:40,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:35:40,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 02:35:40,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-09-17 02:35:40,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-17 02:35:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-17 02:35:40,518 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-17 02:35:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:40,519 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-17 02:35:40,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:35:40,519 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-17 02:35:40,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:35:40,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:40,519 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:40,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-17 02:35:40,729 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:40,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:40,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-17 02:35:40,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:40,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353385564] [2020-09-17 02:35:40,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:40,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353385564] [2020-09-17 02:35:40,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168473405] [2020-09-17 02:35:40,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:40,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:35:40,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:40,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:35:40,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:40,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:35:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:40,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:40,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-17 02:35:40,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470729669] [2020-09-17 02:35:40,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:35:40,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:40,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:35:40,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:35:40,902 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-17 02:35:41,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:41,256 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-17 02:35:41,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:35:41,257 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 02:35:41,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:41,257 INFO L225 Difference]: With dead ends: 68 [2020-09-17 02:35:41,258 INFO L226 Difference]: Without dead ends: 63 [2020-09-17 02:35:41,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:35:41,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-17 02:35:41,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-17 02:35:41,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 02:35:41,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-17 02:35:41,261 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-17 02:35:41,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:41,261 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-17 02:35:41,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:35:41,261 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-17 02:35:41,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:41,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:41,262 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:41,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-17 02:35:41,470 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:41,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:41,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-17 02:35:41,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:41,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401596331] [2020-09-17 02:35:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:41,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401596331] [2020-09-17 02:35:41,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255330055] [2020-09-17 02:35:41,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:41,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:41,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:41,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:35:41,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:41,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:35:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:41,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:41,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:35:41,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538025935] [2020-09-17 02:35:41,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:35:41,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:41,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:35:41,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:41,661 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-17 02:35:42,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:42,020 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-17 02:35:42,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:35:42,021 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:35:42,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:42,022 INFO L225 Difference]: With dead ends: 60 [2020-09-17 02:35:42,022 INFO L226 Difference]: Without dead ends: 55 [2020-09-17 02:35:42,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:35:42,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-17 02:35:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-17 02:35:42,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 02:35:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-17 02:35:42,026 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-17 02:35:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:42,026 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-17 02:35:42,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:35:42,026 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-17 02:35:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:42,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:42,027 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:42,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:42,236 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:42,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:42,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-17 02:35:42,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:42,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537854639] [2020-09-17 02:35:42,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:42,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537854639] [2020-09-17 02:35:42,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017751381] [2020-09-17 02:35:42,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:42,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 02:35:42,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:42,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:35:42,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:42,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:42,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 02:35:42,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378827931] [2020-09-17 02:35:42,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:35:42,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:42,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:35:42,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:35:42,428 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-17 02:35:42,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:42,604 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-17 02:35:42,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:35:42,605 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-17 02:35:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:42,606 INFO L225 Difference]: With dead ends: 66 [2020-09-17 02:35:42,606 INFO L226 Difference]: Without dead ends: 60 [2020-09-17 02:35:42,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:35:42,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-17 02:35:42,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-17 02:35:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:35:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-17 02:35:42,610 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-17 02:35:42,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:42,610 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-17 02:35:42,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:35:42,611 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-17 02:35:42,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:42,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:42,611 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:42,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:42,822 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:42,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:42,823 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-17 02:35:42,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:42,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555740227] [2020-09-17 02:35:42,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:42,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555740227] [2020-09-17 02:35:42,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647696368] [2020-09-17 02:35:42,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:43,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:35:43,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:43,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:35:43,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:43,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:43,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:43,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:35:43,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133832518] [2020-09-17 02:35:43,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:35:43,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:43,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:35:43,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:43,080 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-17 02:35:43,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:43,314 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-17 02:35:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:35:43,315 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:35:43,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:43,316 INFO L225 Difference]: With dead ends: 74 [2020-09-17 02:35:43,316 INFO L226 Difference]: Without dead ends: 68 [2020-09-17 02:35:43,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:35:43,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-17 02:35:43,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-17 02:35:43,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-17 02:35:43,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-17 02:35:43,321 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-17 02:35:43,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:43,321 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-17 02:35:43,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:35:43,321 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-17 02:35:43,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:43,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:43,322 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:43,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-17 02:35:43,533 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:43,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-17 02:35:43,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:43,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150721349] [2020-09-17 02:35:43,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:43,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150721349] [2020-09-17 02:35:43,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267683860] [2020-09-17 02:35:43,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:43,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:35:43,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:43,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:43,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 02:35:43,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109738746] [2020-09-17 02:35:43,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:35:43,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:43,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:35:43,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:35:43,715 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-17 02:35:43,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:43,940 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-17 02:35:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:35:43,941 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-17 02:35:43,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:43,942 INFO L225 Difference]: With dead ends: 75 [2020-09-17 02:35:43,942 INFO L226 Difference]: Without dead ends: 69 [2020-09-17 02:35:43,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:35:43,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-17 02:35:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-17 02:35:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-17 02:35:43,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-17 02:35:43,946 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-17 02:35:43,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:43,946 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-17 02:35:43,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:35:43,947 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-17 02:35:43,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:43,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:43,947 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:44,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:44,157 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:44,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:44,158 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-17 02:35:44,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:44,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205946471] [2020-09-17 02:35:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:44,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:44,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205946471] [2020-09-17 02:35:44,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302337310] [2020-09-17 02:35:44,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:44,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:44,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:44,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:35:44,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:44,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:44,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:44,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:35:44,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205168685] [2020-09-17 02:35:44,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:35:44,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:44,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:35:44,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:44,378 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-17 02:35:44,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:44,642 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-17 02:35:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:35:44,643 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:35:44,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:44,644 INFO L225 Difference]: With dead ends: 79 [2020-09-17 02:35:44,644 INFO L226 Difference]: Without dead ends: 73 [2020-09-17 02:35:44,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:35:44,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-17 02:35:44,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-17 02:35:44,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:35:44,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-17 02:35:44,647 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-17 02:35:44,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:44,647 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-17 02:35:44,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:35:44,648 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-17 02:35:44,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:44,648 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:44,648 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:44,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-17 02:35:44,849 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:44,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:44,850 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-17 02:35:44,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:44,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586010183] [2020-09-17 02:35:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:44,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586010183] [2020-09-17 02:35:44,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848275651] [2020-09-17 02:35:44,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:45,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 02:35:45,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:45,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:35:45,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:45,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:45,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 02:35:45,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59936792] [2020-09-17 02:35:45,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:35:45,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:45,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:35:45,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:35:45,082 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-17 02:35:45,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:45,417 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-17 02:35:45,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:35:45,417 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-17 02:35:45,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:45,418 INFO L225 Difference]: With dead ends: 79 [2020-09-17 02:35:45,418 INFO L226 Difference]: Without dead ends: 73 [2020-09-17 02:35:45,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:35:45,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-17 02:35:45,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-17 02:35:45,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-17 02:35:45,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-17 02:35:45,422 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-17 02:35:45,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:45,422 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-17 02:35:45,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:35:45,422 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-17 02:35:45,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:45,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:45,423 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:45,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:45,624 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:45,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:45,624 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-17 02:35:45,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:45,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32218492] [2020-09-17 02:35:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:45,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32218492] [2020-09-17 02:35:45,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682782492] [2020-09-17 02:35:45,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:45,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:45,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:45,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:35:45,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:45,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:45,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:45,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:35:45,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115278242] [2020-09-17 02:35:45,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:35:45,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:45,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:35:45,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:45,804 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-17 02:35:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:46,202 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-17 02:35:46,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:35:46,202 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:35:46,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:46,204 INFO L225 Difference]: With dead ends: 76 [2020-09-17 02:35:46,204 INFO L226 Difference]: Without dead ends: 70 [2020-09-17 02:35:46,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:35:46,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-17 02:35:46,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-17 02:35:46,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 02:35:46,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-17 02:35:46,209 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-17 02:35:46,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:46,209 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-17 02:35:46,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:35:46,210 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-17 02:35:46,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:46,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:46,211 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:46,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-17 02:35:46,423 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:46,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:46,424 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-17 02:35:46,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:46,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559274485] [2020-09-17 02:35:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:46,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559274485] [2020-09-17 02:35:46,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23098085] [2020-09-17 02:35:46,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:46,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 02:35:46,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:46,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:35:46,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:46,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:46,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 02:35:46,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66371316] [2020-09-17 02:35:46,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:35:46,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:46,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:35:46,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:35:46,677 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-17 02:35:47,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:47,083 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-17 02:35:47,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:35:47,084 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-17 02:35:47,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:47,085 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:35:47,086 INFO L226 Difference]: Without dead ends: 90 [2020-09-17 02:35:47,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:35:47,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-17 02:35:47,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-17 02:35:47,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:35:47,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-17 02:35:47,091 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-17 02:35:47,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:47,091 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-17 02:35:47,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:35:47,091 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-17 02:35:47,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:47,092 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:47,092 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:47,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-17 02:35:47,304 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:47,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:47,305 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-17 02:35:47,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:47,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461306138] [2020-09-17 02:35:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:47,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461306138] [2020-09-17 02:35:47,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443059937] [2020-09-17 02:35:47,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:47,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:35:47,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:47,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:35:47,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:47,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:47,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:47,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:35:47,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310149716] [2020-09-17 02:35:47,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:35:47,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:47,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:35:47,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:47,497 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-17 02:35:47,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:47,956 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-17 02:35:47,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:35:47,957 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:35:47,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:47,959 INFO L225 Difference]: With dead ends: 77 [2020-09-17 02:35:47,959 INFO L226 Difference]: Without dead ends: 69 [2020-09-17 02:35:47,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:35:47,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-17 02:35:47,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-17 02:35:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-17 02:35:47,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-17 02:35:47,963 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-17 02:35:47,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:47,964 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-17 02:35:47,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:35:47,964 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-17 02:35:47,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:35:47,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:47,965 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:48,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-17 02:35:48,166 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:48,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:48,167 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-17 02:35:48,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:48,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403042909] [2020-09-17 02:35:48,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:48,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403042909] [2020-09-17 02:35:48,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299243561] [2020-09-17 02:35:48,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:48,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:48,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:48,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:48,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 02:35:48,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495683198] [2020-09-17 02:35:48,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:35:48,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:48,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:35:48,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:48,439 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-17 02:35:48,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:48,689 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-17 02:35:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:35:48,690 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-17 02:35:48,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:48,691 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:35:48,692 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 02:35:48,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:35:48,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 02:35:48,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-17 02:35:48,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:35:48,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-17 02:35:48,696 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-17 02:35:48,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:48,697 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-17 02:35:48,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:35:48,697 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-17 02:35:48,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:35:48,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:48,698 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:48,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-17 02:35:48,910 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:48,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:48,910 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-17 02:35:48,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:48,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959918659] [2020-09-17 02:35:48,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:49,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959918659] [2020-09-17 02:35:49,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542527795] [2020-09-17 02:35:49,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:49,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:49,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:49,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:49,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:49,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:49,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:49,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:35:49,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615790264] [2020-09-17 02:35:49,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:49,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:49,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:49,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:49,115 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-17 02:35:49,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:49,445 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-17 02:35:49,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:35:49,445 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:35:49,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:49,446 INFO L225 Difference]: With dead ends: 81 [2020-09-17 02:35:49,446 INFO L226 Difference]: Without dead ends: 75 [2020-09-17 02:35:49,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:35:49,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-17 02:35:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-17 02:35:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:35:49,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-17 02:35:49,453 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-17 02:35:49,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:49,453 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-17 02:35:49,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:49,453 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-17 02:35:49,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:35:49,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:49,454 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:49,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-17 02:35:49,667 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:49,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-17 02:35:49,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:49,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418498495] [2020-09-17 02:35:49,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:49,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418498495] [2020-09-17 02:35:49,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124023184] [2020-09-17 02:35:49,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:49,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 02:35:49,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:49,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:49,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:49,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:49,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 02:35:49,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260699710] [2020-09-17 02:35:49,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:35:49,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:49,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:35:49,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:49,881 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-17 02:35:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:50,133 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-17 02:35:50,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:35:50,137 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-17 02:35:50,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:50,138 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:35:50,138 INFO L226 Difference]: Without dead ends: 72 [2020-09-17 02:35:50,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:35:50,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-17 02:35:50,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-17 02:35:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:35:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-17 02:35:50,142 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-17 02:35:50,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:50,142 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-17 02:35:50,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:35:50,143 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-17 02:35:50,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:35:50,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:50,143 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:50,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-17 02:35:50,345 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:50,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:50,346 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-17 02:35:50,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:50,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058217175] [2020-09-17 02:35:50,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:50,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058217175] [2020-09-17 02:35:50,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508889174] [2020-09-17 02:35:50,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:50,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:50,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:50,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:50,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:50,530 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:50,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:50,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:35:50,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450207383] [2020-09-17 02:35:50,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:50,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:50,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:50,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:50,542 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-17 02:35:50,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:50,916 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-17 02:35:50,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:35:50,917 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:35:50,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:50,918 INFO L225 Difference]: With dead ends: 77 [2020-09-17 02:35:50,918 INFO L226 Difference]: Without dead ends: 71 [2020-09-17 02:35:50,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:35:50,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-17 02:35:50,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-17 02:35:50,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:35:50,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-17 02:35:50,921 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-17 02:35:50,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:50,921 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-17 02:35:50,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:50,922 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-17 02:35:50,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:35:50,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:50,922 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:51,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-17 02:35:51,123 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:51,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:51,124 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-17 02:35:51,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:51,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788857332] [2020-09-17 02:35:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:51,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788857332] [2020-09-17 02:35:51,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645345121] [2020-09-17 02:35:51,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:51,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 02:35:51,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:51,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:51,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:51,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:51,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 02:35:51,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661640414] [2020-09-17 02:35:51,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:35:51,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:51,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:35:51,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:51,334 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-17 02:35:51,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:51,663 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-17 02:35:51,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:35:51,664 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-17 02:35:51,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:51,665 INFO L225 Difference]: With dead ends: 74 [2020-09-17 02:35:51,665 INFO L226 Difference]: Without dead ends: 68 [2020-09-17 02:35:51,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:35:51,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-17 02:35:51,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-17 02:35:51,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:35:51,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-17 02:35:51,669 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-17 02:35:51,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:51,669 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-17 02:35:51,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:35:51,670 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-17 02:35:51,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:35:51,670 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:51,670 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:51,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:51,880 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:51,881 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-17 02:35:51,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:51,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157561912] [2020-09-17 02:35:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:52,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157561912] [2020-09-17 02:35:52,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634792470] [2020-09-17 02:35:52,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:52,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:35:52,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:52,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:52,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:52,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:52,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:52,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:35:52,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217042273] [2020-09-17 02:35:52,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:52,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:52,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:52,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:52,111 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-17 02:35:52,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:52,587 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-17 02:35:52,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:35:52,592 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:35:52,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:52,593 INFO L225 Difference]: With dead ends: 73 [2020-09-17 02:35:52,593 INFO L226 Difference]: Without dead ends: 67 [2020-09-17 02:35:52,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:35:52,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-17 02:35:52,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-17 02:35:52,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:35:52,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-17 02:35:52,596 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-17 02:35:52,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:52,597 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-17 02:35:52,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:52,597 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-17 02:35:52,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:35:52,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:52,598 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:52,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-17 02:35:52,806 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:52,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:52,807 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-17 02:35:52,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:52,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531854007] [2020-09-17 02:35:52,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:52,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531854007] [2020-09-17 02:35:52,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131559526] [2020-09-17 02:35:52,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:52,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:52,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:52,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:52,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 02:35:52,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197801991] [2020-09-17 02:35:52,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:35:52,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:52,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:35:52,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:52,979 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-17 02:35:53,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:53,368 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-17 02:35:53,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:35:53,369 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-17 02:35:53,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:53,370 INFO L225 Difference]: With dead ends: 89 [2020-09-17 02:35:53,370 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 02:35:53,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:35:53,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 02:35:53,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-17 02:35:53,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-17 02:35:53,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-17 02:35:53,374 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-17 02:35:53,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:53,374 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-17 02:35:53,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:35:53,374 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-17 02:35:53,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:35:53,375 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:53,375 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:53,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:53,576 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:53,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:53,577 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-17 02:35:53,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:53,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105631718] [2020-09-17 02:35:53,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:53,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105631718] [2020-09-17 02:35:53,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742273336] [2020-09-17 02:35:53,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:53,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:53,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:53,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:53,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:53,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:53,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:53,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:35:53,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192887432] [2020-09-17 02:35:53,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:53,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:53,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:53,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:53,769 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-17 02:35:54,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:54,281 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-09-17 02:35:54,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:35:54,282 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:35:54,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:54,283 INFO L225 Difference]: With dead ends: 70 [2020-09-17 02:35:54,283 INFO L226 Difference]: Without dead ends: 62 [2020-09-17 02:35:54,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:35:54,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-17 02:35:54,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-09-17 02:35:54,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-17 02:35:54,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-17 02:35:54,287 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-17 02:35:54,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:54,287 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-17 02:35:54,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:54,287 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-17 02:35:54,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:35:54,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:54,287 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:54,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-17 02:35:54,488 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:54,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:54,489 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-17 02:35:54,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:54,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601908132] [2020-09-17 02:35:54,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:54,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:54,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601908132] [2020-09-17 02:35:54,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924728229] [2020-09-17 02:35:54,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:54,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 02:35:54,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:54,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:54,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:54,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:35:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:54,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:54,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:35:54,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466697422] [2020-09-17 02:35:54,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:54,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:54,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:54,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:54,704 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-17 02:35:55,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:55,190 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-17 02:35:55,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:35:55,190 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:35:55,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:55,191 INFO L225 Difference]: With dead ends: 76 [2020-09-17 02:35:55,191 INFO L226 Difference]: Without dead ends: 71 [2020-09-17 02:35:55,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:35:55,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-17 02:35:55,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-17 02:35:55,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:35:55,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-17 02:35:55,194 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-17 02:35:55,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:55,195 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-17 02:35:55,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:55,195 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-17 02:35:55,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:35:55,197 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:55,197 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:55,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:55,407 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:55,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:55,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-17 02:35:55,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:55,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383182635] [2020-09-17 02:35:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:55,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383182635] [2020-09-17 02:35:55,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334217079] [2020-09-17 02:35:55,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:55,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:55,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:55,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:35:55,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:55,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:35:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:55,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:55,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:35:55,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309288845] [2020-09-17 02:35:55,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:35:55,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:55,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:35:55,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:35:55,647 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-17 02:35:56,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:56,146 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-17 02:35:56,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:35:56,147 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:35:56,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:56,148 INFO L225 Difference]: With dead ends: 66 [2020-09-17 02:35:56,148 INFO L226 Difference]: Without dead ends: 61 [2020-09-17 02:35:56,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:35:56,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-17 02:35:56,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-17 02:35:56,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:35:56,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-17 02:35:56,151 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-17 02:35:56,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:56,151 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-17 02:35:56,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:35:56,151 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-17 02:35:56,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:35:56,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:56,152 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:56,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-17 02:35:56,360 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:56,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:56,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-17 02:35:56,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:56,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378782944] [2020-09-17 02:35:56,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:56,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378782944] [2020-09-17 02:35:56,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362970351] [2020-09-17 02:35:56,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:56,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 02:35:56,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:56,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:35:56,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:56,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:56,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:35:56,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980246031] [2020-09-17 02:35:56,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:56,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:56,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:56,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:56,567 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-17 02:35:56,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:56,777 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-17 02:35:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:35:56,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:35:56,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:56,779 INFO L225 Difference]: With dead ends: 72 [2020-09-17 02:35:56,779 INFO L226 Difference]: Without dead ends: 66 [2020-09-17 02:35:56,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:35:56,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-17 02:35:56,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-17 02:35:56,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 02:35:56,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-17 02:35:56,783 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-17 02:35:56,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:56,783 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-17 02:35:56,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:56,783 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-17 02:35:56,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:35:56,784 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:56,784 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:56,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-17 02:35:56,996 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:56,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:56,997 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-17 02:35:56,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:56,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758819875] [2020-09-17 02:35:56,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:57,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758819875] [2020-09-17 02:35:57,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578486491] [2020-09-17 02:35:57,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:57,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 02:35:57,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:57,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:35:57,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:57,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:57,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:57,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:57,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:35:57,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702262892] [2020-09-17 02:35:57,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:35:57,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:57,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:35:57,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:35:57,262 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-17 02:35:57,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:57,538 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-17 02:35:57,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:35:57,539 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:35:57,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:57,540 INFO L225 Difference]: With dead ends: 82 [2020-09-17 02:35:57,540 INFO L226 Difference]: Without dead ends: 76 [2020-09-17 02:35:57,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:35:57,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-17 02:35:57,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-17 02:35:57,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 02:35:57,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-17 02:35:57,546 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-17 02:35:57,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:57,546 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-17 02:35:57,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:35:57,547 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-17 02:35:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:35:57,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:57,548 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:57,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-17 02:35:57,760 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:57,761 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-17 02:35:57,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:57,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108435022] [2020-09-17 02:35:57,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:57,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108435022] [2020-09-17 02:35:57,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400306841] [2020-09-17 02:35:57,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:57,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:35:57,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:58,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:58,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:35:58,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423685884] [2020-09-17 02:35:58,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:58,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:58,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:58,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:58,001 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-17 02:35:58,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:58,334 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-17 02:35:58,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:35:58,334 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:35:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:58,336 INFO L225 Difference]: With dead ends: 83 [2020-09-17 02:35:58,336 INFO L226 Difference]: Without dead ends: 77 [2020-09-17 02:35:58,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:35:58,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-17 02:35:58,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-17 02:35:58,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-17 02:35:58,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-17 02:35:58,340 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-17 02:35:58,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:58,340 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-17 02:35:58,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:58,340 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-17 02:35:58,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:35:58,341 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:58,341 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:58,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-17 02:35:58,547 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:58,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:58,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-17 02:35:58,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:58,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036079494] [2020-09-17 02:35:58,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:58,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036079494] [2020-09-17 02:35:58,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163616650] [2020-09-17 02:35:58,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:58,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:58,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:58,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:35:58,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:58,768 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:58,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:58,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:35:58,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730270207] [2020-09-17 02:35:58,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:35:58,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:58,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:35:58,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:35:58,783 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-17 02:35:59,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:59,156 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-17 02:35:59,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:35:59,157 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:35:59,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:59,158 INFO L225 Difference]: With dead ends: 89 [2020-09-17 02:35:59,158 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 02:35:59,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:35:59,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 02:35:59,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-17 02:35:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 02:35:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-17 02:35:59,168 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-17 02:35:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:59,168 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-17 02:35:59,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:35:59,168 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-17 02:35:59,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:35:59,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:59,169 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:59,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:59,377 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:59,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:59,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-17 02:35:59,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:59,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030647529] [2020-09-17 02:35:59,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:59,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030647529] [2020-09-17 02:35:59,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916019595] [2020-09-17 02:35:59,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:59,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 02:35:59,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:59,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:35:59,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:59,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:59,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:35:59,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370641198] [2020-09-17 02:35:59,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:59,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:59,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:59,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:59,587 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-17 02:35:59,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:59,953 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-17 02:35:59,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:35:59,953 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:35:59,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:59,954 INFO L225 Difference]: With dead ends: 89 [2020-09-17 02:35:59,955 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 02:35:59,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:35:59,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 02:35:59,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-17 02:35:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:35:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-17 02:35:59,958 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-17 02:35:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:59,958 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-17 02:35:59,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-17 02:35:59,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:35:59,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:59,959 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:00,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:00,167 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:00,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:00,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-17 02:36:00,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:00,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346007233] [2020-09-17 02:36:00,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:00,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346007233] [2020-09-17 02:36:00,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686362901] [2020-09-17 02:36:00,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:00,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:00,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:00,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:36:00,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:00,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:00,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:00,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:36:00,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016745380] [2020-09-17 02:36:00,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:36:00,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:00,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:36:00,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:36:00,418 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-17 02:36:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:00,916 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-17 02:36:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:36:00,916 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:36:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:00,917 INFO L225 Difference]: With dead ends: 86 [2020-09-17 02:36:00,918 INFO L226 Difference]: Without dead ends: 80 [2020-09-17 02:36:00,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:36:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-17 02:36:00,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-17 02:36:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:36:00,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-17 02:36:00,921 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-17 02:36:00,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:00,922 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-17 02:36:00,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:36:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-17 02:36:00,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:36:00,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:00,923 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:01,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-17 02:36:01,125 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:01,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:01,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-17 02:36:01,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:01,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175126358] [2020-09-17 02:36:01,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:01,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175126358] [2020-09-17 02:36:01,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039247381] [2020-09-17 02:36:01,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:01,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 02:36:01,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:01,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:36:01,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:01,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:01,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:36:01,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243388272] [2020-09-17 02:36:01,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:36:01,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:01,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:36:01,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:36:01,348 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-17 02:36:01,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:01,777 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-17 02:36:01,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:36:01,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:36:01,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:01,778 INFO L225 Difference]: With dead ends: 87 [2020-09-17 02:36:01,778 INFO L226 Difference]: Without dead ends: 81 [2020-09-17 02:36:01,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:36:01,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-17 02:36:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-17 02:36:01,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-17 02:36:01,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-17 02:36:01,781 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-17 02:36:01,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:01,781 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-17 02:36:01,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:36:01,782 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-17 02:36:01,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:36:01,782 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:01,782 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:01,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:01,983 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:01,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:01,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-17 02:36:01,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:01,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515966150] [2020-09-17 02:36:01,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:02,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515966150] [2020-09-17 02:36:02,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091643673] [2020-09-17 02:36:02,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:02,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 02:36:02,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:02,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:36:02,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:02,171 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:02,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:02,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:36:02,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489306262] [2020-09-17 02:36:02,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:36:02,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:02,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:36:02,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:36:02,187 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-17 02:36:02,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:02,723 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-17 02:36:02,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:36:02,723 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:36:02,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:02,724 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:36:02,724 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 02:36:02,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:36:02,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 02:36:02,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-17 02:36:02,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:36:02,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-17 02:36:02,728 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-17 02:36:02,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:02,728 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-17 02:36:02,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:36:02,728 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-17 02:36:02,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:36:02,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:02,729 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:02,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-17 02:36:02,936 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:02,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:02,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-17 02:36:02,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:02,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561957898] [2020-09-17 02:36:02,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:03,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561957898] [2020-09-17 02:36:03,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260166128] [2020-09-17 02:36:03,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:03,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:36:03,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:03,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:03,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:36:03,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742995981] [2020-09-17 02:36:03,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:36:03,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:03,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:36:03,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:36:03,134 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-17 02:36:03,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:03,617 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-17 02:36:03,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:36:03,617 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:36:03,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:03,618 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:36:03,618 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:36:03,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:36:03,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:36:03,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-17 02:36:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:36:03,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-17 02:36:03,621 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-17 02:36:03,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:03,621 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-17 02:36:03,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:36:03,622 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-17 02:36:03,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:36:03,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:03,622 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:03,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-17 02:36:03,825 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:03,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:03,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-17 02:36:03,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:03,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99132012] [2020-09-17 02:36:03,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:03,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99132012] [2020-09-17 02:36:03,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315806202] [2020-09-17 02:36:03,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:04,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:04,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:04,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:36:04,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:04,030 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:04,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:04,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:36:04,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666833998] [2020-09-17 02:36:04,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:36:04,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:04,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:36:04,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:36:04,052 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-17 02:36:04,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:04,635 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-17 02:36:04,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:36:04,635 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:36:04,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:04,636 INFO L225 Difference]: With dead ends: 85 [2020-09-17 02:36:04,636 INFO L226 Difference]: Without dead ends: 77 [2020-09-17 02:36:04,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:36:04,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-17 02:36:04,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-17 02:36:04,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-17 02:36:04,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-17 02:36:04,639 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-17 02:36:04,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:04,639 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-17 02:36:04,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:36:04,639 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-17 02:36:04,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:36:04,640 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:04,640 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:04,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-17 02:36:04,849 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:04,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:04,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-17 02:36:04,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:04,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009130177] [2020-09-17 02:36:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:05,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009130177] [2020-09-17 02:36:05,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803028332] [2020-09-17 02:36:05,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:05,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 02:36:05,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:05,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:36:05,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:05,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:05,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:36:05,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427362562] [2020-09-17 02:36:05,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:36:05,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:05,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:36:05,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:36:05,095 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-17 02:36:05,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:05,376 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-17 02:36:05,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:36:05,377 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:36:05,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:05,378 INFO L225 Difference]: With dead ends: 94 [2020-09-17 02:36:05,379 INFO L226 Difference]: Without dead ends: 88 [2020-09-17 02:36:05,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:36:05,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-17 02:36:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-17 02:36:05,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:36:05,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:36:05,383 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-17 02:36:05,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:05,383 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:36:05,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:36:05,384 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:36:05,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:36:05,384 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:05,384 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:05,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-17 02:36:05,593 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:05,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:05,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-17 02:36:05,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:05,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121572471] [2020-09-17 02:36:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:05,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121572471] [2020-09-17 02:36:05,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373203470] [2020-09-17 02:36:05,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:05,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:05,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:05,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:36:05,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:05,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:05,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:05,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:36:05,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002977009] [2020-09-17 02:36:05,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:05,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:05,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:05,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:05,858 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-17 02:36:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:06,247 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-17 02:36:06,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:36:06,248 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:36:06,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:06,249 INFO L225 Difference]: With dead ends: 91 [2020-09-17 02:36:06,249 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:36:06,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:36:06,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:36:06,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-17 02:36:06,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:36:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:36:06,254 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-17 02:36:06,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:06,254 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:36:06,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:06,255 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:36:06,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:36:06,255 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:06,255 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:06,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-17 02:36:06,462 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:06,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:06,463 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-17 02:36:06,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:06,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556937522] [2020-09-17 02:36:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:06,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:06,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556937522] [2020-09-17 02:36:06,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042752556] [2020-09-17 02:36:06,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:06,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 02:36:06,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:06,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:36:06,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:06,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:06,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:36:06,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901912250] [2020-09-17 02:36:06,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:36:06,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:06,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:36:06,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:36:06,727 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-17 02:36:07,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:07,053 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-17 02:36:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:36:07,054 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:36:07,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:07,055 INFO L225 Difference]: With dead ends: 88 [2020-09-17 02:36:07,055 INFO L226 Difference]: Without dead ends: 82 [2020-09-17 02:36:07,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:36:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-17 02:36:07,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-17 02:36:07,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:36:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:36:07,058 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-17 02:36:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:07,059 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:36:07,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:36:07,059 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:36:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:36:07,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:07,059 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:07,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:07,260 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:07,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:07,261 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-17 02:36:07,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:07,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403990914] [2020-09-17 02:36:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:07,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403990914] [2020-09-17 02:36:07,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338911341] [2020-09-17 02:36:07,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:07,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 02:36:07,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:07,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:36:07,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:07,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:07,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:07,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:36:07,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959365256] [2020-09-17 02:36:07,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:07,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:07,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:07,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:07,516 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-17 02:36:07,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:07,981 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-17 02:36:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:36:07,982 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:36:07,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:07,983 INFO L225 Difference]: With dead ends: 87 [2020-09-17 02:36:07,983 INFO L226 Difference]: Without dead ends: 81 [2020-09-17 02:36:07,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:36:07,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-17 02:36:07,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-17 02:36:07,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:36:07,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:36:07,987 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-17 02:36:07,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:07,987 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:36:07,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:07,988 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:36:07,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:36:07,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:07,988 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:08,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:08,199 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:08,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:08,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-17 02:36:08,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:08,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988825607] [2020-09-17 02:36:08,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:08,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988825607] [2020-09-17 02:36:08,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103885913] [2020-09-17 02:36:08,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:08,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:08,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:36:08,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:08,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:08,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:36:08,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976250282] [2020-09-17 02:36:08,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:36:08,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:08,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:36:08,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:36:08,431 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-17 02:36:08,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:08,832 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-17 02:36:08,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:36:08,833 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:36:08,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:08,834 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:36:08,834 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 02:36:08,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:36:08,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 02:36:08,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-17 02:36:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:36:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:36:08,840 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-17 02:36:08,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:08,840 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:36:08,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:36:08,841 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:36:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:36:08,841 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:08,841 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:09,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-17 02:36:09,048 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:09,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:09,049 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-17 02:36:09,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:09,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128485071] [2020-09-17 02:36:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:09,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128485071] [2020-09-17 02:36:09,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565151325] [2020-09-17 02:36:09,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:09,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:09,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:09,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:36:09,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:09,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:09,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:09,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:36:09,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880843041] [2020-09-17 02:36:09,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:09,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:09,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:09,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:09,266 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-17 02:36:09,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:09,787 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-17 02:36:09,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:36:09,788 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:36:09,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:09,789 INFO L225 Difference]: With dead ends: 83 [2020-09-17 02:36:09,789 INFO L226 Difference]: Without dead ends: 77 [2020-09-17 02:36:09,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:36:09,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-17 02:36:09,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-17 02:36:09,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:36:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:36:09,792 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-17 02:36:09,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:09,793 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:36:09,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:09,793 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:36:09,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:36:09,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:09,794 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:09,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:09,995 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:09,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:09,995 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-17 02:36:09,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:09,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660125159] [2020-09-17 02:36:09,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:10,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660125159] [2020-09-17 02:36:10,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104943694] [2020-09-17 02:36:10,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:10,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 02:36:10,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:10,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:36:10,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:10,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:10,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:36:10,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662833277] [2020-09-17 02:36:10,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:36:10,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:10,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:36:10,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:36:10,216 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-17 02:36:10,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:10,685 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-17 02:36:10,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:36:10,686 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:36:10,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:10,687 INFO L225 Difference]: With dead ends: 80 [2020-09-17 02:36:10,687 INFO L226 Difference]: Without dead ends: 74 [2020-09-17 02:36:10,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:36:10,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-17 02:36:10,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-17 02:36:10,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:36:10,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:36:10,690 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-17 02:36:10,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:10,691 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:36:10,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:36:10,691 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:36:10,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:36:10,691 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:10,692 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:10,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-17 02:36:10,893 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:10,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:10,893 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-17 02:36:10,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:10,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588182814] [2020-09-17 02:36:10,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:11,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588182814] [2020-09-17 02:36:11,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502179400] [2020-09-17 02:36:11,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:11,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:11,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:11,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:36:11,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:11,134 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:11,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:11,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:36:11,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028997126] [2020-09-17 02:36:11,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:11,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:11,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:11,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:11,150 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-17 02:36:11,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:11,793 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-17 02:36:11,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:36:11,794 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:36:11,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:11,795 INFO L225 Difference]: With dead ends: 79 [2020-09-17 02:36:11,795 INFO L226 Difference]: Without dead ends: 73 [2020-09-17 02:36:11,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:36:11,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-17 02:36:11,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-17 02:36:11,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:36:11,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:36:11,800 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-17 02:36:11,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:11,800 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:36:11,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:11,800 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:36:11,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:36:11,801 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:11,801 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:12,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:12,002 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:12,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:12,002 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-17 02:36:12,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:12,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369972627] [2020-09-17 02:36:12,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:12,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369972627] [2020-09-17 02:36:12,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011560396] [2020-09-17 02:36:12,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:12,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 02:36:12,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:12,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:36:12,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:12,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:12,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:36:12,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712531001] [2020-09-17 02:36:12,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:36:12,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:12,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:36:12,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:36:12,219 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-17 02:36:12,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:12,731 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-17 02:36:12,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:36:12,731 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:36:12,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:12,732 INFO L225 Difference]: With dead ends: 95 [2020-09-17 02:36:12,732 INFO L226 Difference]: Without dead ends: 89 [2020-09-17 02:36:12,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:36:12,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-17 02:36:12,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-17 02:36:12,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:36:12,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-17 02:36:12,735 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-17 02:36:12,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:12,735 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-17 02:36:12,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:36:12,735 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-17 02:36:12,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:36:12,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:12,736 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:12,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-17 02:36:12,936 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:12,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:12,937 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-17 02:36:12,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:12,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079043281] [2020-09-17 02:36:12,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:13,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079043281] [2020-09-17 02:36:13,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127319762] [2020-09-17 02:36:13,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:13,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 02:36:13,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:13,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:13,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:13,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:13,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:36:13,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656612591] [2020-09-17 02:36:13,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:13,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:13,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:13,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:13,150 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-17 02:36:13,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:13,741 INFO L93 Difference]: Finished difference Result 74 states and 181 transitions. [2020-09-17 02:36:13,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:36:13,741 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:36:13,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:13,742 INFO L225 Difference]: With dead ends: 74 [2020-09-17 02:36:13,742 INFO L226 Difference]: Without dead ends: 66 [2020-09-17 02:36:13,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=326, Invalid=796, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:36:13,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-17 02:36:13,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2020-09-17 02:36:13,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-17 02:36:13,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-17 02:36:13,745 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-17 02:36:13,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:13,745 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-17 02:36:13,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:13,746 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-17 02:36:13,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:36:13,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:13,746 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:13,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:13,947 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:13,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:13,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-17 02:36:13,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:13,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311662172] [2020-09-17 02:36:13,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:14,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311662172] [2020-09-17 02:36:14,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446513758] [2020-09-17 02:36:14,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:14,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:36:14,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:14,169 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:36:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:14,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:14,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:36:14,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766186745] [2020-09-17 02:36:14,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:14,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:14,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:14,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:14,185 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-17 02:36:14,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:14,791 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-17 02:36:14,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:36:14,792 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:36:14,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:14,793 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:36:14,793 INFO L226 Difference]: Without dead ends: 79 [2020-09-17 02:36:14,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:36:14,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-17 02:36:14,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-17 02:36:14,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:36:14,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-17 02:36:14,796 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-17 02:36:14,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:14,797 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-17 02:36:14,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:14,797 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-17 02:36:14,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:14,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:14,797 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:14,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-17 02:36:14,998 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:14,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:14,999 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-17 02:36:15,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:15,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92673906] [2020-09-17 02:36:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:15,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92673906] [2020-09-17 02:36:15,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462933422] [2020-09-17 02:36:15,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:15,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:15,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:15,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:15,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:15,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:36:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:15,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:15,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:36:15,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012392689] [2020-09-17 02:36:15,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:15,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:15,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:15,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:15,248 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-09-17 02:36:15,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:15,923 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-09-17 02:36:15,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:36:15,924 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:36:15,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:15,925 INFO L225 Difference]: With dead ends: 72 [2020-09-17 02:36:15,925 INFO L226 Difference]: Without dead ends: 67 [2020-09-17 02:36:15,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:36:15,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-17 02:36:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-09-17 02:36:15,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:36:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-17 02:36:15,928 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-09-17 02:36:15,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:15,928 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-17 02:36:15,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:15,928 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-17 02:36:15,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:15,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:15,929 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:16,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-17 02:36:16,130 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:16,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:16,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-17 02:36:16,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:16,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009182335] [2020-09-17 02:36:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:16,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009182335] [2020-09-17 02:36:16,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457726035] [2020-09-17 02:36:16,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:16,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:36:16,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:16,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:16,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:16,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:16,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:36:16,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830462240] [2020-09-17 02:36:16,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:16,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:16,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:16,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:16,409 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-09-17 02:36:16,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:16,717 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-09-17 02:36:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:36:16,718 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:36:16,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:16,719 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:36:16,719 INFO L226 Difference]: Without dead ends: 72 [2020-09-17 02:36:16,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:36:16,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-17 02:36:16,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-17 02:36:16,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:36:16,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-17 02:36:16,722 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-09-17 02:36:16,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:16,722 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-17 02:36:16,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:16,723 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-17 02:36:16,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:16,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:16,723 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:16,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:16,925 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:16,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:16,926 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-09-17 02:36:16,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:16,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13557529] [2020-09-17 02:36:16,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:17,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13557529] [2020-09-17 02:36:17,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624916035] [2020-09-17 02:36:17,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:17,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:17,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:17,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:17,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:17,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:17,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:17,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:36:17,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808396210] [2020-09-17 02:36:17,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:17,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:17,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:17,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:17,226 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-09-17 02:36:17,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:17,577 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-09-17 02:36:17,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:36:17,577 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:36:17,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:17,578 INFO L225 Difference]: With dead ends: 90 [2020-09-17 02:36:17,579 INFO L226 Difference]: Without dead ends: 84 [2020-09-17 02:36:17,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:36:17,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-17 02:36:17,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-09-17 02:36:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:36:17,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-09-17 02:36:17,582 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-09-17 02:36:17,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:17,582 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-09-17 02:36:17,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:17,582 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-09-17 02:36:17,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:17,583 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:17,583 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:17,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:17,791 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:17,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:17,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-09-17 02:36:17,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:17,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611286517] [2020-09-17 02:36:17,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:17,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611286517] [2020-09-17 02:36:17,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118301301] [2020-09-17 02:36:17,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:18,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 02:36:18,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:18,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:18,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:18,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:18,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:36:18,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629884614] [2020-09-17 02:36:18,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:18,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:18,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:18,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:18,036 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-09-17 02:36:18,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:18,443 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-09-17 02:36:18,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:36:18,443 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:36:18,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:18,445 INFO L225 Difference]: With dead ends: 91 [2020-09-17 02:36:18,445 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:36:18,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:36:18,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:36:18,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-09-17 02:36:18,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-17 02:36:18,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-09-17 02:36:18,448 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-09-17 02:36:18,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:18,448 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-09-17 02:36:18,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:18,448 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-09-17 02:36:18,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:18,449 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:18,449 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:18,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:18,657 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:18,658 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-09-17 02:36:18,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:18,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221341592] [2020-09-17 02:36:18,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:18,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221341592] [2020-09-17 02:36:18,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684014557] [2020-09-17 02:36:18,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:18,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 02:36:18,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:18,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:18,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:18,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:19,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:19,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:36:19,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955477353] [2020-09-17 02:36:19,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:19,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:19,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:19,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:19,011 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-09-17 02:36:19,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:19,440 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-09-17 02:36:19,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:36:19,441 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:36:19,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:19,442 INFO L225 Difference]: With dead ends: 99 [2020-09-17 02:36:19,442 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:36:19,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:36:19,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:36:19,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-09-17 02:36:19,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:36:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-09-17 02:36:19,444 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-09-17 02:36:19,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:19,445 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-09-17 02:36:19,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:19,445 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-09-17 02:36:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:19,445 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:19,446 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:19,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:19,655 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:19,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:19,656 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-09-17 02:36:19,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:19,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771074200] [2020-09-17 02:36:19,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:19,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771074200] [2020-09-17 02:36:19,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703235282] [2020-09-17 02:36:19,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:19,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:19,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:19,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:19,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:36:19,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582725746] [2020-09-17 02:36:19,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:19,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:19,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:19,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:19,955 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-09-17 02:36:20,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:20,383 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-17 02:36:20,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:36:20,384 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:36:20,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:20,385 INFO L225 Difference]: With dead ends: 99 [2020-09-17 02:36:20,385 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:36:20,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:36:20,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:36:20,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-09-17 02:36:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-17 02:36:20,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-09-17 02:36:20,388 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-09-17 02:36:20,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:20,389 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-09-17 02:36:20,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:20,389 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-09-17 02:36:20,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:20,389 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:20,389 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:20,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-17 02:36:20,597 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:20,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:20,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-09-17 02:36:20,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:20,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142054703] [2020-09-17 02:36:20,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:20,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142054703] [2020-09-17 02:36:20,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074968665] [2020-09-17 02:36:20,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:20,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:20,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:20,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:20,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:20,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:20,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:20,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:36:20,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068512333] [2020-09-17 02:36:20,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:20,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:20,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:20,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:20,865 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-09-17 02:36:21,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:21,414 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-09-17 02:36:21,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:36:21,415 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:36:21,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:21,416 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:36:21,416 INFO L226 Difference]: Without dead ends: 90 [2020-09-17 02:36:21,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:36:21,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-17 02:36:21,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-09-17 02:36:21,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-17 02:36:21,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-09-17 02:36:21,419 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-09-17 02:36:21,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:21,419 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-09-17 02:36:21,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:21,419 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-09-17 02:36:21,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:21,420 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:21,420 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:21,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:21,621 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:21,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:21,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-09-17 02:36:21,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:21,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225063230] [2020-09-17 02:36:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:21,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225063230] [2020-09-17 02:36:21,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781815363] [2020-09-17 02:36:21,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:21,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:36:21,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:21,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:21,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:21,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:21,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:36:21,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862993696] [2020-09-17 02:36:21,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:21,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:21,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:21,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:21,871 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-09-17 02:36:22,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:22,381 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-09-17 02:36:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:36:22,382 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:36:22,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:22,383 INFO L225 Difference]: With dead ends: 97 [2020-09-17 02:36:22,383 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 02:36:22,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:36:22,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 02:36:22,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-09-17 02:36:22,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:36:22,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:36:22,386 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-09-17 02:36:22,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:22,386 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:36:22,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:22,386 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:36:22,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:22,386 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:22,387 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:22,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-17 02:36:22,588 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:22,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:22,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-09-17 02:36:22,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:22,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012929900] [2020-09-17 02:36:22,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:22,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012929900] [2020-09-17 02:36:22,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872914146] [2020-09-17 02:36:22,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:22,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:22,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:22,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:22,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:22,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:22,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:22,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:36:22,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003874870] [2020-09-17 02:36:22,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:22,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:22,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:22,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:22,882 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-09-17 02:36:23,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:23,555 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-17 02:36:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:36:23,555 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:36:23,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:23,556 INFO L225 Difference]: With dead ends: 94 [2020-09-17 02:36:23,556 INFO L226 Difference]: Without dead ends: 88 [2020-09-17 02:36:23,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:36:23,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-17 02:36:23,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-09-17 02:36:23,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:36:23,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:36:23,559 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-09-17 02:36:23,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:23,560 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:36:23,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:23,560 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:36:23,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:23,561 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:23,561 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:23,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:23,769 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:23,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:23,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-09-17 02:36:23,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:23,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736999458] [2020-09-17 02:36:23,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:23,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736999458] [2020-09-17 02:36:23,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213334933] [2020-09-17 02:36:23,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:23,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 02:36:23,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:23,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:23,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:24,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:24,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:36:24,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969140193] [2020-09-17 02:36:24,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:24,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:24,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:24,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:24,013 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-09-17 02:36:24,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:24,584 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-09-17 02:36:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:36:24,585 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:36:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:24,586 INFO L225 Difference]: With dead ends: 95 [2020-09-17 02:36:24,586 INFO L226 Difference]: Without dead ends: 89 [2020-09-17 02:36:24,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:36:24,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-17 02:36:24,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-09-17 02:36:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-17 02:36:24,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-09-17 02:36:24,589 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-09-17 02:36:24,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:24,589 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-09-17 02:36:24,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:24,589 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-09-17 02:36:24,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:24,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:24,590 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:24,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-17 02:36:24,799 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:24,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:24,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-09-17 02:36:24,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:24,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184954519] [2020-09-17 02:36:24,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:24,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184954519] [2020-09-17 02:36:24,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768153387] [2020-09-17 02:36:24,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:25,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 02:36:25,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:25,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:25,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:25,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:25,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:25,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:36:25,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292387808] [2020-09-17 02:36:25,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:25,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:25,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:25,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:25,072 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-09-17 02:36:25,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:25,795 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-09-17 02:36:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:36:25,796 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:36:25,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:25,797 INFO L225 Difference]: With dead ends: 92 [2020-09-17 02:36:25,797 INFO L226 Difference]: Without dead ends: 86 [2020-09-17 02:36:25,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:36:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-17 02:36:25,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-09-17 02:36:25,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:36:25,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-17 02:36:25,800 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-09-17 02:36:25,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:25,800 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-17 02:36:25,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:25,800 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-17 02:36:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:25,801 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:25,801 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:26,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:26,002 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:26,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:26,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-09-17 02:36:26,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:26,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093021476] [2020-09-17 02:36:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:26,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093021476] [2020-09-17 02:36:26,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863846582] [2020-09-17 02:36:26,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:26,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:26,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:26,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:26,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:36:26,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619546430] [2020-09-17 02:36:26,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:26,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:26,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:26,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:26,220 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-09-17 02:36:26,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:26,836 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-09-17 02:36:26,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:36:26,837 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:36:26,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:26,838 INFO L225 Difference]: With dead ends: 112 [2020-09-17 02:36:26,838 INFO L226 Difference]: Without dead ends: 106 [2020-09-17 02:36:26,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:36:26,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-17 02:36:26,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-09-17 02:36:26,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:36:26,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-09-17 02:36:26,841 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-09-17 02:36:26,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:26,842 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-09-17 02:36:26,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:26,842 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-09-17 02:36:26,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:26,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:26,842 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:27,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:27,044 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:27,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:27,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-09-17 02:36:27,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:27,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428490598] [2020-09-17 02:36:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:27,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:27,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428490598] [2020-09-17 02:36:27,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945011537] [2020-09-17 02:36:27,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:27,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:27,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:27,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:27,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:27,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:27,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:27,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:36:27,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817689820] [2020-09-17 02:36:27,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:27,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:27,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:27,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:27,314 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-09-17 02:36:28,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:28,014 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-09-17 02:36:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:36:28,014 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:36:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:28,015 INFO L225 Difference]: With dead ends: 93 [2020-09-17 02:36:28,015 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:36:28,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:36:28,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:36:28,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-09-17 02:36:28,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-17 02:36:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-09-17 02:36:28,019 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-09-17 02:36:28,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:28,019 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-09-17 02:36:28,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-09-17 02:36:28,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:28,020 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:28,020 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:28,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:28,231 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:28,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:28,232 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-09-17 02:36:28,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:28,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757631815] [2020-09-17 02:36:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:28,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757631815] [2020-09-17 02:36:28,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384498611] [2020-09-17 02:36:28,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:28,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:36:28,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:28,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:28,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:28,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:28,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:36:28,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967580187] [2020-09-17 02:36:28,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:28,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:28,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:28,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:28,553 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-09-17 02:36:28,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:28,944 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-09-17 02:36:28,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:36:28,945 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:36:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:28,946 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:36:28,946 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:36:28,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:36:28,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:36:28,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-17 02:36:28,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:36:28,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:36:28,949 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:36:28,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:28,949 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:36:28,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:28,950 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:36:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:28,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:28,951 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:29,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:29,157 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:29,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:29,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-09-17 02:36:29,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:29,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543827506] [2020-09-17 02:36:29,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:29,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543827506] [2020-09-17 02:36:29,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493686270] [2020-09-17 02:36:29,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:29,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:29,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:29,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:29,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:29,430 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:29,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:29,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:36:29,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757284341] [2020-09-17 02:36:29,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:29,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:29,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:29,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:29,443 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:36:29,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:29,897 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-09-17 02:36:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:36:29,897 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:36:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:29,898 INFO L225 Difference]: With dead ends: 101 [2020-09-17 02:36:29,899 INFO L226 Difference]: Without dead ends: 95 [2020-09-17 02:36:29,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:36:29,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-17 02:36:29,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-09-17 02:36:29,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:36:29,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:36:29,901 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:36:29,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:29,901 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:36:29,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:29,901 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:36:29,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:29,902 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:29,902 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:30,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:30,103 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:30,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:30,103 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-09-17 02:36:30,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:30,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758801329] [2020-09-17 02:36:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:30,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758801329] [2020-09-17 02:36:30,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398874663] [2020-09-17 02:36:30,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:30,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 02:36:30,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:30,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:30,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:30,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:30,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:36:30,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222441668] [2020-09-17 02:36:30,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:30,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:30,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:30,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:30,362 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:36:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:30,796 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-09-17 02:36:30,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:36:30,797 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:36:30,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:30,798 INFO L225 Difference]: With dead ends: 98 [2020-09-17 02:36:30,798 INFO L226 Difference]: Without dead ends: 92 [2020-09-17 02:36:30,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:36:30,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-17 02:36:30,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-09-17 02:36:30,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:36:30,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:36:30,801 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:36:30,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:30,801 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:36:30,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:30,801 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:36:30,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:30,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:30,802 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:31,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:31,005 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:31,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:31,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-09-17 02:36:31,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:31,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385218538] [2020-09-17 02:36:31,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:31,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385218538] [2020-09-17 02:36:31,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123212109] [2020-09-17 02:36:31,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:31,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 02:36:31,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:31,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:31,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:31,308 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:31,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:31,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:36:31,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329340473] [2020-09-17 02:36:31,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:31,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:31,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:31,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:31,321 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:36:31,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:31,885 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-17 02:36:31,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:36:31,886 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:36:31,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:31,887 INFO L225 Difference]: With dead ends: 97 [2020-09-17 02:36:31,887 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 02:36:31,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:36:31,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 02:36:31,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-09-17 02:36:31,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:36:31,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:36:31,890 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:36:31,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:31,891 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:36:31,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:31,891 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:36:31,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:31,891 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:31,892 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:32,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:32,095 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:32,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:32,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-09-17 02:36:32,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:32,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460394669] [2020-09-17 02:36:32,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:32,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460394669] [2020-09-17 02:36:32,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726077768] [2020-09-17 02:36:32,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:32,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:32,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:32,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:32,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:36:32,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501102860] [2020-09-17 02:36:32,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:32,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:32,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:32,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:32,365 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:36:32,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:32,877 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-09-17 02:36:32,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:36:32,878 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:36:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:32,879 INFO L225 Difference]: With dead ends: 94 [2020-09-17 02:36:32,879 INFO L226 Difference]: Without dead ends: 88 [2020-09-17 02:36:32,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:36:32,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-17 02:36:32,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-09-17 02:36:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:36:32,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:36:32,881 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:36:32,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:32,881 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:36:32,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:32,881 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:36:32,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:32,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:32,882 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:33,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-17 02:36:33,083 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:33,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:33,083 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-09-17 02:36:33,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:33,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758708778] [2020-09-17 02:36:33,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:33,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758708778] [2020-09-17 02:36:33,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915558007] [2020-09-17 02:36:33,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:33,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:33,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:33,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:33,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:33,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:33,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:33,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:36:33,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4082077] [2020-09-17 02:36:33,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:33,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:33,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:33,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:33,346 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:36:33,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:33,996 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-09-17 02:36:33,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:36:33,997 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:36:33,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:33,998 INFO L225 Difference]: With dead ends: 93 [2020-09-17 02:36:33,998 INFO L226 Difference]: Without dead ends: 87 [2020-09-17 02:36:33,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:36:33,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-17 02:36:34,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-09-17 02:36:34,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:36:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:36:34,001 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:36:34,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:34,001 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:36:34,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:34,002 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:36:34,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:34,002 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:34,002 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:34,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:34,203 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:34,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:34,204 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-09-17 02:36:34,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:34,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327888378] [2020-09-17 02:36:34,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:34,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327888378] [2020-09-17 02:36:34,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458833380] [2020-09-17 02:36:34,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:34,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:36:34,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:34,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:34,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:34,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:34,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:36:34,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824246326] [2020-09-17 02:36:34,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:34,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:34,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:34,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:34,466 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:36:35,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:35,027 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-09-17 02:36:35,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:36:35,028 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:36:35,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:35,029 INFO L225 Difference]: With dead ends: 90 [2020-09-17 02:36:35,029 INFO L226 Difference]: Without dead ends: 84 [2020-09-17 02:36:35,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:36:35,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-17 02:36:35,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-09-17 02:36:35,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:36:35,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:36:35,031 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:36:35,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:35,032 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:36:35,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:35,032 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:36:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:35,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:35,033 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:35,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-17 02:36:35,239 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:35,240 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-09-17 02:36:35,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:35,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161786389] [2020-09-17 02:36:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:35,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161786389] [2020-09-17 02:36:35,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821169492] [2020-09-17 02:36:35,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:35,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:35,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:35,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:35,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:35,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:35,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:35,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:36:35,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961598044] [2020-09-17 02:36:35,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:35,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:35,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:35,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:35,549 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:36:36,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:36,249 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-17 02:36:36,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:36:36,250 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:36:36,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:36,251 INFO L225 Difference]: With dead ends: 89 [2020-09-17 02:36:36,251 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 02:36:36,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:36:36,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 02:36:36,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-09-17 02:36:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:36:36,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:36:36,253 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:36:36,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:36,254 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:36:36,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:36,254 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:36:36,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:36,254 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:36,254 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:36,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:36,455 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:36,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:36,456 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-09-17 02:36:36,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:36,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034920580] [2020-09-17 02:36:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:36,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034920580] [2020-09-17 02:36:36,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269449511] [2020-09-17 02:36:36,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:36,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 02:36:36,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:36,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:36,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:36,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:36,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:36:36,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866990398] [2020-09-17 02:36:36,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:36,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:36,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:36,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:36,736 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:36:37,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:37,307 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-09-17 02:36:37,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:36:37,307 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:36:37,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:37,308 INFO L225 Difference]: With dead ends: 86 [2020-09-17 02:36:37,309 INFO L226 Difference]: Without dead ends: 80 [2020-09-17 02:36:37,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:36:37,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-17 02:36:37,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-09-17 02:36:37,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:36:37,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:36:37,314 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:36:37,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:37,314 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:36:37,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:37,314 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:36:37,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:37,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:37,315 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:37,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:37,523 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:37,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:37,524 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-09-17 02:36:37,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:37,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459082744] [2020-09-17 02:36:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:37,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459082744] [2020-09-17 02:36:37,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008863891] [2020-09-17 02:36:37,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:37,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 02:36:37,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:37,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:37,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:37,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:37,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:37,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:36:37,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204616961] [2020-09-17 02:36:37,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:37,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:37,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:37,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:37,820 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:36:38,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:38,691 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-09-17 02:36:38,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:36:38,692 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:36:38,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:38,692 INFO L225 Difference]: With dead ends: 85 [2020-09-17 02:36:38,693 INFO L226 Difference]: Without dead ends: 79 [2020-09-17 02:36:38,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:36:38,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-17 02:36:38,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-09-17 02:36:38,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:36:38,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:36:38,696 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:36:38,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:38,697 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:36:38,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:38,697 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:36:38,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:38,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:38,697 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:38,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:38,898 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:38,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:38,899 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-09-17 02:36:38,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:38,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936016684] [2020-09-17 02:36:38,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:39,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936016684] [2020-09-17 02:36:39,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889727500] [2020-09-17 02:36:39,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:39,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:39,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:39,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:39,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:36:39,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562182719] [2020-09-17 02:36:39,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:39,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:39,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:39,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:39,166 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:36:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:39,848 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-17 02:36:39,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:36:39,849 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:36:39,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:39,850 INFO L225 Difference]: With dead ends: 101 [2020-09-17 02:36:39,851 INFO L226 Difference]: Without dead ends: 95 [2020-09-17 02:36:39,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:36:39,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-17 02:36:39,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-09-17 02:36:39,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 02:36:39,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-09-17 02:36:39,853 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-09-17 02:36:39,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:39,853 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-09-17 02:36:39,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:39,853 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-09-17 02:36:39,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:39,853 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:39,854 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:40,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:40,054 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:40,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:40,055 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-09-17 02:36:40,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:40,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896470217] [2020-09-17 02:36:40,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:40,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896470217] [2020-09-17 02:36:40,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411040300] [2020-09-17 02:36:40,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:40,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:40,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:40,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:40,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:40,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:40,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:40,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:36:40,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319082814] [2020-09-17 02:36:40,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:40,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:40,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:40,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:40,343 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-09-17 02:36:41,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:41,227 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-09-17 02:36:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:36:41,228 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:36:41,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:41,229 INFO L225 Difference]: With dead ends: 82 [2020-09-17 02:36:41,229 INFO L226 Difference]: Without dead ends: 74 [2020-09-17 02:36:41,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:36:41,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-17 02:36:41,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-09-17 02:36:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-17 02:36:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-09-17 02:36:41,235 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-09-17 02:36:41,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:41,235 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-09-17 02:36:41,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-09-17 02:36:41,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:41,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:41,236 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:41,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:41,444 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:41,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:41,444 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-09-17 02:36:41,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:41,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351720826] [2020-09-17 02:36:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:41,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351720826] [2020-09-17 02:36:41,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689311403] [2020-09-17 02:36:41,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:41,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:36:41,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:41,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:41,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:41,697 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:36:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:41,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:41,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:36:41,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789145073] [2020-09-17 02:36:41,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:41,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:41,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:41,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:41,714 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-09-17 02:36:42,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:42,510 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-17 02:36:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:36:42,511 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:36:42,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:42,512 INFO L225 Difference]: With dead ends: 92 [2020-09-17 02:36:42,512 INFO L226 Difference]: Without dead ends: 87 [2020-09-17 02:36:42,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:36:42,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-17 02:36:42,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-09-17 02:36:42,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:36:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-17 02:36:42,515 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-09-17 02:36:42,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:42,515 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-17 02:36:42,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:42,515 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-17 02:36:42,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:42,516 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:42,516 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:42,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:42,717 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:42,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:42,718 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-09-17 02:36:42,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:42,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19759940] [2020-09-17 02:36:42,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:42,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19759940] [2020-09-17 02:36:42,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569685080] [2020-09-17 02:36:42,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:42,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:42,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:42,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:42,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:42,963 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:36:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:42,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:42,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:36:42,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267528216] [2020-09-17 02:36:42,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:36:42,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:42,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:36:42,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:36:42,981 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-09-17 02:36:43,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:43,887 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-09-17 02:36:43,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:36:43,888 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:36:43,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:43,889 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:36:43,889 INFO L226 Difference]: Without dead ends: 73 [2020-09-17 02:36:43,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:36:43,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-17 02:36:43,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-09-17 02:36:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 02:36:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-17 02:36:43,894 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-09-17 02:36:43,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:43,895 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-17 02:36:43,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:36:43,895 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-17 02:36:43,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:43,895 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:43,895 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:44,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-17 02:36:44,104 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:44,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:44,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-09-17 02:36:44,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:44,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989200688] [2020-09-17 02:36:44,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:44,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989200688] [2020-09-17 02:36:44,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580249321] [2020-09-17 02:36:44,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:44,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:36:44,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:44,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:44,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:44,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:44,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:36:44,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552551819] [2020-09-17 02:36:44,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:44,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:44,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:44,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:44,436 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-09-17 02:36:44,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:44,787 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-17 02:36:44,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:36:44,788 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:36:44,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:44,789 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:36:44,789 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 02:36:44,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:36:44,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 02:36:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-17 02:36:44,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:36:44,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-17 02:36:44,791 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-09-17 02:36:44,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:44,792 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-17 02:36:44,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:44,792 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-17 02:36:44,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:44,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:44,792 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:44,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:44,993 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:44,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:44,994 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-09-17 02:36:44,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:44,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025634603] [2020-09-17 02:36:44,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:45,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025634603] [2020-09-17 02:36:45,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130530085] [2020-09-17 02:36:45,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:45,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:36:45,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:45,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:45,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:45,344 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:45,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:45,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:36:45,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344838163] [2020-09-17 02:36:45,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:36:45,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:45,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:36:45,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:36:45,360 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-09-17 02:36:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:45,814 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-09-17 02:36:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:36:45,815 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:36:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:45,816 INFO L225 Difference]: With dead ends: 98 [2020-09-17 02:36:45,816 INFO L226 Difference]: Without dead ends: 92 [2020-09-17 02:36:45,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:36:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-17 02:36:45,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-09-17 02:36:45,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-17 02:36:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-09-17 02:36:45,818 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-09-17 02:36:45,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:45,819 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-09-17 02:36:45,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:36:45,819 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-09-17 02:36:45,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:45,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:45,819 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:46,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-17 02:36:46,020 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:46,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:46,021 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-09-17 02:36:46,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:46,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024996921] [2020-09-17 02:36:46,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:46,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024996921] [2020-09-17 02:36:46,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667809660] [2020-09-17 02:36:46,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:46,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:46,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:46,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:46,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:36:46,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229209901] [2020-09-17 02:36:46,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:46,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:46,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:46,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:46,349 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-09-17 02:36:46,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:46,825 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-17 02:36:46,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:36:46,826 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:36:46,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:46,827 INFO L225 Difference]: With dead ends: 99 [2020-09-17 02:36:46,827 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:36:46,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:36:46,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:36:46,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-09-17 02:36:46,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:36:46,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-09-17 02:36:46,831 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-09-17 02:36:46,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:46,831 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-09-17 02:36:46,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:46,831 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-09-17 02:36:46,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:46,832 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:46,832 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:47,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:47,033 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:47,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:47,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-09-17 02:36:47,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:47,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132878963] [2020-09-17 02:36:47,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:47,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132878963] [2020-09-17 02:36:47,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564806738] [2020-09-17 02:36:47,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:47,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:47,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:47,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:47,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:47,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:47,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:47,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:36:47,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715932725] [2020-09-17 02:36:47,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:36:47,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:47,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:36:47,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:36:47,454 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-09-17 02:36:47,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:47,980 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-09-17 02:36:47,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:36:47,981 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:36:47,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:47,982 INFO L225 Difference]: With dead ends: 109 [2020-09-17 02:36:47,982 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:36:47,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:36:47,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:36:47,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-09-17 02:36:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:36:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-09-17 02:36:47,985 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-09-17 02:36:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:47,986 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-09-17 02:36:47,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:36:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-09-17 02:36:47,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:47,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:47,987 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:48,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:48,196 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:48,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:48,197 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-09-17 02:36:48,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:48,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568561442] [2020-09-17 02:36:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:48,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568561442] [2020-09-17 02:36:48,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726415402] [2020-09-17 02:36:48,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:48,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:36:48,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:48,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:48,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:48,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:48,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:36:48,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661398755] [2020-09-17 02:36:48,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:48,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:48,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:48,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:48,520 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-09-17 02:36:49,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:49,044 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-09-17 02:36:49,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:36:49,045 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:36:49,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:49,046 INFO L225 Difference]: With dead ends: 109 [2020-09-17 02:36:49,046 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:36:49,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:36:49,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:36:49,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-09-17 02:36:49,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-17 02:36:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-09-17 02:36:49,049 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-09-17 02:36:49,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:49,049 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-09-17 02:36:49,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-09-17 02:36:49,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:49,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:49,050 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:49,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-17 02:36:49,255 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:49,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:49,256 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-09-17 02:36:49,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:49,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548691410] [2020-09-17 02:36:49,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:49,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548691410] [2020-09-17 02:36:49,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597042354] [2020-09-17 02:36:49,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:49,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:49,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:49,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:49,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:49,574 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:49,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:49,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:36:49,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244656502] [2020-09-17 02:36:49,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:36:49,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:49,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:36:49,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:36:49,592 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-09-17 02:36:50,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:50,221 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-09-17 02:36:50,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:36:50,222 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:36:50,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:50,223 INFO L225 Difference]: With dead ends: 106 [2020-09-17 02:36:50,223 INFO L226 Difference]: Without dead ends: 100 [2020-09-17 02:36:50,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:36:50,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-17 02:36:50,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-17 02:36:50,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:36:50,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-09-17 02:36:50,231 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-09-17 02:36:50,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:50,231 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-09-17 02:36:50,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:36:50,231 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-09-17 02:36:50,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:50,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:50,232 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:50,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-17 02:36:50,441 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:50,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:50,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-09-17 02:36:50,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:50,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436316929] [2020-09-17 02:36:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:50,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436316929] [2020-09-17 02:36:50,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653778505] [2020-09-17 02:36:50,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:50,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:36:50,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:50,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:50,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:50,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:50,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:36:50,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732700161] [2020-09-17 02:36:50,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:50,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:50,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:50,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:50,707 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-09-17 02:36:51,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:51,298 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-09-17 02:36:51,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:36:51,298 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:36:51,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:51,299 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:36:51,300 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:36:51,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:36:51,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:36:51,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-17 02:36:51,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-17 02:36:51,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-09-17 02:36:51,303 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-09-17 02:36:51,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:51,303 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-09-17 02:36:51,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:51,304 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-09-17 02:36:51,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:51,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:51,304 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:51,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:51,506 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:51,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:51,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-09-17 02:36:51,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:51,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61653219] [2020-09-17 02:36:51,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:51,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61653219] [2020-09-17 02:36:51,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407737759] [2020-09-17 02:36:51,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:51,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:36:51,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:51,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:51,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:51,812 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:51,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:51,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:36:51,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724628227] [2020-09-17 02:36:51,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:36:51,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:51,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:36:51,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:36:51,828 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-09-17 02:36:52,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:52,566 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-09-17 02:36:52,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:36:52,567 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:36:52,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:52,568 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:36:52,568 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:36:52,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:36:52,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:36:52,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-09-17 02:36:52,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:36:52,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-09-17 02:36:52,572 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-09-17 02:36:52,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:52,572 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-09-17 02:36:52,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:36:52,572 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-09-17 02:36:52,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:52,573 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:52,573 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:52,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-17 02:36:52,781 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:52,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:52,782 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-09-17 02:36:52,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:52,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359539915] [2020-09-17 02:36:52,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:52,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359539915] [2020-09-17 02:36:52,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989135340] [2020-09-17 02:36:52,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:53,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:53,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:53,074 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:53,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:53,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:36:53,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956962979] [2020-09-17 02:36:53,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:53,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:53,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:53,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:53,076 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-09-17 02:36:53,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:53,720 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-09-17 02:36:53,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:36:53,721 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:36:53,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:53,722 INFO L225 Difference]: With dead ends: 105 [2020-09-17 02:36:53,722 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 02:36:53,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:36:53,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 02:36:53,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-09-17 02:36:53,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:36:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:36:53,727 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-09-17 02:36:53,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:53,727 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:36:53,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:53,728 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:36:53,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:53,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:53,728 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:53,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:53,939 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:53,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:53,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-09-17 02:36:53,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:53,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074908094] [2020-09-17 02:36:53,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:54,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074908094] [2020-09-17 02:36:54,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089112817] [2020-09-17 02:36:54,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:54,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:54,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:54,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:54,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:54,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:54,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:54,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:36:54,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904674368] [2020-09-17 02:36:54,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:36:54,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:54,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:36:54,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:36:54,242 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-09-17 02:36:55,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:55,066 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-09-17 02:36:55,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:36:55,067 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:36:55,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:55,068 INFO L225 Difference]: With dead ends: 102 [2020-09-17 02:36:55,068 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 02:36:55,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:36:55,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 02:36:55,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-09-17 02:36:55,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:36:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:36:55,071 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-09-17 02:36:55,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:55,071 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:36:55,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:36:55,071 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:36:55,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:55,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:55,072 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:55,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-17 02:36:55,272 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:55,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:55,273 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-09-17 02:36:55,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:55,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595185079] [2020-09-17 02:36:55,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:55,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595185079] [2020-09-17 02:36:55,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277687260] [2020-09-17 02:36:55,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:55,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:36:55,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:55,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:55,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:55,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:55,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:36:55,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191180611] [2020-09-17 02:36:55,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:55,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:55,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:55,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:55,567 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-09-17 02:36:56,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:56,315 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-09-17 02:36:56,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:36:56,316 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:36:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:56,317 INFO L225 Difference]: With dead ends: 103 [2020-09-17 02:36:56,318 INFO L226 Difference]: Without dead ends: 97 [2020-09-17 02:36:56,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:36:56,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-17 02:36:56,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-09-17 02:36:56,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-17 02:36:56,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-09-17 02:36:56,320 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-09-17 02:36:56,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:56,320 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-09-17 02:36:56,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:56,321 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-09-17 02:36:56,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:56,321 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:56,321 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:56,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:56,522 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:56,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:56,523 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-09-17 02:36:56,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:56,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090709868] [2020-09-17 02:36:56,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:56,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090709868] [2020-09-17 02:36:56,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621419174] [2020-09-17 02:36:56,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:56,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:56,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:56,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:56,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:56,815 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:56,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:56,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:36:56,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987540279] [2020-09-17 02:36:56,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:36:56,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:56,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:36:56,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:36:56,832 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-09-17 02:36:57,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:57,757 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-09-17 02:36:57,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:36:57,758 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:36:57,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:57,759 INFO L225 Difference]: With dead ends: 100 [2020-09-17 02:36:57,759 INFO L226 Difference]: Without dead ends: 94 [2020-09-17 02:36:57,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:36:57,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-17 02:36:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-09-17 02:36:57,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:36:57,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-17 02:36:57,762 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-09-17 02:36:57,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:57,762 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-17 02:36:57,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:36:57,762 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-17 02:36:57,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:57,763 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:57,763 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:57,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-17 02:36:57,971 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:57,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:57,972 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-09-17 02:36:57,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:57,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711577785] [2020-09-17 02:36:57,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:58,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711577785] [2020-09-17 02:36:58,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019090424] [2020-09-17 02:36:58,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:58,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:36:58,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:58,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:58,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:58,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:58,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:36:58,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376559446] [2020-09-17 02:36:58,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:58,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:58,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:58,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:58,259 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-09-17 02:36:59,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:59,110 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-17 02:36:59,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:36:59,111 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:36:59,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:59,112 INFO L225 Difference]: With dead ends: 120 [2020-09-17 02:36:59,112 INFO L226 Difference]: Without dead ends: 114 [2020-09-17 02:36:59,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:36:59,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-17 02:36:59,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-09-17 02:36:59,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:36:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-09-17 02:36:59,118 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-09-17 02:36:59,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:59,119 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-09-17 02:36:59,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:59,119 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-09-17 02:36:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:59,120 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:59,120 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:59,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-17 02:36:59,321 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:59,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:59,321 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-09-17 02:36:59,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:59,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761186596] [2020-09-17 02:36:59,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:59,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761186596] [2020-09-17 02:36:59,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536956589] [2020-09-17 02:36:59,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:59,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:36:59,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:59,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:59,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:59,629 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:59,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:59,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:36:59,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708118478] [2020-09-17 02:36:59,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:36:59,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:59,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:36:59,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:36:59,645 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-09-17 02:37:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:00,580 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-09-17 02:37:00,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:37:00,581 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:37:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:00,582 INFO L225 Difference]: With dead ends: 101 [2020-09-17 02:37:00,582 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:37:00,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:37:00,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:37:00,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-09-17 02:37:00,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 02:37:00,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-09-17 02:37:00,585 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-09-17 02:37:00,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:00,585 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-09-17 02:37:00,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:37:00,585 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-09-17 02:37:00,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:00,585 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:00,586 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:00,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:00,787 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:00,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:00,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-09-17 02:37:00,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:00,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660511030] [2020-09-17 02:37:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:01,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660511030] [2020-09-17 02:37:01,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992434487] [2020-09-17 02:37:01,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:01,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:01,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:01,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:01,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:37:01,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181854506] [2020-09-17 02:37:01,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:37:01,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:01,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:37:01,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:37:01,141 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-09-17 02:37:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:01,608 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-09-17 02:37:01,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:37:01,609 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:37:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:01,610 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:37:01,610 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:37:01,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:37:01,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:37:01,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-09-17 02:37:01,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:37:01,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:37:01,612 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:37:01,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:01,612 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:37:01,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:37:01,612 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:37:01,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:01,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:01,613 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:01,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:01,817 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:01,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:01,818 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-09-17 02:37:01,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:01,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190507839] [2020-09-17 02:37:01,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:02,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190507839] [2020-09-17 02:37:02,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861789874] [2020-09-17 02:37:02,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:02,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:37:02,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:02,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:02,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:02,178 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:02,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:02,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:37:02,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296164036] [2020-09-17 02:37:02,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:02,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:02,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:02,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:02,192 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:37:02,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:02,764 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-09-17 02:37:02,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:37:02,765 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:37:02,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:02,766 INFO L225 Difference]: With dead ends: 111 [2020-09-17 02:37:02,766 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 02:37:02,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:37:02,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 02:37:02,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-17 02:37:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:37:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:37:02,769 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:37:02,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:02,769 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:37:02,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:02,769 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:37:02,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:02,770 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:02,770 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:02,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-17 02:37:02,971 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:02,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:02,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-09-17 02:37:02,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:02,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410660562] [2020-09-17 02:37:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:03,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410660562] [2020-09-17 02:37:03,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074398006] [2020-09-17 02:37:03,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:03,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:37:03,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:03,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:03,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:03,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:03,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:37:03,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681614091] [2020-09-17 02:37:03,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:37:03,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:03,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:37:03,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:37:03,326 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:37:03,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:03,856 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-17 02:37:03,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:37:03,857 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:37:03,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:03,858 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:37:03,858 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 02:37:03,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:37:03,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 02:37:03,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-09-17 02:37:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:37:03,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:37:03,860 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:37:03,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:03,860 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:37:03,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:37:03,860 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:37:03,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:03,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:03,861 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:04,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:04,067 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:04,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:04,068 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-09-17 02:37:04,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:04,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33503915] [2020-09-17 02:37:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:04,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33503915] [2020-09-17 02:37:04,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077319661] [2020-09-17 02:37:04,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:04,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:37:04,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:04,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:04,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:04,430 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:04,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:04,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:37:04,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886371480] [2020-09-17 02:37:04,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:04,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:04,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:04,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:04,445 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:37:05,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:05,119 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-09-17 02:37:05,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:37:05,120 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:37:05,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:05,121 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:37:05,121 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:37:05,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:37:05,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:37:05,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-09-17 02:37:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:37:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:37:05,124 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:37:05,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:05,125 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:37:05,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:37:05,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:05,125 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:05,125 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:05,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-17 02:37:05,326 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:05,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:05,327 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-09-17 02:37:05,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:05,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307652875] [2020-09-17 02:37:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:05,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307652875] [2020-09-17 02:37:05,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501198024] [2020-09-17 02:37:05,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:05,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:37:05,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:05,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:05,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:05,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:05,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:37:05,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241827582] [2020-09-17 02:37:05,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:37:05,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:05,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:37:05,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:37:05,664 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:37:06,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:06,269 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-17 02:37:06,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:37:06,270 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:37:06,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:06,271 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:37:06,271 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:37:06,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:37:06,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:37:06,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-09-17 02:37:06,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:37:06,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:37:06,274 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:37:06,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:06,275 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:37:06,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:37:06,275 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:37:06,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:06,275 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:06,275 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:06,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-17 02:37:06,477 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:06,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:06,478 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-09-17 02:37:06,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:06,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791460094] [2020-09-17 02:37:06,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:06,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791460094] [2020-09-17 02:37:06,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903537709] [2020-09-17 02:37:06,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:06,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:37:06,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:06,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:06,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:06,835 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:06,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:06,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:37:06,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105109912] [2020-09-17 02:37:06,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:06,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:06,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:06,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:06,850 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:37:07,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:07,610 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-17 02:37:07,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:37:07,611 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:37:07,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:07,611 INFO L225 Difference]: With dead ends: 103 [2020-09-17 02:37:07,611 INFO L226 Difference]: Without dead ends: 97 [2020-09-17 02:37:07,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:37:07,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-17 02:37:07,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-09-17 02:37:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:37:07,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:37:07,614 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:37:07,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:07,615 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:37:07,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:07,615 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:37:07,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:07,616 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:07,616 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:07,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-17 02:37:07,823 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:07,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:07,823 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-09-17 02:37:07,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:07,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366475215] [2020-09-17 02:37:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:08,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366475215] [2020-09-17 02:37:08,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238207911] [2020-09-17 02:37:08,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:08,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:08,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:08,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:08,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:37:08,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502449900] [2020-09-17 02:37:08,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:37:08,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:08,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:37:08,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:37:08,098 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:37:08,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:08,768 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-09-17 02:37:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:37:08,769 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:37:08,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:08,770 INFO L225 Difference]: With dead ends: 100 [2020-09-17 02:37:08,770 INFO L226 Difference]: Without dead ends: 94 [2020-09-17 02:37:08,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:37:08,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-17 02:37:08,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-09-17 02:37:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:37:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:37:08,773 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:37:08,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:08,773 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:37:08,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:37:08,773 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:37:08,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:08,774 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:08,774 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:08,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:08,984 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:08,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:08,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-09-17 02:37:08,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:08,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558307492] [2020-09-17 02:37:08,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:09,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558307492] [2020-09-17 02:37:09,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044286183] [2020-09-17 02:37:09,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:09,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:37:09,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:09,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:09,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:09,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:09,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:09,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:37:09,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459352597] [2020-09-17 02:37:09,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:09,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:09,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:09,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:09,337 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:37:10,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:10,205 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-17 02:37:10,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:37:10,206 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:37:10,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:10,207 INFO L225 Difference]: With dead ends: 99 [2020-09-17 02:37:10,207 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:37:10,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:37:10,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:37:10,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-09-17 02:37:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:37:10,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:37:10,209 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:37:10,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:10,210 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:37:10,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:10,210 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:37:10,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:10,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:10,210 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:10,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-17 02:37:10,411 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:10,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:10,412 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-09-17 02:37:10,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:10,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644083736] [2020-09-17 02:37:10,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:10,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644083736] [2020-09-17 02:37:10,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612492399] [2020-09-17 02:37:10,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:10,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:37:10,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:10,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:10,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:10,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:10,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:37:10,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083242342] [2020-09-17 02:37:10,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:37:10,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:10,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:37:10,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:37:10,737 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:37:11,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:11,475 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-09-17 02:37:11,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:37:11,475 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:37:11,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:11,476 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:37:11,476 INFO L226 Difference]: Without dead ends: 90 [2020-09-17 02:37:11,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:37:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-17 02:37:11,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-09-17 02:37:11,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:37:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:37:11,480 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:37:11,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:11,480 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:37:11,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:37:11,480 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:37:11,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:11,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:11,481 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:11,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:11,684 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:11,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:11,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-09-17 02:37:11,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:11,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126310595] [2020-09-17 02:37:11,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:11,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126310595] [2020-09-17 02:37:11,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910093993] [2020-09-17 02:37:11,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:11,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:37:11,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:11,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:11,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:12,007 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:12,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:12,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:37:12,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900266985] [2020-09-17 02:37:12,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:12,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:12,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:12,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:12,026 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:37:13,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:13,000 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-17 02:37:13,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:37:13,001 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:37:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:13,001 INFO L225 Difference]: With dead ends: 95 [2020-09-17 02:37:13,002 INFO L226 Difference]: Without dead ends: 89 [2020-09-17 02:37:13,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:37:13,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-17 02:37:13,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-09-17 02:37:13,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:37:13,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:37:13,004 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:37:13,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:13,005 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:37:13,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:13,005 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:37:13,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:13,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:13,005 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:13,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:13,206 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:13,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:13,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-09-17 02:37:13,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:13,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273057623] [2020-09-17 02:37:13,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:13,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273057623] [2020-09-17 02:37:13,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380343063] [2020-09-17 02:37:13,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:13,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:37:13,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:13,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:13,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:13,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:13,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:37:13,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126481387] [2020-09-17 02:37:13,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:37:13,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:13,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:37:13,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:37:13,502 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:37:14,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:14,312 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-17 02:37:14,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:37:14,313 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:37:14,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:14,314 INFO L225 Difference]: With dead ends: 92 [2020-09-17 02:37:14,314 INFO L226 Difference]: Without dead ends: 86 [2020-09-17 02:37:14,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:37:14,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-17 02:37:14,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-09-17 02:37:14,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:37:14,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:37:14,317 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:37:14,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:14,317 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:37:14,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:37:14,317 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:37:14,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:14,318 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:14,318 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:14,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:14,525 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:14,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:14,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-09-17 02:37:14,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:14,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552431908] [2020-09-17 02:37:14,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:14,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552431908] [2020-09-17 02:37:14,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666242628] [2020-09-17 02:37:14,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:14,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:37:14,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:14,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:14,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:14,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:14,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:14,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:37:14,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534163375] [2020-09-17 02:37:14,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:14,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:14,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:14,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:14,857 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:37:16,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:16,162 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-09-17 02:37:16,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:37:16,163 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:37:16,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:16,164 INFO L225 Difference]: With dead ends: 91 [2020-09-17 02:37:16,164 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:37:16,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:37:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:37:16,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-09-17 02:37:16,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:37:16,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:37:16,168 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:37:16,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:16,168 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:37:16,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:16,169 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:37:16,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:16,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:16,170 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:16,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:16,381 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:16,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:16,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-09-17 02:37:16,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:16,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216965771] [2020-09-17 02:37:16,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:16,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216965771] [2020-09-17 02:37:16,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351288259] [2020-09-17 02:37:16,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:16,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:16,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:16,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:16,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:37:16,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160960796] [2020-09-17 02:37:16,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:37:16,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:16,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:37:16,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:37:16,693 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:37:17,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:17,567 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-17 02:37:17,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:37:17,568 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:37:17,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:17,569 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:37:17,569 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:37:17,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:37:17,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:37:17,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-09-17 02:37:17,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:37:17,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-09-17 02:37:17,572 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-09-17 02:37:17,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:17,572 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-09-17 02:37:17,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:37:17,572 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-09-17 02:37:17,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:17,572 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:17,572 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:17,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-17 02:37:17,773 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:17,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:17,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-09-17 02:37:17,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:17,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634900346] [2020-09-17 02:37:17,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:17,998 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:17,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634900346] [2020-09-17 02:37:17,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548058000] [2020-09-17 02:37:17,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:18,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:37:18,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:18,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:18,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:18,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:18,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:37:18,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521238854] [2020-09-17 02:37:18,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:18,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:18,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:18,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:18,107 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-09-17 02:37:19,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:19,151 INFO L93 Difference]: Finished difference Result 86 states and 213 transitions. [2020-09-17 02:37:19,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:37:19,152 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:37:19,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:19,152 INFO L225 Difference]: With dead ends: 86 [2020-09-17 02:37:19,153 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 02:37:19,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=587, Invalid=1483, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:37:19,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 02:37:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-17 02:37:19,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:37:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-09-17 02:37:19,155 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-09-17 02:37:19,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:19,156 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-09-17 02:37:19,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:19,156 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-09-17 02:37:19,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:19,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:19,156 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:19,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-17 02:37:19,357 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:19,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:19,358 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-09-17 02:37:19,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:19,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141927602] [2020-09-17 02:37:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:19,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141927602] [2020-09-17 02:37:19,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143605392] [2020-09-17 02:37:19,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:19,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:37:19,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:19,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:19,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:19,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:37:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:19,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:19,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:37:19,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139034039] [2020-09-17 02:37:19,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:19,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:19,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:19,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:19,706 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-09-17 02:37:20,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:20,750 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-09-17 02:37:20,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:37:20,751 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:37:20,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:20,752 INFO L225 Difference]: With dead ends: 100 [2020-09-17 02:37:20,752 INFO L226 Difference]: Without dead ends: 95 [2020-09-17 02:37:20,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:37:20,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-17 02:37:20,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-09-17 02:37:20,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:37:20,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-17 02:37:20,755 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-09-17 02:37:20,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:20,755 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-17 02:37:20,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:20,755 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-17 02:37:20,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:20,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:20,756 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:20,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-17 02:37:20,957 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:20,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:20,958 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-09-17 02:37:20,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:20,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096778086] [2020-09-17 02:37:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:21,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096778086] [2020-09-17 02:37:21,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129868510] [2020-09-17 02:37:21,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:21,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:37:21,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:21,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:21,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:21,291 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:37:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:21,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:21,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:37:21,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825979202] [2020-09-17 02:37:21,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:21,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:21,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:21,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:21,316 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-09-17 02:37:22,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:22,436 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-09-17 02:37:22,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:37:22,437 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:37:22,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:22,438 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:37:22,438 INFO L226 Difference]: Without dead ends: 79 [2020-09-17 02:37:22,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:37:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-17 02:37:22,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-09-17 02:37:22,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:37:22,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-17 02:37:22,441 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-09-17 02:37:22,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:22,441 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-17 02:37:22,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:22,441 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-17 02:37:22,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:22,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:22,441 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:22,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-17 02:37:22,642 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:22,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:22,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-09-17 02:37:22,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:22,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439941322] [2020-09-17 02:37:22,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:22,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439941322] [2020-09-17 02:37:22,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70446826] [2020-09-17 02:37:22,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:23,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:37:23,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:23,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:23,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:23,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:23,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:37:23,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481660264] [2020-09-17 02:37:23,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:23,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:23,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:23,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:23,038 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-09-17 02:37:23,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:23,486 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-09-17 02:37:23,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:37:23,487 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:37:23,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:23,488 INFO L225 Difference]: With dead ends: 90 [2020-09-17 02:37:23,488 INFO L226 Difference]: Without dead ends: 84 [2020-09-17 02:37:23,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:37:23,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-17 02:37:23,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-17 02:37:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:37:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-17 02:37:23,490 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-09-17 02:37:23,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:23,490 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-17 02:37:23,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:23,490 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-17 02:37:23,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:23,491 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:23,491 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:23,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:23,695 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:23,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:23,696 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-09-17 02:37:23,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:23,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418085723] [2020-09-17 02:37:23,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:24,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418085723] [2020-09-17 02:37:24,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807894718] [2020-09-17 02:37:24,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:24,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:37:24,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:24,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:24,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:24,109 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:24,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:24,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:37:24,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115947721] [2020-09-17 02:37:24,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:24,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:24,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:24,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:24,124 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-09-17 02:37:24,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:24,708 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-09-17 02:37:24,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:37:24,709 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:37:24,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:24,710 INFO L225 Difference]: With dead ends: 106 [2020-09-17 02:37:24,710 INFO L226 Difference]: Without dead ends: 100 [2020-09-17 02:37:24,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:37:24,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-17 02:37:24,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-17 02:37:24,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:37:24,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-09-17 02:37:24,713 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-09-17 02:37:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:24,713 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-09-17 02:37:24,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:24,714 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-09-17 02:37:24,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:24,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:24,714 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:24,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-17 02:37:24,923 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:24,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:24,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-09-17 02:37:24,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:24,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213100371] [2020-09-17 02:37:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:25,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213100371] [2020-09-17 02:37:25,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422036395] [2020-09-17 02:37:25,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:25,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:25,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:25,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:25,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:37:25,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618200921] [2020-09-17 02:37:25,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:25,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:25,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:25,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:25,306 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-09-17 02:37:25,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:25,910 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-09-17 02:37:25,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:37:25,911 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:37:25,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:25,912 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:37:25,912 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:37:25,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:37:25,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:37:25,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-17 02:37:25,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-17 02:37:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-09-17 02:37:25,915 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-09-17 02:37:25,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:25,915 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-09-17 02:37:25,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:25,916 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-09-17 02:37:25,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:25,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:25,916 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:26,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-17 02:37:26,124 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:26,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:26,125 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-09-17 02:37:26,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:26,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73457803] [2020-09-17 02:37:26,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:26,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73457803] [2020-09-17 02:37:26,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962684944] [2020-09-17 02:37:26,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:26,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:37:26,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:26,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:26,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:26,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:26,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:26,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:37:26,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892556996] [2020-09-17 02:37:26,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:26,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:26,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:26,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:26,556 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-09-17 02:37:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:27,204 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-09-17 02:37:27,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:37:27,205 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:37:27,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:27,206 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:37:27,206 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:37:27,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:37:27,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:37:27,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-09-17 02:37:27,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:37:27,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-09-17 02:37:27,209 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-09-17 02:37:27,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:27,210 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-09-17 02:37:27,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:27,210 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-09-17 02:37:27,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:27,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:27,211 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:27,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-17 02:37:27,412 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:27,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:27,412 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-09-17 02:37:27,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:27,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005752574] [2020-09-17 02:37:27,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:27,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005752574] [2020-09-17 02:37:27,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934330524] [2020-09-17 02:37:27,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:27,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:37:27,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:27,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:27,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:27,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:27,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:37:27,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530250109] [2020-09-17 02:37:27,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:27,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:27,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:27,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:27,791 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-09-17 02:37:28,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:28,460 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-09-17 02:37:28,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:37:28,461 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:37:28,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:28,462 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:37:28,462 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:37:28,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:37:28,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:37:28,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-09-17 02:37:28,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:37:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-09-17 02:37:28,465 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-09-17 02:37:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:28,465 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-09-17 02:37:28,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:28,465 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-09-17 02:37:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:28,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:28,466 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:28,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:28,674 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:28,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:28,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-09-17 02:37:28,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:28,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761509180] [2020-09-17 02:37:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:28,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761509180] [2020-09-17 02:37:28,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826049677] [2020-09-17 02:37:28,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:29,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:37:29,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:29,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:29,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:29,059 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:29,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:29,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:37:29,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893541320] [2020-09-17 02:37:29,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:29,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:29,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:29,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:29,073 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-09-17 02:37:29,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:29,846 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-09-17 02:37:29,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:37:29,847 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:37:29,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:29,848 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:37:29,848 INFO L226 Difference]: Without dead ends: 110 [2020-09-17 02:37:29,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:37:29,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-17 02:37:29,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-09-17 02:37:29,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:37:29,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-09-17 02:37:29,851 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-09-17 02:37:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:29,851 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-09-17 02:37:29,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:29,851 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-09-17 02:37:29,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:29,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:29,852 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:30,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:30,053 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:30,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:30,054 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-09-17 02:37:30,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:30,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910657148] [2020-09-17 02:37:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:30,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910657148] [2020-09-17 02:37:30,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256642299] [2020-09-17 02:37:30,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:30,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:37:30,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:30,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:30,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:30,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:30,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:37:30,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293242241] [2020-09-17 02:37:30,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:30,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:30,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:30,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:30,426 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-09-17 02:37:31,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:31,160 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-09-17 02:37:31,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:37:31,160 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:37:31,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:31,161 INFO L225 Difference]: With dead ends: 117 [2020-09-17 02:37:31,161 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 02:37:31,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:37:31,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 02:37:31,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-09-17 02:37:31,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-17 02:37:31,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-09-17 02:37:31,164 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-09-17 02:37:31,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:31,164 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-09-17 02:37:31,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:31,164 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-09-17 02:37:31,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:31,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:31,165 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:31,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:31,365 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:31,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:31,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-09-17 02:37:31,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:31,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589440378] [2020-09-17 02:37:31,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:31,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589440378] [2020-09-17 02:37:31,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156652524] [2020-09-17 02:37:31,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:31,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:37:31,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:31,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:31,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:31,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:31,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:31,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:37:31,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837071042] [2020-09-17 02:37:31,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:31,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:31,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:31,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:31,757 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-09-17 02:37:32,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:32,600 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-09-17 02:37:32,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:37:32,601 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:37:32,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:32,602 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:37:32,602 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:37:32,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:37:32,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:37:32,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-09-17 02:37:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:37:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-09-17 02:37:32,605 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-09-17 02:37:32,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:32,605 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-09-17 02:37:32,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:32,606 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-09-17 02:37:32,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:32,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:32,606 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:32,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-17 02:37:32,816 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:32,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:32,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-09-17 02:37:32,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:32,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897584955] [2020-09-17 02:37:32,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:33,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897584955] [2020-09-17 02:37:33,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276444678] [2020-09-17 02:37:33,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:33,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:33,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:33,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:33,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:37:33,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632960722] [2020-09-17 02:37:33,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:33,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:33,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:33,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:33,178 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-09-17 02:37:33,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:33,969 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-09-17 02:37:33,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:37:33,970 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:37:33,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:33,970 INFO L225 Difference]: With dead ends: 115 [2020-09-17 02:37:33,970 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:37:33,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:37:33,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:37:33,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-09-17 02:37:33,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 02:37:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-09-17 02:37:33,974 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-09-17 02:37:33,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:33,974 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-09-17 02:37:33,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:33,975 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-09-17 02:37:33,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:33,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:33,975 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:34,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:34,181 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:34,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:34,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-09-17 02:37:34,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:34,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866661763] [2020-09-17 02:37:34,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:34,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866661763] [2020-09-17 02:37:34,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696538647] [2020-09-17 02:37:34,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:34,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:37:34,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:34,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:34,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:34,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:34,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:34,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:37:34,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143024752] [2020-09-17 02:37:34,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:34,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:34,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:34,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:34,563 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-09-17 02:37:35,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:35,534 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-09-17 02:37:35,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:37:35,535 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:37:35,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:35,536 INFO L225 Difference]: With dead ends: 112 [2020-09-17 02:37:35,536 INFO L226 Difference]: Without dead ends: 106 [2020-09-17 02:37:35,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:37:35,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-17 02:37:35,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-09-17 02:37:35,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 02:37:35,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-09-17 02:37:35,538 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-09-17 02:37:35,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:35,538 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-09-17 02:37:35,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:35,538 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-09-17 02:37:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:35,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:35,539 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:35,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-17 02:37:35,747 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:35,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:35,748 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-09-17 02:37:35,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:35,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740392882] [2020-09-17 02:37:35,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:36,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740392882] [2020-09-17 02:37:36,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092000453] [2020-09-17 02:37:36,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:36,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:37:36,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:36,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:36,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:36,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:36,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:37:36,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300185052] [2020-09-17 02:37:36,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:36,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:36,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:36,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:36,093 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-09-17 02:37:36,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:36,955 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-09-17 02:37:36,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:37:36,956 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:37:36,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:36,957 INFO L225 Difference]: With dead ends: 113 [2020-09-17 02:37:36,957 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 02:37:36,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:37:36,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 02:37:36,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-09-17 02:37:36,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:37:36,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:37:36,960 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-09-17 02:37:36,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:36,961 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:37:36,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:36,961 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:37:36,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:36,961 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:36,961 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:37,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-17 02:37:37,162 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:37,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:37,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-09-17 02:37:37,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:37,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700397606] [2020-09-17 02:37:37,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:37,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700397606] [2020-09-17 02:37:37,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613031953] [2020-09-17 02:37:37,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:37,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:37:37,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:37,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:37,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:37,523 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:37,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:37,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:37:37,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542924211] [2020-09-17 02:37:37,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:37,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:37,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:37,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:37,541 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-09-17 02:37:38,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:38,605 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-09-17 02:37:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:37:38,607 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:37:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:38,607 INFO L225 Difference]: With dead ends: 110 [2020-09-17 02:37:38,607 INFO L226 Difference]: Without dead ends: 104 [2020-09-17 02:37:38,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:37:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-17 02:37:38,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-09-17 02:37:38,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:37:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:37:38,610 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-09-17 02:37:38,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:38,611 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:37:38,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:38,611 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:37:38,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:38,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:38,611 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:38,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-17 02:37:38,812 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:38,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:38,813 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-09-17 02:37:38,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:38,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038543485] [2020-09-17 02:37:38,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:39,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038543485] [2020-09-17 02:37:39,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097074847] [2020-09-17 02:37:39,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:39,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:37:39,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:39,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:39,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:39,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:39,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:37:39,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074793642] [2020-09-17 02:37:39,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:39,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:39,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:39,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:39,162 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-09-17 02:37:40,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:40,118 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-09-17 02:37:40,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:37:40,119 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:37:40,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:40,120 INFO L225 Difference]: With dead ends: 111 [2020-09-17 02:37:40,120 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 02:37:40,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:37:40,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 02:37:40,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-09-17 02:37:40,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 02:37:40,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-09-17 02:37:40,122 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-09-17 02:37:40,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:40,122 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-09-17 02:37:40,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:40,123 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-09-17 02:37:40,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:40,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:40,123 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:40,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:40,324 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:40,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:40,325 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-09-17 02:37:40,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:40,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726242854] [2020-09-17 02:37:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:40,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726242854] [2020-09-17 02:37:40,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558516995] [2020-09-17 02:37:40,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:40,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:37:40,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:40,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:40,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:40,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:40,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:40,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:37:40,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332504922] [2020-09-17 02:37:40,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:40,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:40,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:40,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:40,689 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-09-17 02:37:41,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:41,854 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-09-17 02:37:41,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:37:41,855 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:37:41,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:41,856 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:37:41,856 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 02:37:41,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:37:41,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 02:37:41,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-09-17 02:37:41,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:37:41,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-17 02:37:41,860 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-09-17 02:37:41,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:41,860 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-17 02:37:41,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:41,861 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-17 02:37:41,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:41,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:41,861 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:42,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-17 02:37:42,064 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:42,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:42,065 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-09-17 02:37:42,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:42,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242597551] [2020-09-17 02:37:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:42,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242597551] [2020-09-17 02:37:42,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841002187] [2020-09-17 02:37:42,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:42,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:42,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:42,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:42,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:37:42,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144965506] [2020-09-17 02:37:42,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:42,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:42,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:42,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:42,387 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-09-17 02:37:43,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:43,367 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-09-17 02:37:43,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:37:43,368 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:37:43,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:43,369 INFO L225 Difference]: With dead ends: 128 [2020-09-17 02:37:43,369 INFO L226 Difference]: Without dead ends: 122 [2020-09-17 02:37:43,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:37:43,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-17 02:37:43,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-09-17 02:37:43,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:37:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-09-17 02:37:43,371 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-09-17 02:37:43,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:43,371 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-09-17 02:37:43,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:43,372 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-09-17 02:37:43,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:43,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:43,372 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:43,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:43,574 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:43,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:43,575 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-09-17 02:37:43,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:43,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330156987] [2020-09-17 02:37:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:43,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330156987] [2020-09-17 02:37:43,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85720818] [2020-09-17 02:37:43,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:43,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:37:43,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:43,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:43,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:43,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:43,934 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:43,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:43,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:37:43,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833342500] [2020-09-17 02:37:43,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:43,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:43,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:43,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:43,936 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-09-17 02:37:45,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:45,154 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-09-17 02:37:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:37:45,155 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:37:45,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:45,156 INFO L225 Difference]: With dead ends: 109 [2020-09-17 02:37:45,156 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:37:45,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:37:45,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:37:45,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-09-17 02:37:45,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 02:37:45,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-09-17 02:37:45,158 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-09-17 02:37:45,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:45,158 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-09-17 02:37:45,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:45,158 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-09-17 02:37:45,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:45,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:45,158 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:45,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:45,359 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:45,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:45,360 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-09-17 02:37:45,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:45,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057184234] [2020-09-17 02:37:45,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:45,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057184234] [2020-09-17 02:37:45,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280487889] [2020-09-17 02:37:45,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:45,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:37:45,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:45,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:45,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:45,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:45,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:37:45,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808057353] [2020-09-17 02:37:45,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:45,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:45,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:45,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:45,796 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-09-17 02:37:46,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:46,375 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-09-17 02:37:46,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:37:46,376 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:37:46,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:46,377 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:37:46,377 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:37:46,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:37:46,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:37:46,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-09-17 02:37:46,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:37:46,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:37:46,380 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:37:46,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:46,380 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:37:46,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:46,380 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:37:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:46,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:46,381 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:46,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:46,583 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:46,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:46,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-09-17 02:37:46,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:46,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954022448] [2020-09-17 02:37:46,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:46,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954022448] [2020-09-17 02:37:46,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630086495] [2020-09-17 02:37:46,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:47,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:37:47,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:47,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:47,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:47,034 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:47,048 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:47,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:47,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:37:47,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903417658] [2020-09-17 02:37:47,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:37:47,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:47,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:37:47,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:37:47,050 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:37:47,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:47,713 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-17 02:37:47,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:37:47,714 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:37:47,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:47,715 INFO L225 Difference]: With dead ends: 121 [2020-09-17 02:37:47,715 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 02:37:47,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:37:47,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 02:37:47,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-09-17 02:37:47,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:37:47,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:37:47,717 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:37:47,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:47,718 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:37:47,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:37:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:37:47,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:47,718 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:47,718 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:47,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:47,919 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:47,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:47,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-09-17 02:37:47,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:47,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430321811] [2020-09-17 02:37:47,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:48,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430321811] [2020-09-17 02:37:48,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154986565] [2020-09-17 02:37:48,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:48,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:37:48,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:48,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:48,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:48,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:48,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:37:48,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677443010] [2020-09-17 02:37:48,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:48,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:48,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:48,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:48,336 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:37:48,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:48,969 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-17 02:37:48,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:37:48,970 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:37:48,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:48,970 INFO L225 Difference]: With dead ends: 118 [2020-09-17 02:37:48,971 INFO L226 Difference]: Without dead ends: 112 [2020-09-17 02:37:48,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:37:48,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-17 02:37:48,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-09-17 02:37:48,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:37:48,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:37:48,974 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:37:48,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:48,974 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:37:48,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:48,974 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:37:48,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:48,974 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:48,975 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:49,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:49,176 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:49,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:49,176 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-09-17 02:37:49,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:49,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985021662] [2020-09-17 02:37:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:49,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985021662] [2020-09-17 02:37:49,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504243207] [2020-09-17 02:37:49,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:49,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:37:49,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:49,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:49,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:49,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:49,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:49,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:37:49,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257736540] [2020-09-17 02:37:49,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:37:49,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:49,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:37:49,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:37:49,627 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:37:50,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:50,443 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-09-17 02:37:50,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:37:50,444 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:37:50,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:50,445 INFO L225 Difference]: With dead ends: 117 [2020-09-17 02:37:50,445 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 02:37:50,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:37:50,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 02:37:50,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-09-17 02:37:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:37:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:37:50,448 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:37:50,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:50,448 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:37:50,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:37:50,449 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:37:50,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:50,449 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:50,449 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:50,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-17 02:37:50,650 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:50,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:50,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-09-17 02:37:50,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:50,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473873998] [2020-09-17 02:37:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:50,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473873998] [2020-09-17 02:37:50,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719105310] [2020-09-17 02:37:50,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:51,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:51,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:51,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:51,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:37:51,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227079231] [2020-09-17 02:37:51,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:51,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:51,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:51,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:51,050 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:37:51,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:51,762 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-09-17 02:37:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:37:51,763 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:37:51,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:51,764 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:37:51,764 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:37:51,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:37:51,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:37:51,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-09-17 02:37:51,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:37:51,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:37:51,767 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:37:51,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:51,767 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:37:51,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:51,767 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:37:51,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:51,768 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:51,768 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:51,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-17 02:37:51,971 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:51,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:51,972 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-09-17 02:37:51,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:51,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950273477] [2020-09-17 02:37:51,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:52,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950273477] [2020-09-17 02:37:52,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623691083] [2020-09-17 02:37:52,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:52,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:37:52,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:52,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:52,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:52,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:52,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:52,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:37:52,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406849327] [2020-09-17 02:37:52,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:37:52,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:52,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:37:52,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:37:52,399 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:37:53,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:53,308 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-17 02:37:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:37:53,309 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:37:53,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:53,309 INFO L225 Difference]: With dead ends: 113 [2020-09-17 02:37:53,309 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 02:37:53,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:37:53,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 02:37:53,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-09-17 02:37:53,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:37:53,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:37:53,311 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:37:53,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:53,312 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:37:53,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:37:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:37:53,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:53,312 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:53,312 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:53,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-17 02:37:53,519 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:53,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:53,519 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-09-17 02:37:53,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:53,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813501008] [2020-09-17 02:37:53,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:53,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813501008] [2020-09-17 02:37:53,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353257251] [2020-09-17 02:37:53,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:53,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:37:53,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:53,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:53,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:53,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:53,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:37:53,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471273584] [2020-09-17 02:37:53,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:53,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:53,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:53,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:53,910 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:37:54,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:54,713 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-09-17 02:37:54,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:37:54,714 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:37:54,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:54,715 INFO L225 Difference]: With dead ends: 110 [2020-09-17 02:37:54,715 INFO L226 Difference]: Without dead ends: 104 [2020-09-17 02:37:54,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:37:54,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-17 02:37:54,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-09-17 02:37:54,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:37:54,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:37:54,718 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:37:54,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:54,719 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:37:54,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:54,719 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:37:54,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:54,719 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:54,719 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:54,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-17 02:37:54,920 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:54,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:54,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-09-17 02:37:54,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:54,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386757476] [2020-09-17 02:37:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:55,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386757476] [2020-09-17 02:37:55,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025558383] [2020-09-17 02:37:55,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:55,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:37:55,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:55,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:55,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:55,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:55,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:55,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:37:55,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788464940] [2020-09-17 02:37:55,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:37:55,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:55,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:37:55,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:37:55,349 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:37:56,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:56,370 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-09-17 02:37:56,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:37:56,371 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:37:56,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:56,372 INFO L225 Difference]: With dead ends: 109 [2020-09-17 02:37:56,372 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:37:56,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:37:56,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:37:56,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-09-17 02:37:56,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:37:56,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:37:56,374 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:37:56,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:56,374 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:37:56,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:37:56,374 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:37:56,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:56,374 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:56,375 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:56,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:56,575 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:56,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:56,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-09-17 02:37:56,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:56,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94778411] [2020-09-17 02:37:56,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:56,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94778411] [2020-09-17 02:37:56,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159082208] [2020-09-17 02:37:56,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:56,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:37:56,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:56,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:56,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:56,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:56,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:37:56,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831957363] [2020-09-17 02:37:56,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:56,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:56,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:56,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:56,970 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:37:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:57,850 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-09-17 02:37:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:37:57,852 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:37:57,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:57,852 INFO L225 Difference]: With dead ends: 106 [2020-09-17 02:37:57,852 INFO L226 Difference]: Without dead ends: 100 [2020-09-17 02:37:57,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:37:57,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-17 02:37:57,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-09-17 02:37:57,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:37:57,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:37:57,856 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:37:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:57,856 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:37:57,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:37:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:57,856 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:57,856 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:58,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-17 02:37:58,057 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:58,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:58,058 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-09-17 02:37:58,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:58,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040075825] [2020-09-17 02:37:58,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:58,361 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:58,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040075825] [2020-09-17 02:37:58,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597495443] [2020-09-17 02:37:58,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:58,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:37:58,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:58,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:58,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:58,471 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:58,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:58,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:37:58,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406739987] [2020-09-17 02:37:58,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:37:58,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:58,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:37:58,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:37:58,488 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:37:59,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:59,622 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-09-17 02:37:59,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:37:59,623 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:37:59,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:59,624 INFO L225 Difference]: With dead ends: 105 [2020-09-17 02:37:59,624 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 02:37:59,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:37:59,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 02:37:59,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-09-17 02:37:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:37:59,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:37:59,627 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:37:59,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:59,627 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:37:59,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:37:59,627 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:37:59,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:59,628 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:59,628 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:59,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:59,829 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:59,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:59,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-09-17 02:37:59,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:59,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435138190] [2020-09-17 02:37:59,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:00,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435138190] [2020-09-17 02:38:00,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867450204] [2020-09-17 02:38:00,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:00,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:38:00,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:00,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:00,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:38:00,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831975120] [2020-09-17 02:38:00,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:38:00,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:00,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:38:00,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:38:00,209 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:38:01,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:01,173 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-09-17 02:38:01,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:38:01,174 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:38:01,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:01,175 INFO L225 Difference]: With dead ends: 102 [2020-09-17 02:38:01,175 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 02:38:01,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:38:01,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 02:38:01,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-09-17 02:38:01,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:38:01,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:38:01,178 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:38:01,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:01,179 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:38:01,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:38:01,179 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:38:01,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:38:01,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:01,180 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:01,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:01,380 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:01,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:01,381 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-09-17 02:38:01,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:01,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356395616] [2020-09-17 02:38:01,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:01,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356395616] [2020-09-17 02:38:01,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854270767] [2020-09-17 02:38:01,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:01,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:38:01,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:01,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:38:01,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:01,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:01,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:01,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:38:01,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064605773] [2020-09-17 02:38:01,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:01,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:01,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:01,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:01,786 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:38:03,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:03,030 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-17 02:38:03,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:38:03,031 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:38:03,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:03,032 INFO L225 Difference]: With dead ends: 101 [2020-09-17 02:38:03,032 INFO L226 Difference]: Without dead ends: 95 [2020-09-17 02:38:03,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:38:03,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-17 02:38:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-09-17 02:38:03,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:38:03,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:38:03,035 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:38:03,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:03,035 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:38:03,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:03,036 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:38:03,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:38:03,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:03,036 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:03,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-09-17 02:38:03,237 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:03,238 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-09-17 02:38:03,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:03,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999750256] [2020-09-17 02:38:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:03,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999750256] [2020-09-17 02:38:03,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635526572] [2020-09-17 02:38:03,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:03,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:38:03,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:03,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:38:03,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:03,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:03,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:38:03,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371895203] [2020-09-17 02:38:03,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:38:03,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:03,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:38:03,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:38:03,615 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:38:04,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:04,678 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-17 02:38:04,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:38:04,679 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:38:04,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:04,680 INFO L225 Difference]: With dead ends: 98 [2020-09-17 02:38:04,680 INFO L226 Difference]: Without dead ends: 92 [2020-09-17 02:38:04,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:38:04,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-17 02:38:04,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-09-17 02:38:04,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:38:04,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:38:04,682 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:38:04,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:04,682 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:38:04,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:38:04,682 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:38:04,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:38:04,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:04,683 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:04,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:04,884 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:04,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:04,885 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-09-17 02:38:04,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:04,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109881474] [2020-09-17 02:38:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:05,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109881474] [2020-09-17 02:38:05,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533336373] [2020-09-17 02:38:05,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:05,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:38:05,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:05,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:38:05,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:05,270 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:05,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:05,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:38:05,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307240944] [2020-09-17 02:38:05,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:05,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:05,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:05,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:05,294 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:38:06,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:06,667 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-09-17 02:38:06,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:38:06,668 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:38:06,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:06,668 INFO L225 Difference]: With dead ends: 97 [2020-09-17 02:38:06,669 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 02:38:06,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:38:06,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 02:38:06,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-09-17 02:38:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:38:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:38:06,670 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:38:06,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:06,671 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:38:06,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:38:06,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:38:06,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:06,671 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:06,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-17 02:38:06,872 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:06,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:06,873 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-09-17 02:38:06,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:06,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064807932] [2020-09-17 02:38:06,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:07,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064807932] [2020-09-17 02:38:07,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246339088] [2020-09-17 02:38:07,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:07,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:38:07,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:07,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:38:07,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:07,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:07,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:38:07,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42344443] [2020-09-17 02:38:07,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:38:07,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:07,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:38:07,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:38:07,261 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:38:08,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:08,340 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-17 02:38:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:38:08,341 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:38:08,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:08,342 INFO L225 Difference]: With dead ends: 113 [2020-09-17 02:38:08,342 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 02:38:08,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:38:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 02:38:08,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-09-17 02:38:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 02:38:08,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-09-17 02:38:08,345 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-09-17 02:38:08,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:08,345 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-09-17 02:38:08,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:38:08,346 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-09-17 02:38:08,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:38:08,346 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:08,346 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:08,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-17 02:38:08,547 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:08,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:08,547 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-09-17 02:38:08,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:08,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754066881] [2020-09-17 02:38:08,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:08,825 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:08,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754066881] [2020-09-17 02:38:08,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75162115] [2020-09-17 02:38:08,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:08,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:38:08,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:08,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:08,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:08,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:08,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:38:08,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924452296] [2020-09-17 02:38:08,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:08,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:08,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:08,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:08,959 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-09-17 02:38:10,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:10,228 INFO L93 Difference]: Finished difference Result 92 states and 229 transitions. [2020-09-17 02:38:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:38:10,229 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:38:10,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:10,230 INFO L225 Difference]: With dead ends: 92 [2020-09-17 02:38:10,230 INFO L226 Difference]: Without dead ends: 84 [2020-09-17 02:38:10,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:38:10,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-17 02:38:10,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2020-09-17 02:38:10,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-17 02:38:10,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-09-17 02:38:10,232 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-09-17 02:38:10,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:10,233 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-09-17 02:38:10,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:10,233 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-09-17 02:38:10,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:38:10,233 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:10,233 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:10,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-17 02:38:10,434 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:10,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:10,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-09-17 02:38:10,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:10,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681587471] [2020-09-17 02:38:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:10,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681587471] [2020-09-17 02:38:10,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61298973] [2020-09-17 02:38:10,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:10,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:38:10,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:10,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:38:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:10,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:10,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:38:10,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897518431] [2020-09-17 02:38:10,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:10,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:10,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:10,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:10,818 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-09-17 02:38:12,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:12,130 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-17 02:38:12,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:38:12,131 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:38:12,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:12,132 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:38:12,132 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:38:12,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:38:12,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:38:12,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-09-17 02:38:12,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:38:12,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-17 02:38:12,134 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-09-17 02:38:12,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:12,134 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-17 02:38:12,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:12,134 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-17 02:38:12,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:12,134 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:12,135 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:12,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-17 02:38:12,335 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:12,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:12,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-09-17 02:38:12,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:12,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698657138] [2020-09-17 02:38:12,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:12,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698657138] [2020-09-17 02:38:12,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128215473] [2020-09-17 02:38:12,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:12,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:38:12,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:12,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:12,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:12,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:38:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:12,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:12,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:12,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974417230] [2020-09-17 02:38:12,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:12,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:12,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:12,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:12,766 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-09-17 02:38:14,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:14,179 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-09-17 02:38:14,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:38:14,180 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:14,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:14,180 INFO L225 Difference]: With dead ends: 90 [2020-09-17 02:38:14,181 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:38:14,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:38:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:38:14,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-17 02:38:14,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:38:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-17 02:38:14,183 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-09-17 02:38:14,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:14,184 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-17 02:38:14,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:14,184 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-17 02:38:14,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:14,184 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:14,184 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:14,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:14,385 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:14,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:14,386 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-09-17 02:38:14,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:14,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435802643] [2020-09-17 02:38:14,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:14,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435802643] [2020-09-17 02:38:14,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69744862] [2020-09-17 02:38:14,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:14,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:38:14,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:14,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:14,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:14,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:14,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:38:14,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992109531] [2020-09-17 02:38:14,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:14,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:14,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:14,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:14,856 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-09-17 02:38:15,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:15,413 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-09-17 02:38:15,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:38:15,414 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:38:15,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:15,415 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:38:15,415 INFO L226 Difference]: Without dead ends: 90 [2020-09-17 02:38:15,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:38:15,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-17 02:38:15,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-17 02:38:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:38:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-17 02:38:15,417 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-09-17 02:38:15,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:15,417 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-17 02:38:15,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:15,417 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-17 02:38:15,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:15,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:15,418 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:15,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:15,619 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:15,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:15,619 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-09-17 02:38:15,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:15,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500849258] [2020-09-17 02:38:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:16,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500849258] [2020-09-17 02:38:16,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87331810] [2020-09-17 02:38:16,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:16,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:38:16,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:16,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:16,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:16,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:16,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:16,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:16,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32610365] [2020-09-17 02:38:16,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:16,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:16,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:16,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:16,111 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-09-17 02:38:16,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:16,732 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-09-17 02:38:16,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:38:16,734 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:16,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:16,734 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:38:16,734 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:38:16,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:38:16,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:38:16,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-09-17 02:38:16,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:38:16,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-09-17 02:38:16,737 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-09-17 02:38:16,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:16,738 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-09-17 02:38:16,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:16,738 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-09-17 02:38:16,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:16,739 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:16,739 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:16,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:16,947 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:16,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:16,948 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-09-17 02:38:16,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:16,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056802567] [2020-09-17 02:38:16,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:17,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056802567] [2020-09-17 02:38:17,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494548649] [2020-09-17 02:38:17,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:17,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:38:17,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:17,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:17,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:17,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:17,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:38:17,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195527229] [2020-09-17 02:38:17,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:17,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:17,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:17,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:17,420 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-09-17 02:38:18,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:18,131 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-09-17 02:38:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:38:18,132 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:38:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:18,133 INFO L225 Difference]: With dead ends: 115 [2020-09-17 02:38:18,133 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:38:18,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:38:18,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:38:18,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-09-17 02:38:18,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-17 02:38:18,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-09-17 02:38:18,136 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-09-17 02:38:18,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:18,137 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-09-17 02:38:18,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:18,137 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-09-17 02:38:18,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:18,137 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:18,137 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:18,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:18,346 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:18,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:18,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-09-17 02:38:18,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:18,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967783497] [2020-09-17 02:38:18,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:18,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967783497] [2020-09-17 02:38:18,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861471612] [2020-09-17 02:38:18,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:18,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:38:18,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:18,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:18,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:18,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:18,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:18,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:18,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126925821] [2020-09-17 02:38:18,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:18,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:18,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:18,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:18,857 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-09-17 02:38:19,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:19,634 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-09-17 02:38:19,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:38:19,635 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:19,635 INFO L225 Difference]: With dead ends: 129 [2020-09-17 02:38:19,636 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 02:38:19,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:38:19,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 02:38:19,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-09-17 02:38:19,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:38:19,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-09-17 02:38:19,638 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-09-17 02:38:19,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:19,638 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-09-17 02:38:19,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:19,639 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-09-17 02:38:19,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:19,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:19,639 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:19,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:19,846 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:19,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:19,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-09-17 02:38:19,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:19,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424076336] [2020-09-17 02:38:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:20,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424076336] [2020-09-17 02:38:20,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400021214] [2020-09-17 02:38:20,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:20,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:20,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:20,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:20,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:38:20,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453991618] [2020-09-17 02:38:20,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:20,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:20,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:20,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:20,292 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-09-17 02:38:21,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:21,053 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-09-17 02:38:21,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:38:21,054 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:38:21,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:21,055 INFO L225 Difference]: With dead ends: 129 [2020-09-17 02:38:21,055 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 02:38:21,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:38:21,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 02:38:21,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-09-17 02:38:21,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 02:38:21,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-09-17 02:38:21,058 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-09-17 02:38:21,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:21,058 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-09-17 02:38:21,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:21,059 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-09-17 02:38:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:21,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:21,059 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:21,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:21,260 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:21,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:21,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-09-17 02:38:21,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:21,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259634126] [2020-09-17 02:38:21,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:21,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259634126] [2020-09-17 02:38:21,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313800294] [2020-09-17 02:38:21,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:21,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:38:21,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:21,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:21,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:21,721 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:21,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:21,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:21,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335383203] [2020-09-17 02:38:21,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:21,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:21,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:21,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:21,738 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-09-17 02:38:22,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:22,609 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-09-17 02:38:22,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:38:22,610 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:22,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:22,611 INFO L225 Difference]: With dead ends: 126 [2020-09-17 02:38:22,611 INFO L226 Difference]: Without dead ends: 120 [2020-09-17 02:38:22,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:38:22,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-17 02:38:22,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-09-17 02:38:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 02:38:22,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-09-17 02:38:22,614 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-09-17 02:38:22,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:22,615 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-09-17 02:38:22,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:22,615 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-09-17 02:38:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:22,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:22,616 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:22,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:22,818 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:22,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:22,818 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-09-17 02:38:22,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:22,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674711141] [2020-09-17 02:38:22,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:23,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674711141] [2020-09-17 02:38:23,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260260109] [2020-09-17 02:38:23,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:23,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:38:23,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:23,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:23,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:23,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:23,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:38:23,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922192966] [2020-09-17 02:38:23,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:23,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:23,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:23,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:23,244 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-09-17 02:38:24,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:24,110 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-09-17 02:38:24,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:38:24,111 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:38:24,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:24,112 INFO L225 Difference]: With dead ends: 127 [2020-09-17 02:38:24,112 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 02:38:24,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:38:24,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 02:38:24,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-09-17 02:38:24,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:38:24,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-09-17 02:38:24,114 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-09-17 02:38:24,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:24,114 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-09-17 02:38:24,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-09-17 02:38:24,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:24,115 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:24,115 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:24,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-17 02:38:24,316 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:24,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:24,317 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-09-17 02:38:24,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:24,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575973523] [2020-09-17 02:38:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:24,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575973523] [2020-09-17 02:38:24,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057132045] [2020-09-17 02:38:24,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:24,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:38:24,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:24,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:24,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:24,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:24,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:24,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:24,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345971366] [2020-09-17 02:38:24,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:24,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:24,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:24,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:24,788 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-09-17 02:38:25,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:25,799 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-09-17 02:38:25,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:38:25,800 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:25,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:25,801 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:38:25,801 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:38:25,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:38:25,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:38:25,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-09-17 02:38:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:38:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-09-17 02:38:25,804 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-09-17 02:38:25,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:25,804 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-09-17 02:38:25,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:25,804 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-09-17 02:38:25,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:25,804 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:25,805 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:26,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-17 02:38:26,005 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:26,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:26,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-09-17 02:38:26,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:26,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004578336] [2020-09-17 02:38:26,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:26,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004578336] [2020-09-17 02:38:26,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091850057] [2020-09-17 02:38:26,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:26,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:38:26,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:26,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:26,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:26,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:26,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:38:26,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104708023] [2020-09-17 02:38:26,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:26,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:26,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:26,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:26,410 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-09-17 02:38:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:27,320 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-09-17 02:38:27,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:38:27,322 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:38:27,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:27,322 INFO L225 Difference]: With dead ends: 125 [2020-09-17 02:38:27,322 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 02:38:27,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:38:27,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 02:38:27,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-09-17 02:38:27,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 02:38:27,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-09-17 02:38:27,330 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-09-17 02:38:27,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:27,330 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-09-17 02:38:27,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:27,330 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-09-17 02:38:27,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:27,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:27,331 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:27,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-17 02:38:27,532 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:27,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:27,532 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-09-17 02:38:27,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:27,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550905749] [2020-09-17 02:38:27,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:27,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550905749] [2020-09-17 02:38:27,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70267882] [2020-09-17 02:38:27,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:27,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:38:27,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:27,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:27,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:27,963 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:27,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:27,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:27,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038807282] [2020-09-17 02:38:27,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:27,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:27,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:27,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:27,982 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-09-17 02:38:29,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:29,105 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-09-17 02:38:29,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:38:29,106 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:29,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:29,107 INFO L225 Difference]: With dead ends: 122 [2020-09-17 02:38:29,107 INFO L226 Difference]: Without dead ends: 116 [2020-09-17 02:38:29,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:38:29,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-17 02:38:29,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-09-17 02:38:29,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:38:29,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-09-17 02:38:29,109 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-09-17 02:38:29,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:29,109 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-09-17 02:38:29,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:29,109 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-09-17 02:38:29,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:29,110 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:29,110 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:29,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-17 02:38:29,311 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:29,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:29,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-09-17 02:38:29,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:29,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637593701] [2020-09-17 02:38:29,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:29,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637593701] [2020-09-17 02:38:29,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934931381] [2020-09-17 02:38:29,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:29,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:29,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:29,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:29,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:38:29,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499130046] [2020-09-17 02:38:29,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:29,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:29,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:29,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:29,730 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-09-17 02:38:30,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:30,757 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-17 02:38:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:38:30,758 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:38:30,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:30,758 INFO L225 Difference]: With dead ends: 123 [2020-09-17 02:38:30,758 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:38:30,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:38:30,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:38:30,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-17 02:38:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 02:38:30,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-09-17 02:38:30,761 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-09-17 02:38:30,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:30,761 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-09-17 02:38:30,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:30,761 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-09-17 02:38:30,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:30,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:30,762 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:30,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:30,963 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:30,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:30,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-09-17 02:38:30,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:30,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222095214] [2020-09-17 02:38:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:31,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222095214] [2020-09-17 02:38:31,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371203072] [2020-09-17 02:38:31,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:31,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:38:31,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:31,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:31,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:31,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:31,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:31,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:31,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054946052] [2020-09-17 02:38:31,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:31,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:31,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:31,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:31,410 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-09-17 02:38:32,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:32,636 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-09-17 02:38:32,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:38:32,637 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:32,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:32,637 INFO L225 Difference]: With dead ends: 120 [2020-09-17 02:38:32,638 INFO L226 Difference]: Without dead ends: 114 [2020-09-17 02:38:32,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:38:32,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-17 02:38:32,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-09-17 02:38:32,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:38:32,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-09-17 02:38:32,641 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-09-17 02:38:32,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:32,641 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-09-17 02:38:32,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:32,641 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-09-17 02:38:32,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:32,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:32,641 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:32,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:32,842 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:32,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:32,843 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-09-17 02:38:32,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:32,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141511620] [2020-09-17 02:38:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:33,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141511620] [2020-09-17 02:38:33,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360382029] [2020-09-17 02:38:33,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:33,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:38:33,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:33,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:33,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:33,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:33,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:38:33,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855837778] [2020-09-17 02:38:33,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:33,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:33,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:33,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:33,253 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-09-17 02:38:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:34,363 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-17 02:38:34,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:38:34,364 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:38:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:34,365 INFO L225 Difference]: With dead ends: 121 [2020-09-17 02:38:34,365 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 02:38:34,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:38:34,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 02:38:34,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-17 02:38:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:38:34,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:38:34,368 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-09-17 02:38:34,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:34,368 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:38:34,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:34,368 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:38:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:34,368 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:34,368 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:34,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-17 02:38:34,569 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:34,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:34,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-09-17 02:38:34,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:34,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614903374] [2020-09-17 02:38:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:34,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614903374] [2020-09-17 02:38:34,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927786163] [2020-09-17 02:38:34,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:34,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:38:34,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:34,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:34,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:34,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:34,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:34,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:34,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499674546] [2020-09-17 02:38:34,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:34,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:34,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:34,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:34,997 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-09-17 02:38:36,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:36,317 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-17 02:38:36,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:38:36,318 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:36,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:36,319 INFO L225 Difference]: With dead ends: 118 [2020-09-17 02:38:36,319 INFO L226 Difference]: Without dead ends: 112 [2020-09-17 02:38:36,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:38:36,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-17 02:38:36,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-09-17 02:38:36,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:38:36,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:38:36,321 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-09-17 02:38:36,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:36,322 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:38:36,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:36,322 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:38:36,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:36,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:36,323 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:36,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:36,524 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:36,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:36,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-09-17 02:38:36,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:36,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058575799] [2020-09-17 02:38:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:36,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058575799] [2020-09-17 02:38:36,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741636044] [2020-09-17 02:38:36,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:36,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:38:36,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:36,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:36,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:36,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:36,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:38:36,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724894121] [2020-09-17 02:38:36,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:36,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:36,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:36,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:36,937 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-09-17 02:38:38,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:38,118 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-09-17 02:38:38,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:38:38,119 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:38:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:38,119 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:38:38,120 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:38:38,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:38:38,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:38:38,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-17 02:38:38,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 02:38:38,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-09-17 02:38:38,123 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-09-17 02:38:38,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:38,123 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-09-17 02:38:38,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:38,124 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-09-17 02:38:38,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:38,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:38,124 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:38,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:38,325 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:38,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:38,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-09-17 02:38:38,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:38,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917641760] [2020-09-17 02:38:38,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:38,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917641760] [2020-09-17 02:38:38,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195201622] [2020-09-17 02:38:38,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:38,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:38:38,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:38,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:38,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:38,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:38,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:38,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:38,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128036630] [2020-09-17 02:38:38,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:38,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:38,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:38,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:38,763 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-09-17 02:38:40,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:40,219 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-09-17 02:38:40,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:38:40,221 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:40,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:40,221 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:38:40,221 INFO L226 Difference]: Without dead ends: 110 [2020-09-17 02:38:40,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:38:40,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-17 02:38:40,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-09-17 02:38:40,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:38:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-17 02:38:40,225 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-09-17 02:38:40,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:40,225 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-17 02:38:40,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:40,225 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-17 02:38:40,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:40,226 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:40,226 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:40,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:40,432 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:40,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:40,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-09-17 02:38:40,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:40,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885941185] [2020-09-17 02:38:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:40,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885941185] [2020-09-17 02:38:40,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848458511] [2020-09-17 02:38:40,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:40,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:40,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:40,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:40,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:38:40,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833184200] [2020-09-17 02:38:40,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:40,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:40,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:40,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:40,839 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-09-17 02:38:42,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:42,080 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-17 02:38:42,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:38:42,081 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:38:42,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:42,082 INFO L225 Difference]: With dead ends: 136 [2020-09-17 02:38:42,082 INFO L226 Difference]: Without dead ends: 130 [2020-09-17 02:38:42,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:38:42,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-17 02:38:42,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-09-17 02:38:42,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:38:42,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-09-17 02:38:42,087 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-09-17 02:38:42,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:42,087 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-09-17 02:38:42,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:42,087 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-09-17 02:38:42,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:42,088 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:42,088 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:42,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:42,297 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:42,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:42,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-09-17 02:38:42,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:42,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062830656] [2020-09-17 02:38:42,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:42,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062830656] [2020-09-17 02:38:42,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059637898] [2020-09-17 02:38:42,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:42,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:38:42,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:42,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:42,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:42,698 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:42,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:42,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:42,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7087368] [2020-09-17 02:38:42,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:42,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:42,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:42,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:42,722 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-09-17 02:38:44,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:44,228 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-09-17 02:38:44,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:38:44,230 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:44,231 INFO L225 Difference]: With dead ends: 117 [2020-09-17 02:38:44,231 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:38:44,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:38:44,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:38:44,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-09-17 02:38:44,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 02:38:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-09-17 02:38:44,234 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-09-17 02:38:44,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:44,234 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-09-17 02:38:44,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-09-17 02:38:44,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:44,234 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:44,234 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:44,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:44,435 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:44,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:44,436 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-09-17 02:38:44,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:44,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482010107] [2020-09-17 02:38:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:44,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482010107] [2020-09-17 02:38:44,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470202454] [2020-09-17 02:38:44,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:44,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:38:44,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:44,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:44,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:44,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:44,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:38:44,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781289338] [2020-09-17 02:38:44,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:44,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:44,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:44,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:44,959 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-09-17 02:38:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:45,609 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-17 02:38:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:38:45,610 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:38:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:45,611 INFO L225 Difference]: With dead ends: 134 [2020-09-17 02:38:45,611 INFO L226 Difference]: Without dead ends: 128 [2020-09-17 02:38:45,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:38:45,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-17 02:38:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-09-17 02:38:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:38:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:38:45,613 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:38:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:45,614 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:38:45,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:38:45,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:45,614 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:45,614 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:45,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-17 02:38:45,815 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:45,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:45,816 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-09-17 02:38:45,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:45,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212741609] [2020-09-17 02:38:45,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:46,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212741609] [2020-09-17 02:38:46,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477656368] [2020-09-17 02:38:46,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:46,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:38:46,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:46,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:46,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:46,358 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:46,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:46,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:38:46,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697431773] [2020-09-17 02:38:46,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:38:46,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:46,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:38:46,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:38:46,374 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:38:47,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:47,136 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-09-17 02:38:47,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:38:47,137 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:38:47,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:47,138 INFO L225 Difference]: With dead ends: 131 [2020-09-17 02:38:47,138 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 02:38:47,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:38:47,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 02:38:47,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-17 02:38:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:38:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:38:47,141 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:38:47,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:47,141 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:38:47,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:38:47,141 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:38:47,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:47,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:47,142 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:47,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-17 02:38:47,343 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:47,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:47,343 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-09-17 02:38:47,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:47,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547152961] [2020-09-17 02:38:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:47,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547152961] [2020-09-17 02:38:47,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564901741] [2020-09-17 02:38:47,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:47,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:38:47,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:47,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:47,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:47,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:47,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:38:47,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280570832] [2020-09-17 02:38:47,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:47,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:47,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:47,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:47,850 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:38:48,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:48,650 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-09-17 02:38:48,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:38:48,651 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:38:48,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:48,652 INFO L225 Difference]: With dead ends: 128 [2020-09-17 02:38:48,652 INFO L226 Difference]: Without dead ends: 122 [2020-09-17 02:38:48,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:38:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-17 02:38:48,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-09-17 02:38:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:38:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:38:48,654 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:38:48,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:48,655 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:38:48,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:48,655 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:38:48,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:48,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:48,655 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:48,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:48,856 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:48,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:48,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-09-17 02:38:48,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:48,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518356443] [2020-09-17 02:38:48,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:49,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518356443] [2020-09-17 02:38:49,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172326942] [2020-09-17 02:38:49,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:49,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:38:49,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:49,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:49,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:49,367 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:49,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:49,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:38:49,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620763167] [2020-09-17 02:38:49,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:38:49,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:49,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:38:49,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:38:49,389 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:38:50,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:50,346 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-09-17 02:38:50,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:38:50,348 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:38:50,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:50,348 INFO L225 Difference]: With dead ends: 127 [2020-09-17 02:38:50,348 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 02:38:50,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:38:50,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 02:38:50,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-09-17 02:38:50,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:38:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:38:50,351 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:38:50,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:50,351 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:38:50,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:38:50,352 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:38:50,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:50,352 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:50,352 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:50,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-17 02:38:50,553 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:50,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:50,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-09-17 02:38:50,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:50,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651008754] [2020-09-17 02:38:50,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:50,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651008754] [2020-09-17 02:38:50,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001563198] [2020-09-17 02:38:50,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:51,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:51,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:51,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:51,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:38:51,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230119166] [2020-09-17 02:38:51,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:51,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:51,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:51,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:51,055 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:38:51,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:51,929 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-09-17 02:38:51,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:38:51,929 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:38:51,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:51,930 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:38:51,930 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:38:51,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:38:51,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:38:51,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-09-17 02:38:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:38:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:38:51,933 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:38:51,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:51,933 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:38:51,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:51,934 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:38:51,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:51,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:51,934 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:52,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:52,135 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:52,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:52,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-09-17 02:38:52,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:52,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758016536] [2020-09-17 02:38:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:52,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758016536] [2020-09-17 02:38:52,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367710474] [2020-09-17 02:38:52,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:52,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:38:52,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:52,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:52,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:52,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:52,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:52,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:38:52,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351874368] [2020-09-17 02:38:52,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:38:52,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:52,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:38:52,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:38:52,652 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:38:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:53,727 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-09-17 02:38:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:38:53,728 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:38:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:53,729 INFO L225 Difference]: With dead ends: 123 [2020-09-17 02:38:53,729 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:38:53,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:38:53,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:38:53,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-09-17 02:38:53,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:38:53,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:38:53,732 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:38:53,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:53,732 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:38:53,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:38:53,732 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:38:53,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:53,732 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:53,733 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:53,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:53,933 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:53,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:53,934 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-09-17 02:38:53,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:53,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659887220] [2020-09-17 02:38:53,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:54,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659887220] [2020-09-17 02:38:54,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736282290] [2020-09-17 02:38:54,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:54,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:38:54,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:54,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:54,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:54,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:54,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:38:54,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454413511] [2020-09-17 02:38:54,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:54,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:54,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:54,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:54,396 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:38:55,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:55,355 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-17 02:38:55,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:38:55,356 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:38:55,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:55,357 INFO L225 Difference]: With dead ends: 120 [2020-09-17 02:38:55,357 INFO L226 Difference]: Without dead ends: 114 [2020-09-17 02:38:55,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:38:55,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-17 02:38:55,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-09-17 02:38:55,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:38:55,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:38:55,360 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:38:55,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:55,360 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:38:55,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:55,360 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:38:55,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:55,360 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:55,360 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:55,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:55,561 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:55,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:55,562 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-09-17 02:38:55,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:55,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954535567] [2020-09-17 02:38:55,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:55,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954535567] [2020-09-17 02:38:55,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026131297] [2020-09-17 02:38:55,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:56,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:38:56,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:56,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:56,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:56,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:56,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:56,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:38:56,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601968191] [2020-09-17 02:38:56,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:38:56,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:56,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:38:56,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:38:56,060 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:38:57,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:57,268 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-09-17 02:38:57,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:38:57,269 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:38:57,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:57,270 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:38:57,271 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:38:57,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:38:57,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:38:57,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-09-17 02:38:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:38:57,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:38:57,273 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:38:57,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:57,274 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:38:57,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:38:57,274 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:38:57,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:57,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:57,275 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:57,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:57,483 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:57,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:57,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-09-17 02:38:57,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:57,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474332080] [2020-09-17 02:38:57,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:57,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474332080] [2020-09-17 02:38:57,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419621464] [2020-09-17 02:38:57,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:57,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:38:57,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:57,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:57,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:57,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:57,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:38:57,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398017253] [2020-09-17 02:38:57,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:57,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:57,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:57,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:57,958 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:38:59,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:59,027 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-09-17 02:38:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:38:59,028 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:38:59,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:59,029 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:38:59,029 INFO L226 Difference]: Without dead ends: 110 [2020-09-17 02:38:59,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:38:59,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-17 02:38:59,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-09-17 02:38:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:38:59,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:38:59,032 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:38:59,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:59,032 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:38:59,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:59,033 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:38:59,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:59,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:59,033 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:59,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-09-17 02:38:59,235 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:59,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:59,235 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-09-17 02:38:59,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:59,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404191991] [2020-09-17 02:38:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:59,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:59,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404191991] [2020-09-17 02:38:59,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266691497] [2020-09-17 02:38:59,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:59,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:38:59,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:59,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:59,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:59,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:59,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:59,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:38:59,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059846467] [2020-09-17 02:38:59,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:38:59,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:59,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:38:59,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:38:59,744 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:39:01,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:01,089 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-09-17 02:39:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:39:01,090 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:39:01,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:01,091 INFO L225 Difference]: With dead ends: 115 [2020-09-17 02:39:01,091 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:39:01,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:39:01,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:39:01,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-09-17 02:39:01,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:39:01,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:39:01,094 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:39:01,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:01,095 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:39:01,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:01,095 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:39:01,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:39:01,095 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:01,095 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:01,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:01,296 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:01,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:01,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-09-17 02:39:01,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:01,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992817756] [2020-09-17 02:39:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:01,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992817756] [2020-09-17 02:39:01,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375200747] [2020-09-17 02:39:01,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:01,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:39:01,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:01,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:01,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:39:01,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966163219] [2020-09-17 02:39:01,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:39:01,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:01,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:39:01,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:39:01,752 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:39:02,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:02,919 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-09-17 02:39:02,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:39:02,920 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:39:02,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:02,921 INFO L225 Difference]: With dead ends: 112 [2020-09-17 02:39:02,921 INFO L226 Difference]: Without dead ends: 106 [2020-09-17 02:39:02,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:39:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-17 02:39:02,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-09-17 02:39:02,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:39:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:39:02,924 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:39:02,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:02,925 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:39:02,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:39:02,925 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:39:02,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:39:02,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:02,925 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:03,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-17 02:39:03,126 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:03,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:03,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-09-17 02:39:03,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:03,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465330216] [2020-09-17 02:39:03,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:03,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465330216] [2020-09-17 02:39:03,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869519427] [2020-09-17 02:39:03,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:03,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:39:03,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:03,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:39:03,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:03,584 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:03,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:03,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:39:03,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14472159] [2020-09-17 02:39:03,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:03,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:03,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:03,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:03,605 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:39:05,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:05,073 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-09-17 02:39:05,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:39:05,074 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:39:05,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:05,074 INFO L225 Difference]: With dead ends: 111 [2020-09-17 02:39:05,075 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 02:39:05,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:39:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 02:39:05,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-09-17 02:39:05,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:39:05,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:39:05,077 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:39:05,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:05,077 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:39:05,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:05,078 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:39:05,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:39:05,078 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:05,078 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:05,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-17 02:39:05,279 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:05,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:05,279 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-09-17 02:39:05,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:05,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602068501] [2020-09-17 02:39:05,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:05,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602068501] [2020-09-17 02:39:05,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871601048] [2020-09-17 02:39:05,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:05,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:39:05,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:05,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:39:05,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:05,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:05,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:39:05,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876161095] [2020-09-17 02:39:05,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:39:05,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:05,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:39:05,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:39:05,725 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:39:06,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:06,975 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-17 02:39:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:39:06,977 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:39:06,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:06,977 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:39:06,977 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 02:39:06,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:39:06,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 02:39:06,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-09-17 02:39:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:39:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:39:06,980 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:39:06,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:06,980 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:39:06,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:39:06,981 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:39:06,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:39:06,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:06,981 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:07,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:07,185 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:07,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:07,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-09-17 02:39:07,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:07,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269609824] [2020-09-17 02:39:07,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:07,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269609824] [2020-09-17 02:39:07,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785661984] [2020-09-17 02:39:07,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:07,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:39:07,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:07,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:39:07,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:07,632 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:07,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:07,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:39:07,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748733495] [2020-09-17 02:39:07,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:07,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:07,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:07,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:07,655 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:39:09,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:09,234 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-17 02:39:09,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:39:09,235 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:39:09,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:09,236 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:39:09,236 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:39:09,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:39:09,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:39:09,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-09-17 02:39:09,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:39:09,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:39:09,241 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:39:09,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:09,241 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:39:09,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:09,242 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:39:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:39:09,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:09,242 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:09,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:09,447 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:09,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:09,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-09-17 02:39:09,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:09,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933620433] [2020-09-17 02:39:09,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:09,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933620433] [2020-09-17 02:39:09,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096969375] [2020-09-17 02:39:09,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:09,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:39:09,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:09,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:39:09,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:09,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:09,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:39:09,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104446949] [2020-09-17 02:39:09,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:39:09,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:09,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:39:09,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:39:09,891 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:39:11,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:11,202 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-09-17 02:39:11,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:39:11,203 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:39:11,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:11,204 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:39:11,204 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:39:11,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:39:11,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:39:11,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-09-17 02:39:11,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:39:11,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:39:11,207 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:39:11,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:11,207 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:39:11,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:39:11,208 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:39:11,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:39:11,208 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:11,208 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:11,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:11,409 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:11,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:11,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-09-17 02:39:11,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:11,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961680523] [2020-09-17 02:39:11,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:11,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961680523] [2020-09-17 02:39:11,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46414324] [2020-09-17 02:39:11,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:11,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:39:11,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:11,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:39:11,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:11,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:11,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:11,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:39:11,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357839329] [2020-09-17 02:39:11,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:11,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:11,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:11,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:11,893 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:39:13,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:13,617 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-09-17 02:39:13,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:39:13,619 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:39:13,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:13,619 INFO L225 Difference]: With dead ends: 103 [2020-09-17 02:39:13,619 INFO L226 Difference]: Without dead ends: 97 [2020-09-17 02:39:13,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:39:13,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-17 02:39:13,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-09-17 02:39:13,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:39:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:39:13,621 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:39:13,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:13,622 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:39:13,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:13,625 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:39:13,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:39:13,625 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:13,625 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:13,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-17 02:39:13,834 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:13,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:13,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-09-17 02:39:13,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:13,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97827709] [2020-09-17 02:39:13,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:14,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97827709] [2020-09-17 02:39:14,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216833670] [2020-09-17 02:39:14,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:14,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:39:14,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:14,283 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:14,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:14,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:39:14,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262854243] [2020-09-17 02:39:14,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:39:14,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:14,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:39:14,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:39:14,285 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:39:15,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:15,681 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-17 02:39:15,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:39:15,682 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:39:15,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:15,683 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:39:15,683 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:39:15,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:39:15,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:39:15,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-09-17 02:39:15,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 02:39:15,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-09-17 02:39:15,686 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-09-17 02:39:15,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:15,686 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-09-17 02:39:15,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:39:15,687 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-09-17 02:39:15,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:39:15,687 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:15,687 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:15,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:15,888 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:15,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:15,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-09-17 02:39:15,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:15,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500565126] [2020-09-17 02:39:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:16,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500565126] [2020-09-17 02:39:16,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280446190] [2020-09-17 02:39:16,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:16,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:39:16,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:16,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:39:16,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:16,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:16,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:16,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:39:16,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105001837] [2020-09-17 02:39:16,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:16,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:16,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:16,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:16,361 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-09-17 02:39:18,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:18,094 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-09-17 02:39:18,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:39:18,095 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:39:18,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:18,096 INFO L225 Difference]: With dead ends: 100 [2020-09-17 02:39:18,096 INFO L226 Difference]: Without dead ends: 92 [2020-09-17 02:39:18,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:39:18,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-17 02:39:18,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-09-17 02:39:18,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-17 02:39:18,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-09-17 02:39:18,098 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-09-17 02:39:18,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:18,099 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-09-17 02:39:18,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:18,099 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-09-17 02:39:18,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:39:18,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:18,099 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:18,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:18,300 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:18,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:18,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-09-17 02:39:18,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:18,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068227579] [2020-09-17 02:39:18,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:18,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068227579] [2020-09-17 02:39:18,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166265432] [2020-09-17 02:39:18,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:18,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:39:18,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:18,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:39:18,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:18,747 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:39:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:18,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:18,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:39:18,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99102145] [2020-09-17 02:39:18,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:18,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:18,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:18,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:18,776 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-09-17 02:39:20,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:20,457 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-09-17 02:39:20,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:39:20,458 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:39:20,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:20,459 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:39:20,459 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 02:39:20,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:39:20,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 02:39:20,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-09-17 02:39:20,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:39:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-17 02:39:20,462 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-09-17 02:39:20,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:20,462 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-17 02:39:20,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:20,463 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-17 02:39:20,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:20,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:20,463 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:20,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:20,664 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:20,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:20,665 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-09-17 02:39:20,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:20,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329987811] [2020-09-17 02:39:20,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:21,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329987811] [2020-09-17 02:39:21,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38326766] [2020-09-17 02:39:21,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:21,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:39:21,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:21,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:21,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:21,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:39:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:21,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:21,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:21,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128794926] [2020-09-17 02:39:21,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:21,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:21,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:21,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:21,173 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-09-17 02:39:22,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:22,922 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-09-17 02:39:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:39:22,923 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:22,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:22,924 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:39:22,924 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 02:39:22,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:39:22,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 02:39:22,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-17 02:39:22,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:39:22,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-17 02:39:22,927 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-09-17 02:39:22,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:22,927 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-17 02:39:22,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:22,927 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-17 02:39:22,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:22,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:22,927 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:23,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:23,128 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:23,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:23,129 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-09-17 02:39:23,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:23,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284183848] [2020-09-17 02:39:23,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:23,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284183848] [2020-09-17 02:39:23,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304683122] [2020-09-17 02:39:23,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:23,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:39:23,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:23,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:23,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:23,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:23,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:23,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893940281] [2020-09-17 02:39:23,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:23,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:23,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:23,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:23,703 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-09-17 02:39:24,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:24,467 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-09-17 02:39:24,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:39:24,468 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:39:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:24,469 INFO L225 Difference]: With dead ends: 102 [2020-09-17 02:39:24,469 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 02:39:24,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:39:24,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 02:39:24,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-17 02:39:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:39:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-17 02:39:24,471 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-09-17 02:39:24,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:24,472 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-17 02:39:24,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:24,472 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-17 02:39:24,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:24,472 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:24,472 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:24,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-09-17 02:39:24,673 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:24,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:24,674 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-09-17 02:39:24,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:24,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891662111] [2020-09-17 02:39:24,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:25,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891662111] [2020-09-17 02:39:25,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360698474] [2020-09-17 02:39:25,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:25,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:39:25,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:25,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:25,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:25,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:25,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:25,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:25,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022442531] [2020-09-17 02:39:25,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:25,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:25,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:25,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:25,265 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-09-17 02:39:26,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:26,109 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-09-17 02:39:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:39:26,110 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:26,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:26,111 INFO L225 Difference]: With dead ends: 122 [2020-09-17 02:39:26,111 INFO L226 Difference]: Without dead ends: 116 [2020-09-17 02:39:26,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:39:26,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-17 02:39:26,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-09-17 02:39:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 02:39:26,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-09-17 02:39:26,115 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-09-17 02:39:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:26,115 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-09-17 02:39:26,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:26,115 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-09-17 02:39:26,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:26,116 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:26,116 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:26,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-17 02:39:26,326 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:26,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:26,326 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-09-17 02:39:26,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:26,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250792003] [2020-09-17 02:39:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:26,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250792003] [2020-09-17 02:39:26,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499187464] [2020-09-17 02:39:26,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:26,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:26,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:26,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:26,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:26,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376628512] [2020-09-17 02:39:26,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:26,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:26,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:26,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:26,885 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-09-17 02:39:27,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:27,798 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-09-17 02:39:27,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:39:27,800 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:39:27,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:27,801 INFO L225 Difference]: With dead ends: 123 [2020-09-17 02:39:27,801 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:39:27,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:39:27,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:39:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-09-17 02:39:27,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:39:27,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-09-17 02:39:27,804 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-09-17 02:39:27,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:27,804 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-09-17 02:39:27,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:27,804 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-09-17 02:39:27,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:27,804 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:27,804 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:28,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-17 02:39:28,005 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:28,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:28,006 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-09-17 02:39:28,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:28,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912372554] [2020-09-17 02:39:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:28,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912372554] [2020-09-17 02:39:28,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627438811] [2020-09-17 02:39:28,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:28,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:39:28,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:28,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:28,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:28,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:28,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:28,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:28,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689435207] [2020-09-17 02:39:28,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:28,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:28,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:28,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:28,612 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-09-17 02:39:29,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:29,565 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-09-17 02:39:29,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:39:29,566 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:29,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:29,567 INFO L225 Difference]: With dead ends: 139 [2020-09-17 02:39:29,567 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 02:39:29,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:39:29,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 02:39:29,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-09-17 02:39:29,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:39:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-09-17 02:39:29,570 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-09-17 02:39:29,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:29,571 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-09-17 02:39:29,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:29,571 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-09-17 02:39:29,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:29,571 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:29,572 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:29,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-17 02:39:29,779 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:29,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:29,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-09-17 02:39:29,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:29,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613415113] [2020-09-17 02:39:29,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:30,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613415113] [2020-09-17 02:39:30,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241327728] [2020-09-17 02:39:30,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:30,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:39:30,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:30,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:30,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:30,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:30,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:30,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814373005] [2020-09-17 02:39:30,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:30,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:30,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:30,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:30,315 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-09-17 02:39:31,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:31,212 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-09-17 02:39:31,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:39:31,213 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:39:31,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:31,214 INFO L225 Difference]: With dead ends: 139 [2020-09-17 02:39:31,214 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 02:39:31,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:39:31,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 02:39:31,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-09-17 02:39:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 02:39:31,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-09-17 02:39:31,216 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-09-17 02:39:31,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:31,217 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-09-17 02:39:31,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:31,217 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-09-17 02:39:31,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:31,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:31,217 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:31,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:31,418 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:31,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:31,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-09-17 02:39:31,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:31,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706855445] [2020-09-17 02:39:31,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:31,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706855445] [2020-09-17 02:39:31,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211339926] [2020-09-17 02:39:31,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:31,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:39:31,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:31,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:31,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:31,985 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:32,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:32,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:32,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265444403] [2020-09-17 02:39:32,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:32,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:32,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:32,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:32,004 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-09-17 02:39:33,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:33,099 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-09-17 02:39:33,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:39:33,100 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:33,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:33,101 INFO L225 Difference]: With dead ends: 136 [2020-09-17 02:39:33,101 INFO L226 Difference]: Without dead ends: 130 [2020-09-17 02:39:33,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:39:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-17 02:39:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-09-17 02:39:33,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:39:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-09-17 02:39:33,104 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-09-17 02:39:33,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:33,104 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-09-17 02:39:33,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-09-17 02:39:33,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:33,104 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:33,104 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:33,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-17 02:39:33,305 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:33,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:33,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-09-17 02:39:33,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:33,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517182225] [2020-09-17 02:39:33,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:33,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517182225] [2020-09-17 02:39:33,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647905439] [2020-09-17 02:39:33,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:33,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:39:33,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:33,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:33,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:33,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:33,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:33,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858464959] [2020-09-17 02:39:33,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:33,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:33,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:33,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:33,837 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-09-17 02:39:34,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:34,884 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-09-17 02:39:34,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:39:34,885 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:39:34,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:34,886 INFO L225 Difference]: With dead ends: 137 [2020-09-17 02:39:34,886 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:39:34,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:39:34,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:39:34,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-09-17 02:39:34,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 02:39:34,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-09-17 02:39:34,889 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-09-17 02:39:34,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:34,889 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-09-17 02:39:34,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:34,890 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-09-17 02:39:34,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:34,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:34,890 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:35,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:35,091 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:35,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:35,091 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-09-17 02:39:35,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:35,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965989146] [2020-09-17 02:39:35,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:35,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965989146] [2020-09-17 02:39:35,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631461899] [2020-09-17 02:39:35,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:35,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:39:35,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:35,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:35,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:35,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:35,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:35,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:35,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753572083] [2020-09-17 02:39:35,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:35,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:35,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:35,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:35,670 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-09-17 02:39:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:36,899 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-09-17 02:39:36,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:39:36,901 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:36,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:36,901 INFO L225 Difference]: With dead ends: 134 [2020-09-17 02:39:36,902 INFO L226 Difference]: Without dead ends: 128 [2020-09-17 02:39:36,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:39:36,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-17 02:39:36,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-09-17 02:39:36,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:39:36,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-09-17 02:39:36,905 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-09-17 02:39:36,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:36,905 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-09-17 02:39:36,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:36,906 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-09-17 02:39:36,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:36,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:36,906 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:37,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-09-17 02:39:37,109 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:37,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:37,110 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-09-17 02:39:37,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:37,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124197466] [2020-09-17 02:39:37,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:37,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124197466] [2020-09-17 02:39:37,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535954666] [2020-09-17 02:39:37,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:37,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:37,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:37,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:37,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:37,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128536282] [2020-09-17 02:39:37,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:37,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:37,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:37,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:37,628 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-09-17 02:39:38,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:38,759 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-09-17 02:39:38,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:39:38,760 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:39:38,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:38,761 INFO L225 Difference]: With dead ends: 135 [2020-09-17 02:39:38,761 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 02:39:38,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:39:38,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 02:39:38,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-09-17 02:39:38,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:39:38,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-09-17 02:39:38,764 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-09-17 02:39:38,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:38,764 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-09-17 02:39:38,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:38,764 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-09-17 02:39:38,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:38,765 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:38,765 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:38,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:38,966 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:38,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:38,966 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-09-17 02:39:38,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:38,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280812839] [2020-09-17 02:39:38,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:39,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280812839] [2020-09-17 02:39:39,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648460654] [2020-09-17 02:39:39,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:39,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:39:39,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:39,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:39,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:39,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:39,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:39,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:39,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541022999] [2020-09-17 02:39:39,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:39,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:39,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:39,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:39,513 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-09-17 02:39:40,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:40,868 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-09-17 02:39:40,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:39:40,870 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:40,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:40,870 INFO L225 Difference]: With dead ends: 132 [2020-09-17 02:39:40,870 INFO L226 Difference]: Without dead ends: 126 [2020-09-17 02:39:40,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:39:40,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-17 02:39:40,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-09-17 02:39:40,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:39:40,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-09-17 02:39:40,873 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-09-17 02:39:40,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:40,873 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-09-17 02:39:40,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:40,874 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-09-17 02:39:40,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:40,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:40,874 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:41,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:41,075 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:41,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:41,076 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-09-17 02:39:41,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:41,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500081899] [2020-09-17 02:39:41,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:41,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500081899] [2020-09-17 02:39:41,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455020538] [2020-09-17 02:39:41,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:41,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:39:41,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:41,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:41,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:41,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:41,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:41,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091336534] [2020-09-17 02:39:41,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:41,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:41,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:41,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:41,567 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-09-17 02:39:42,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:42,785 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-09-17 02:39:42,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:39:42,786 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:39:42,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:42,787 INFO L225 Difference]: With dead ends: 133 [2020-09-17 02:39:42,787 INFO L226 Difference]: Without dead ends: 127 [2020-09-17 02:39:42,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:39:42,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-17 02:39:42,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-09-17 02:39:42,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 02:39:42,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-09-17 02:39:42,789 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-09-17 02:39:42,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:42,790 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-09-17 02:39:42,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:42,790 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-09-17 02:39:42,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:42,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:42,790 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:42,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:42,991 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:42,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:42,992 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-09-17 02:39:42,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:42,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197353329] [2020-09-17 02:39:42,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:43,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197353329] [2020-09-17 02:39:43,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098103654] [2020-09-17 02:39:43,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:43,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:39:43,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:43,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:43,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:43,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:43,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:43,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:43,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055374060] [2020-09-17 02:39:43,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:43,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:43,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:43,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:43,527 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-09-17 02:39:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:44,983 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-09-17 02:39:44,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:39:44,984 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:44,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:44,985 INFO L225 Difference]: With dead ends: 130 [2020-09-17 02:39:44,985 INFO L226 Difference]: Without dead ends: 124 [2020-09-17 02:39:44,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:39:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-17 02:39:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-09-17 02:39:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:39:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-09-17 02:39:44,987 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-09-17 02:39:44,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:44,988 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-09-17 02:39:44,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:44,988 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-09-17 02:39:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:44,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:44,988 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:45,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:45,189 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:45,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-09-17 02:39:45,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:45,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372579423] [2020-09-17 02:39:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:45,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372579423] [2020-09-17 02:39:45,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730067353] [2020-09-17 02:39:45,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:45,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:39:45,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:45,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:45,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:45,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:45,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:45,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890553427] [2020-09-17 02:39:45,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:45,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:45,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:45,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:45,683 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-09-17 02:39:47,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:47,002 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-09-17 02:39:47,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:39:47,003 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:39:47,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:47,003 INFO L225 Difference]: With dead ends: 131 [2020-09-17 02:39:47,004 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 02:39:47,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:39:47,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 02:39:47,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-09-17 02:39:47,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 02:39:47,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-09-17 02:39:47,008 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-09-17 02:39:47,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:47,008 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-09-17 02:39:47,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:47,009 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-09-17 02:39:47,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:47,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:47,009 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:47,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-09-17 02:39:47,210 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:47,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:47,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-09-17 02:39:47,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:47,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126256435] [2020-09-17 02:39:47,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:47,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126256435] [2020-09-17 02:39:47,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215884860] [2020-09-17 02:39:47,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:47,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:39:47,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:47,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:47,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:47,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:47,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:47,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:47,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059559120] [2020-09-17 02:39:47,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:47,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:47,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:47,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:47,737 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-09-17 02:39:49,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:49,342 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-09-17 02:39:49,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:39:49,343 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:49,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:49,344 INFO L225 Difference]: With dead ends: 128 [2020-09-17 02:39:49,344 INFO L226 Difference]: Without dead ends: 122 [2020-09-17 02:39:49,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:39:49,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-17 02:39:49,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-09-17 02:39:49,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 02:39:49,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-09-17 02:39:49,347 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-09-17 02:39:49,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:49,347 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-09-17 02:39:49,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:49,347 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-09-17 02:39:49,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:49,347 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:49,347 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:49,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-09-17 02:39:49,548 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:49,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:49,549 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-09-17 02:39:49,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:49,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913516014] [2020-09-17 02:39:49,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:49,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913516014] [2020-09-17 02:39:49,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471780185] [2020-09-17 02:39:49,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:50,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:50,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:50,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:50,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:50,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535772710] [2020-09-17 02:39:50,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:50,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:50,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:50,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:50,042 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-09-17 02:39:51,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:51,453 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-09-17 02:39:51,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:39:51,455 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:39:51,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:51,455 INFO L225 Difference]: With dead ends: 129 [2020-09-17 02:39:51,455 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 02:39:51,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:39:51,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 02:39:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-09-17 02:39:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:39:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:39:51,458 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-09-17 02:39:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:51,458 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:39:51,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:39:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:51,458 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:51,459 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:51,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-09-17 02:39:51,660 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:51,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:51,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-09-17 02:39:51,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:51,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679325856] [2020-09-17 02:39:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:52,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679325856] [2020-09-17 02:39:52,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926205386] [2020-09-17 02:39:52,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:52,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:39:52,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:52,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:52,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:52,155 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:52,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:52,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:52,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321523895] [2020-09-17 02:39:52,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:52,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:52,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:52,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:52,180 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-09-17 02:39:53,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:53,887 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-09-17 02:39:53,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:39:53,888 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:53,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:53,889 INFO L225 Difference]: With dead ends: 126 [2020-09-17 02:39:53,889 INFO L226 Difference]: Without dead ends: 120 [2020-09-17 02:39:53,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 02:39:53,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-17 02:39:53,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-09-17 02:39:53,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:39:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:39:53,891 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-09-17 02:39:53,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:53,891 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:39:53,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:53,892 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:39:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:53,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:53,892 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:54,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-17 02:39:54,093 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:54,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:54,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-09-17 02:39:54,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:54,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109301289] [2020-09-17 02:39:54,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:54,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109301289] [2020-09-17 02:39:54,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479810822] [2020-09-17 02:39:54,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:54,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:39:54,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:54,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:54,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:54,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:54,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:54,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599848236] [2020-09-17 02:39:54,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:54,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:54,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:54,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:54,591 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-09-17 02:39:56,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:56,071 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-09-17 02:39:56,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-17 02:39:56,073 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:39:56,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:56,073 INFO L225 Difference]: With dead ends: 127 [2020-09-17 02:39:56,073 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 02:39:56,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:39:56,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 02:39:56,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-09-17 02:39:56,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-17 02:39:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-09-17 02:39:56,076 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-09-17 02:39:56,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:56,076 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-09-17 02:39:56,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:56,077 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-09-17 02:39:56,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:56,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:56,077 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:56,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:56,278 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:56,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:56,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-09-17 02:39:56,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:56,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366061538] [2020-09-17 02:39:56,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:56,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366061538] [2020-09-17 02:39:56,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619010838] [2020-09-17 02:39:56,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:56,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:39:56,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:56,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:56,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:56,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:56,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:56,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:56,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860094447] [2020-09-17 02:39:56,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:56,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:56,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:56,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:56,791 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-09-17 02:39:58,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:58,657 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-09-17 02:39:58,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:39:58,658 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:58,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:58,659 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:39:58,659 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:39:58,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:39:58,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:39:58,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-09-17 02:39:58,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:39:58,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-17 02:39:58,663 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-09-17 02:39:58,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:58,663 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-17 02:39:58,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:58,663 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-17 02:39:58,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:58,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:58,664 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:58,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-17 02:39:58,874 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:58,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:58,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-09-17 02:39:58,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:58,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537515782] [2020-09-17 02:39:58,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:59,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537515782] [2020-09-17 02:39:59,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115542727] [2020-09-17 02:39:59,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:59,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:39:59,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:59,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:59,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:59,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:59,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:59,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75082111] [2020-09-17 02:39:59,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:59,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:59,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:59,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:59,380 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-09-17 02:40:00,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:00,964 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-09-17 02:40:00,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:40:00,965 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:40:00,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:00,966 INFO L225 Difference]: With dead ends: 144 [2020-09-17 02:40:00,966 INFO L226 Difference]: Without dead ends: 138 [2020-09-17 02:40:00,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 02:40:00,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-17 02:40:00,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-09-17 02:40:00,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 02:40:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-09-17 02:40:00,970 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-09-17 02:40:00,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:00,971 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-09-17 02:40:00,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:40:00,971 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-09-17 02:40:00,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:40:00,971 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:00,971 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:01,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:01,172 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:01,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:01,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-09-17 02:40:01,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:01,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396318542] [2020-09-17 02:40:01,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:01,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396318542] [2020-09-17 02:40:01,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437115407] [2020-09-17 02:40:01,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:01,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:40:01,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:01,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:40:01,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:01,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:01,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:01,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:40:01,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588408409] [2020-09-17 02:40:01,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:01,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:01,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:01,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:01,717 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-09-17 02:40:03,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:03,729 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-09-17 02:40:03,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:40:03,730 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:40:03,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:03,731 INFO L225 Difference]: With dead ends: 125 [2020-09-17 02:40:03,731 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:40:03,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:40:03,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:40:03,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-09-17 02:40:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 02:40:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-09-17 02:40:03,734 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-09-17 02:40:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:03,735 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-09-17 02:40:03,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:03,735 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-09-17 02:40:03,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:03,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:03,735 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:03,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-09-17 02:40:03,936 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:03,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:03,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-09-17 02:40:03,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:03,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702606068] [2020-09-17 02:40:03,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:04,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702606068] [2020-09-17 02:40:04,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663689002] [2020-09-17 02:40:04,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:04,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:04,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:04,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:04,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:40:04,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952933756] [2020-09-17 02:40:04,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:04,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:04,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:04,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:04,584 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-09-17 02:40:05,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:05,474 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-09-17 02:40:05,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:40:05,475 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:40:05,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:05,475 INFO L225 Difference]: With dead ends: 144 [2020-09-17 02:40:05,476 INFO L226 Difference]: Without dead ends: 138 [2020-09-17 02:40:05,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:40:05,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-17 02:40:05,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-09-17 02:40:05,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:40:05,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:40:05,478 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:40:05,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:05,478 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:40:05,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:05,479 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:40:05,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:05,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:05,479 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:05,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:05,680 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:05,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:05,680 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-09-17 02:40:05,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:05,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141311256] [2020-09-17 02:40:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:06,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141311256] [2020-09-17 02:40:06,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618745341] [2020-09-17 02:40:06,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:06,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:40:06,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:06,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:06,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:06,342 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:06,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:06,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:06,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164945768] [2020-09-17 02:40:06,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:06,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:06,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:06,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:06,358 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:40:07,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:07,416 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-09-17 02:40:07,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:40:07,418 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:07,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:07,419 INFO L225 Difference]: With dead ends: 141 [2020-09-17 02:40:07,419 INFO L226 Difference]: Without dead ends: 135 [2020-09-17 02:40:07,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:40:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-17 02:40:07,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-09-17 02:40:07,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:40:07,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:40:07,421 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:40:07,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:07,421 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:40:07,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:07,421 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:40:07,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:07,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:07,422 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:07,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-09-17 02:40:07,622 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:07,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:07,623 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-09-17 02:40:07,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:07,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629946198] [2020-09-17 02:40:07,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:08,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629946198] [2020-09-17 02:40:08,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721739876] [2020-09-17 02:40:08,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:08,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:40:08,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:08,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:08,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:08,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:08,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:40:08,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383984236] [2020-09-17 02:40:08,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:08,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:08,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:08,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:08,270 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:40:09,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:09,254 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-09-17 02:40:09,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:40:09,255 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:40:09,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:09,256 INFO L225 Difference]: With dead ends: 138 [2020-09-17 02:40:09,256 INFO L226 Difference]: Without dead ends: 132 [2020-09-17 02:40:09,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:40:09,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-17 02:40:09,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-09-17 02:40:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:40:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:40:09,259 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:40:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:09,259 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:40:09,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:40:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:09,260 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:09,260 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:09,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:09,461 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:09,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:09,461 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-09-17 02:40:09,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:09,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27545287] [2020-09-17 02:40:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:10,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27545287] [2020-09-17 02:40:10,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085707394] [2020-09-17 02:40:10,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:10,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:40:10,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:10,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:10,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:10,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:10,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:10,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:10,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238820953] [2020-09-17 02:40:10,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:10,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:10,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:10,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:10,134 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:40:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:11,260 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-09-17 02:40:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:40:11,262 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:11,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:11,262 INFO L225 Difference]: With dead ends: 137 [2020-09-17 02:40:11,262 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:40:11,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:40:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:40:11,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-09-17 02:40:11,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:40:11,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:40:11,265 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:40:11,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:11,265 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:40:11,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:11,265 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:40:11,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:11,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:11,266 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:11,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-09-17 02:40:11,467 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:11,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:11,467 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-09-17 02:40:11,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:11,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908893644] [2020-09-17 02:40:11,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:11,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908893644] [2020-09-17 02:40:11,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289700418] [2020-09-17 02:40:11,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:12,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:40:12,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:12,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:12,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:12,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:12,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:40:12,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992433359] [2020-09-17 02:40:12,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:12,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:12,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:12,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:12,060 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:40:13,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:13,133 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-09-17 02:40:13,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:40:13,134 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:40:13,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:13,135 INFO L225 Difference]: With dead ends: 134 [2020-09-17 02:40:13,135 INFO L226 Difference]: Without dead ends: 128 [2020-09-17 02:40:13,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:40:13,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-17 02:40:13,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-09-17 02:40:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:40:13,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:40:13,137 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:40:13,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:13,138 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:40:13,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:13,138 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:40:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:13,138 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:13,139 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:13,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-09-17 02:40:13,348 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:13,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:13,349 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-09-17 02:40:13,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:13,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151363490] [2020-09-17 02:40:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:13,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151363490] [2020-09-17 02:40:13,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770256016] [2020-09-17 02:40:13,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:13,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:40:13,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:13,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:13,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:13,959 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:13,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:13,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:13,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994431783] [2020-09-17 02:40:13,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:13,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:13,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:13,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:13,979 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:40:15,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:15,293 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-09-17 02:40:15,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:40:15,299 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:15,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:15,299 INFO L225 Difference]: With dead ends: 133 [2020-09-17 02:40:15,299 INFO L226 Difference]: Without dead ends: 127 [2020-09-17 02:40:15,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:40:15,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-17 02:40:15,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-09-17 02:40:15,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:40:15,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:40:15,302 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:40:15,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:15,302 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:40:15,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:15,302 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:40:15,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:15,302 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:15,303 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:15,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-09-17 02:40:15,506 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:15,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:15,507 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-09-17 02:40:15,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:15,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902975151] [2020-09-17 02:40:15,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:15,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902975151] [2020-09-17 02:40:15,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700020097] [2020-09-17 02:40:15,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:16,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:16,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:16,077 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:16,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:16,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:40:16,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617771855] [2020-09-17 02:40:16,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:16,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:16,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:16,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:16,078 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:40:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:17,255 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-09-17 02:40:17,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:40:17,256 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:40:17,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:17,257 INFO L225 Difference]: With dead ends: 130 [2020-09-17 02:40:17,257 INFO L226 Difference]: Without dead ends: 124 [2020-09-17 02:40:17,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:40:17,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-17 02:40:17,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-09-17 02:40:17,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:40:17,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:40:17,260 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:40:17,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:17,260 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:40:17,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:17,260 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:40:17,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:17,260 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:17,261 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:17,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:17,461 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:17,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:17,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-09-17 02:40:17,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:17,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222872653] [2020-09-17 02:40:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:17,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222872653] [2020-09-17 02:40:17,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067466844] [2020-09-17 02:40:17,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:18,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:40:18,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:18,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:18,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:18,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:18,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:18,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:18,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944614176] [2020-09-17 02:40:18,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:18,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:18,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:18,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:18,076 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:40:19,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:19,529 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-09-17 02:40:19,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:40:19,531 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:19,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:19,531 INFO L225 Difference]: With dead ends: 129 [2020-09-17 02:40:19,531 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 02:40:19,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:40:19,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 02:40:19,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-09-17 02:40:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:40:19,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:40:19,535 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:40:19,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:19,536 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:40:19,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:19,536 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:40:19,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:19,536 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:19,536 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:19,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-09-17 02:40:19,737 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:19,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:19,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-09-17 02:40:19,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:19,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279394114] [2020-09-17 02:40:19,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:20,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279394114] [2020-09-17 02:40:20,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787557428] [2020-09-17 02:40:20,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:20,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:40:20,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:20,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:20,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:20,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:20,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:40:20,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008015106] [2020-09-17 02:40:20,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:20,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:20,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:20,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:20,319 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:40:21,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:21,608 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-09-17 02:40:21,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:40:21,609 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:40:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:21,610 INFO L225 Difference]: With dead ends: 126 [2020-09-17 02:40:21,610 INFO L226 Difference]: Without dead ends: 120 [2020-09-17 02:40:21,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:40:21,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-17 02:40:21,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-09-17 02:40:21,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:40:21,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:40:21,613 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:40:21,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:21,613 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:40:21,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:21,613 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:40:21,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:21,614 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:21,614 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:21,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:21,815 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:21,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:21,815 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-09-17 02:40:21,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:21,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226122052] [2020-09-17 02:40:21,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:22,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226122052] [2020-09-17 02:40:22,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483523108] [2020-09-17 02:40:22,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:22,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:40:22,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:22,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:22,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:22,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:22,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:22,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:22,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400821750] [2020-09-17 02:40:22,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:22,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:22,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:22,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:22,428 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:40:24,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:24,017 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-09-17 02:40:24,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:40:24,019 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:24,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:24,019 INFO L225 Difference]: With dead ends: 125 [2020-09-17 02:40:24,019 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 02:40:24,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:40:24,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 02:40:24,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-09-17 02:40:24,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:40:24,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:40:24,022 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:40:24,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:24,023 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:40:24,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:24,023 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:40:24,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:24,023 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:24,023 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:24,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-09-17 02:40:24,226 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:24,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:24,227 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-09-17 02:40:24,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:24,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795576009] [2020-09-17 02:40:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:24,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795576009] [2020-09-17 02:40:24,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311472462] [2020-09-17 02:40:24,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:24,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:40:24,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:24,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:24,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:24,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:24,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:40:24,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609389090] [2020-09-17 02:40:24,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:24,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:24,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:24,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:24,782 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:40:26,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:26,152 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-09-17 02:40:26,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:40:26,153 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:40:26,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:26,154 INFO L225 Difference]: With dead ends: 122 [2020-09-17 02:40:26,154 INFO L226 Difference]: Without dead ends: 116 [2020-09-17 02:40:26,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:40:26,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-17 02:40:26,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-09-17 02:40:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:40:26,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:40:26,157 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:40:26,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:26,157 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:40:26,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:26,157 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:40:26,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:26,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:26,158 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:26,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:26,359 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:26,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:26,359 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-09-17 02:40:26,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:26,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844143800] [2020-09-17 02:40:26,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:26,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844143800] [2020-09-17 02:40:26,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986691393] [2020-09-17 02:40:26,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:26,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:40:26,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:26,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:26,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:26,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:26,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:26,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:26,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718339066] [2020-09-17 02:40:26,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:26,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:26,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:26,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:26,952 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:40:28,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:28,699 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-09-17 02:40:28,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:40:28,701 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:28,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:28,701 INFO L225 Difference]: With dead ends: 121 [2020-09-17 02:40:28,701 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 02:40:28,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:40:28,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 02:40:28,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-09-17 02:40:28,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:40:28,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:40:28,704 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:40:28,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:28,704 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:40:28,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:28,705 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:40:28,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:28,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:28,705 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:28,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-09-17 02:40:28,906 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:28,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:28,907 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-09-17 02:40:28,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:28,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32001990] [2020-09-17 02:40:28,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:29,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32001990] [2020-09-17 02:40:29,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631177383] [2020-09-17 02:40:29,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:29,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:29,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:29,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:29,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:40:29,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724913683] [2020-09-17 02:40:29,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:29,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:29,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:29,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:29,444 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:40:30,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:30,955 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-09-17 02:40:30,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:40:30,956 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:40:30,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:30,957 INFO L225 Difference]: With dead ends: 118 [2020-09-17 02:40:30,957 INFO L226 Difference]: Without dead ends: 112 [2020-09-17 02:40:30,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:40:30,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-17 02:40:30,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-09-17 02:40:30,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:40:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:40:30,960 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:40:30,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:30,960 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:40:30,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:30,960 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:40:30,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:30,961 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:30,961 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:31,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:31,162 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:31,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:31,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-09-17 02:40:31,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:31,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345300236] [2020-09-17 02:40:31,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:31,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345300236] [2020-09-17 02:40:31,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402651660] [2020-09-17 02:40:31,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:31,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:40:31,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:31,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:31,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:31,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:31,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:31,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:31,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750034018] [2020-09-17 02:40:31,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:31,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:31,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:31,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:31,735 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:40:33,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:33,615 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-09-17 02:40:33,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:40:33,617 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:33,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:33,617 INFO L225 Difference]: With dead ends: 117 [2020-09-17 02:40:33,617 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 02:40:33,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:40:33,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 02:40:33,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-09-17 02:40:33,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:40:33,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:40:33,620 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:40:33,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:33,621 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:40:33,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:33,621 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:40:33,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:33,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:33,621 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:33,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:33,822 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:33,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:33,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-09-17 02:40:33,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:33,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596709672] [2020-09-17 02:40:33,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:33,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:34,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596709672] [2020-09-17 02:40:34,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018885975] [2020-09-17 02:40:34,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:34,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:40:34,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:34,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:34,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:34,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:34,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:40:34,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028941228] [2020-09-17 02:40:34,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:34,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:34,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:34,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:34,370 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:40:35,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:35,955 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-09-17 02:40:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:40:35,956 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:40:35,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:35,956 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:40:35,957 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:40:35,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 02:40:35,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:40:35,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-09-17 02:40:35,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:40:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:40:35,959 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:40:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:35,960 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:40:35,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:35,960 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:40:35,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:35,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:35,960 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:36,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-09-17 02:40:36,161 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:36,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:36,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-09-17 02:40:36,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:36,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947334594] [2020-09-17 02:40:36,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:36,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947334594] [2020-09-17 02:40:36,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322328973] [2020-09-17 02:40:36,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:36,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:40:36,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:36,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:36,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:36,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:36,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:36,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:36,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319938069] [2020-09-17 02:40:36,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:36,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:36,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:36,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:36,740 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:40:38,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:38,761 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-17 02:40:38,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:40:38,762 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:38,762 INFO L225 Difference]: With dead ends: 113 [2020-09-17 02:40:38,763 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 02:40:38,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 02:40:38,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 02:40:38,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-09-17 02:40:38,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:40:38,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:40:38,765 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:40:38,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:38,765 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:40:38,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:38,765 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:40:38,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:38,765 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:38,765 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:38,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-09-17 02:40:38,966 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:38,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:38,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-09-17 02:40:38,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:38,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593067504] [2020-09-17 02:40:38,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:39,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593067504] [2020-09-17 02:40:39,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420994359] [2020-09-17 02:40:39,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:39,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:40:39,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:39,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:39,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:39,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:39,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:40:39,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377632262] [2020-09-17 02:40:39,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:39,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:39,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:39,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:39,512 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:40:41,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:41,208 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-09-17 02:40:41,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-17 02:40:41,209 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:40:41,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:41,210 INFO L225 Difference]: With dead ends: 110 [2020-09-17 02:40:41,210 INFO L226 Difference]: Without dead ends: 104 [2020-09-17 02:40:41,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:40:41,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-17 02:40:41,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-09-17 02:40:41,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:40:41,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:40:41,213 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:40:41,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:41,214 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:40:41,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:41,214 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:40:41,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:41,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:41,214 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:41,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-09-17 02:40:41,415 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:41,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:41,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-09-17 02:40:41,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:41,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65719459] [2020-09-17 02:40:41,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:41,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65719459] [2020-09-17 02:40:41,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443610024] [2020-09-17 02:40:41,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:41,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:40:41,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:41,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:41,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:42,016 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:42,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:42,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:42,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478848677] [2020-09-17 02:40:42,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:42,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:42,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:42,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:42,052 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:40:44,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:44,248 INFO L93 Difference]: Finished difference Result 109 states and 269 transitions. [2020-09-17 02:40:44,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:40:44,249 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:44,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:44,250 INFO L225 Difference]: With dead ends: 109 [2020-09-17 02:40:44,250 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:40:44,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1197, Invalid=2835, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 02:40:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:40:44,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-09-17 02:40:44,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:40:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:40:44,253 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:40:44,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:44,253 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:40:44,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:44,253 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:40:44,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:44,254 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:44,254 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:44,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-09-17 02:40:44,455 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:44,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:44,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-09-17 02:40:44,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:44,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996019599] [2020-09-17 02:40:44,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:44,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996019599] [2020-09-17 02:40:44,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890485593] [2020-09-17 02:40:44,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:44,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:44,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:45,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:45,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:40:45,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392608360] [2020-09-17 02:40:45,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:45,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:45,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:45,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:45,002 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:40:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:46,792 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-09-17 02:40:46,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:40:46,793 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:40:46,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:46,794 INFO L225 Difference]: With dead ends: 125 [2020-09-17 02:40:46,794 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 02:40:46,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:40:46,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 02:40:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-09-17 02:40:46,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-17 02:40:46,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-09-17 02:40:46,797 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-09-17 02:40:46,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:46,797 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-09-17 02:40:46,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:46,798 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-09-17 02:40:46,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:46,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:46,798 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:46,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-09-17 02:40:46,999 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:46,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:47,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-09-17 02:40:47,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:47,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443050776] [2020-09-17 02:40:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:47,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443050776] [2020-09-17 02:40:47,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330749769] [2020-09-17 02:40:47,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:47,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:40:47,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:47,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:47,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:47,549 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:47,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:47,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:47,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696219050] [2020-09-17 02:40:47,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:47,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:47,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:47,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:47,583 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-09-17 02:40:49,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:49,802 INFO L93 Difference]: Finished difference Result 106 states and 265 transitions. [2020-09-17 02:40:49,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 02:40:49,804 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:49,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:49,805 INFO L225 Difference]: With dead ends: 106 [2020-09-17 02:40:49,805 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:40:49,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1337, Invalid=2953, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 02:40:49,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:40:49,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-17 02:40:49,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:40:49,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-09-17 02:40:49,807 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-09-17 02:40:49,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:49,808 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-09-17 02:40:49,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:49,808 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-09-17 02:40:49,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:49,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:49,808 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:50,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:50,009 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:50,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:50,010 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-09-17 02:40:50,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:50,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012993863] [2020-09-17 02:40:50,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:50,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012993863] [2020-09-17 02:40:50,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219140612] [2020-09-17 02:40:50,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:50,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:40:50,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:50,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:50,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:50,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:40:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:50,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:50,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:50,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384775855] [2020-09-17 02:40:50,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:50,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:50,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:50,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:50,602 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-09-17 02:40:52,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:52,714 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-09-17 02:40:52,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:40:52,715 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:52,715 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:40:52,715 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 02:40:52,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 02:40:52,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 02:40:52,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-09-17 02:40:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 02:40:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-09-17 02:40:52,718 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-09-17 02:40:52,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:52,719 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-09-17 02:40:52,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:52,719 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-09-17 02:40:52,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:40:52,719 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:52,719 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:52,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-09-17 02:40:52,920 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:52,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:52,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-09-17 02:40:52,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:52,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928084280] [2020-09-17 02:40:52,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:53,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928084280] [2020-09-17 02:40:53,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941151067] [2020-09-17 02:40:53,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:53,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:40:53,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:53,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:40:53,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:53,530 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:40:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:53,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:53,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:40:53,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868498133] [2020-09-17 02:40:53,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:40:53,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:53,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:40:53,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:40:53,573 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 26 states. [2020-09-17 02:40:55,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:55,840 INFO L93 Difference]: Finished difference Result 102 states and 261 transitions. [2020-09-17 02:40:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:40:55,846 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:40:55,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:55,847 INFO L225 Difference]: With dead ends: 102 [2020-09-17 02:40:55,847 INFO L226 Difference]: Without dead ends: 97 [2020-09-17 02:40:55,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1409, Invalid=3013, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 02:40:55,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-17 02:40:55,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2020-09-17 02:40:55,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:40:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-09-17 02:40:55,849 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 29 [2020-09-17 02:40:55,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:55,849 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-09-17 02:40:55,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:40:55,850 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-09-17 02:40:55,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:40:55,850 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:55,850 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:56,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:56,058 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:56,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:56,059 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-09-17 02:40:56,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:56,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156119811] [2020-09-17 02:40:56,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:56,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156119811] [2020-09-17 02:40:56,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195017013] [2020-09-17 02:40:56,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:56,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 02:40:56,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:56,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:40:56,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:56,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:56,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:40:56,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584414874] [2020-09-17 02:40:56,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:56,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:56,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:56,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:56,822 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 25 states. [2020-09-17 02:40:57,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:57,791 INFO L93 Difference]: Finished difference Result 108 states and 251 transitions. [2020-09-17 02:40:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:40:57,792 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:40:57,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:57,793 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:40:57,793 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 02:40:57,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=663, Invalid=1407, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:40:57,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 02:40:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2020-09-17 02:40:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:40:57,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-09-17 02:40:57,797 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 29 [2020-09-17 02:40:57,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:57,797 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-09-17 02:40:57,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:57,798 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-09-17 02:40:57,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:40:57,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:57,798 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:58,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:58,007 INFO L427 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:58,008 INFO L82 PathProgramCache]: Analyzing trace with hash -972903182, now seen corresponding path program 240 times [2020-09-17 02:40:58,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:58,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235926385] [2020-09-17 02:40:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:58,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235926385] [2020-09-17 02:40:58,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807961694] [2020-09-17 02:40:58,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:58,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 02:40:58,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:58,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:40:58,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:58,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:58,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:58,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:40:58,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056721685] [2020-09-17 02:40:58,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:40:58,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:58,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:40:58,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:40:58,769 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 26 states. [2020-09-17 02:40:59,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:59,858 INFO L93 Difference]: Finished difference Result 130 states and 295 transitions. [2020-09-17 02:40:59,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:40:59,859 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:40:59,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:59,860 INFO L225 Difference]: With dead ends: 130 [2020-09-17 02:40:59,860 INFO L226 Difference]: Without dead ends: 124 [2020-09-17 02:40:59,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=672, Invalid=1584, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:40:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-17 02:40:59,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 76. [2020-09-17 02:40:59,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:40:59,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 187 transitions. [2020-09-17 02:40:59,862 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 187 transitions. Word has length 29 [2020-09-17 02:40:59,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:59,863 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 187 transitions. [2020-09-17 02:40:59,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:40:59,863 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 187 transitions. [2020-09-17 02:40:59,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:40:59,863 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:59,863 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:00,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:00,064 INFO L427 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:00,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:00,065 INFO L82 PathProgramCache]: Analyzing trace with hash -558119952, now seen corresponding path program 241 times [2020-09-17 02:41:00,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:00,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397810651] [2020-09-17 02:41:00,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:00,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397810651] [2020-09-17 02:41:00,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246549280] [2020-09-17 02:41:00,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:00,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:00,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:00,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:00,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:41:00,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457179180] [2020-09-17 02:41:00,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:41:00,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:00,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:41:00,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:41:00,746 INFO L87 Difference]: Start difference. First operand 76 states and 187 transitions. Second operand 25 states. [2020-09-17 02:41:01,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:01,862 INFO L93 Difference]: Finished difference Result 131 states and 299 transitions. [2020-09-17 02:41:01,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:41:01,863 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:41:01,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:01,864 INFO L225 Difference]: With dead ends: 131 [2020-09-17 02:41:01,864 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 02:41:01,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=674, Invalid=1678, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:41:01,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 02:41:01,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 79. [2020-09-17 02:41:01,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 02:41:01,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2020-09-17 02:41:01,867 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 29 [2020-09-17 02:41:01,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:01,867 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2020-09-17 02:41:01,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:41:01,868 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2020-09-17 02:41:01,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:01,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:01,868 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:02,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:02,069 INFO L427 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:02,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:02,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2015097940, now seen corresponding path program 242 times [2020-09-17 02:41:02,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:02,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624704918] [2020-09-17 02:41:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:02,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624704918] [2020-09-17 02:41:02,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980869188] [2020-09-17 02:41:02,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:02,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:41:02,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:02,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:02,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:02,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:02,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:02,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:41:02,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570597064] [2020-09-17 02:41:02,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:02,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:02,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:02,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:02,810 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 26 states. [2020-09-17 02:41:03,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:03,966 INFO L93 Difference]: Finished difference Result 149 states and 335 transitions. [2020-09-17 02:41:03,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:41:03,967 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:41:03,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:03,968 INFO L225 Difference]: With dead ends: 149 [2020-09-17 02:41:03,968 INFO L226 Difference]: Without dead ends: 143 [2020-09-17 02:41:03,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=712, Invalid=1838, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:41:03,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-17 02:41:03,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 78. [2020-09-17 02:41:03,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:41:03,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 193 transitions. [2020-09-17 02:41:03,970 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 193 transitions. Word has length 29 [2020-09-17 02:41:03,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:03,970 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 193 transitions. [2020-09-17 02:41:03,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:03,970 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 193 transitions. [2020-09-17 02:41:03,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:03,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:03,970 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:04,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-09-17 02:41:04,171 INFO L427 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:04,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:04,172 INFO L82 PathProgramCache]: Analyzing trace with hash 831173330, now seen corresponding path program 243 times [2020-09-17 02:41:04,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:04,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242458533] [2020-09-17 02:41:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:04,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242458533] [2020-09-17 02:41:04,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93774339] [2020-09-17 02:41:04,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:04,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 02:41:04,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:04,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:04,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:04,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:04,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:41:04,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122324719] [2020-09-17 02:41:04,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:41:04,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:04,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:41:04,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:41:04,830 INFO L87 Difference]: Start difference. First operand 78 states and 193 transitions. Second operand 25 states. [2020-09-17 02:41:06,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:06,066 INFO L93 Difference]: Finished difference Result 149 states and 337 transitions. [2020-09-17 02:41:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:41:06,068 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:41:06,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:06,068 INFO L225 Difference]: With dead ends: 149 [2020-09-17 02:41:06,068 INFO L226 Difference]: Without dead ends: 143 [2020-09-17 02:41:06,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=728, Invalid=1924, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:41:06,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-17 02:41:06,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 81. [2020-09-17 02:41:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:41:06,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 201 transitions. [2020-09-17 02:41:06,071 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 201 transitions. Word has length 29 [2020-09-17 02:41:06,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:06,071 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 201 transitions. [2020-09-17 02:41:06,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:41:06,072 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 201 transitions. [2020-09-17 02:41:06,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:06,072 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:06,072 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:06,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2020-09-17 02:41:06,273 INFO L427 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:06,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:06,273 INFO L82 PathProgramCache]: Analyzing trace with hash -716985290, now seen corresponding path program 244 times [2020-09-17 02:41:06,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:06,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230075727] [2020-09-17 02:41:06,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:06,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230075727] [2020-09-17 02:41:06,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8288567] [2020-09-17 02:41:06,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:06,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:41:06,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:06,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:06,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:06,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:06,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:06,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:41:06,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725114226] [2020-09-17 02:41:06,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:06,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:06,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:06,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:06,988 INFO L87 Difference]: Start difference. First operand 81 states and 201 transitions. Second operand 26 states. [2020-09-17 02:41:08,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:08,340 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-09-17 02:41:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:41:08,341 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:41:08,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:08,342 INFO L225 Difference]: With dead ends: 146 [2020-09-17 02:41:08,342 INFO L226 Difference]: Without dead ends: 140 [2020-09-17 02:41:08,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=731, Invalid=2025, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:41:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-17 02:41:08,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 80. [2020-09-17 02:41:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:41:08,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 199 transitions. [2020-09-17 02:41:08,346 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 199 transitions. Word has length 29 [2020-09-17 02:41:08,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:08,346 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 199 transitions. [2020-09-17 02:41:08,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:08,346 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 199 transitions. [2020-09-17 02:41:08,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:08,346 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:08,347 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:08,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-09-17 02:41:08,550 INFO L427 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:08,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:08,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2018774476, now seen corresponding path program 245 times [2020-09-17 02:41:08,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:08,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248979673] [2020-09-17 02:41:08,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:09,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248979673] [2020-09-17 02:41:09,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726588979] [2020-09-17 02:41:09,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:09,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 02:41:09,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:09,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:09,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:09,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:09,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:41:09,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034324581] [2020-09-17 02:41:09,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:41:09,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:09,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:41:09,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:41:09,219 INFO L87 Difference]: Start difference. First operand 80 states and 199 transitions. Second operand 25 states. [2020-09-17 02:41:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:10,515 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-09-17 02:41:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:41:10,516 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:41:10,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:10,516 INFO L225 Difference]: With dead ends: 147 [2020-09-17 02:41:10,516 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 02:41:10,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=762, Invalid=2100, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:41:10,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 02:41:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 83. [2020-09-17 02:41:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 02:41:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 207 transitions. [2020-09-17 02:41:10,519 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 207 transitions. Word has length 29 [2020-09-17 02:41:10,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:10,519 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 207 transitions. [2020-09-17 02:41:10,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:41:10,520 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 207 transitions. [2020-09-17 02:41:10,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:10,520 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:10,520 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:10,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-09-17 02:41:10,721 INFO L427 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:10,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:10,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1465644184, now seen corresponding path program 246 times [2020-09-17 02:41:10,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:10,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84847943] [2020-09-17 02:41:10,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:11,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84847943] [2020-09-17 02:41:11,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237848301] [2020-09-17 02:41:11,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:11,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 02:41:11,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:11,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:11,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:11,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:11,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:11,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:41:11,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735166803] [2020-09-17 02:41:11,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:11,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:11,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:11,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:11,418 INFO L87 Difference]: Start difference. First operand 83 states and 207 transitions. Second operand 26 states. [2020-09-17 02:41:12,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:12,896 INFO L93 Difference]: Finished difference Result 144 states and 329 transitions. [2020-09-17 02:41:12,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:41:12,897 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:41:12,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:12,898 INFO L225 Difference]: With dead ends: 144 [2020-09-17 02:41:12,898 INFO L226 Difference]: Without dead ends: 138 [2020-09-17 02:41:12,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=766, Invalid=2204, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:41:12,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-17 02:41:12,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2020-09-17 02:41:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:41:12,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 205 transitions. [2020-09-17 02:41:12,901 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 205 transitions. Word has length 29 [2020-09-17 02:41:12,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:12,901 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 205 transitions. [2020-09-17 02:41:12,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:12,902 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 205 transitions. [2020-09-17 02:41:12,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:12,903 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:12,903 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:13,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:13,111 INFO L427 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:13,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:13,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1517920790, now seen corresponding path program 247 times [2020-09-17 02:41:13,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:13,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963212129] [2020-09-17 02:41:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:13,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963212129] [2020-09-17 02:41:13,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464347519] [2020-09-17 02:41:13,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:13,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:13,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:13,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:13,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:41:13,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93445095] [2020-09-17 02:41:13,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:41:13,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:13,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:41:13,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:41:13,758 INFO L87 Difference]: Start difference. First operand 82 states and 205 transitions. Second operand 25 states. [2020-09-17 02:41:15,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:15,149 INFO L93 Difference]: Finished difference Result 145 states and 333 transitions. [2020-09-17 02:41:15,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:41:15,151 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:41:15,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:15,151 INFO L225 Difference]: With dead ends: 145 [2020-09-17 02:41:15,151 INFO L226 Difference]: Without dead ends: 139 [2020-09-17 02:41:15,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:41:15,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-17 02:41:15,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 85. [2020-09-17 02:41:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 02:41:15,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 213 transitions. [2020-09-17 02:41:15,154 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 213 transitions. Word has length 29 [2020-09-17 02:41:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:15,154 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 213 transitions. [2020-09-17 02:41:15,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:41:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 213 transitions. [2020-09-17 02:41:15,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:15,155 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:15,155 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:15,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2020-09-17 02:41:15,358 INFO L427 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:15,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:15,358 INFO L82 PathProgramCache]: Analyzing trace with hash -900797062, now seen corresponding path program 248 times [2020-09-17 02:41:15,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:15,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827786033] [2020-09-17 02:41:15,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:15,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827786033] [2020-09-17 02:41:15,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985280680] [2020-09-17 02:41:15,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:15,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:41:15,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:15,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:15,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:16,037 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:16,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:16,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:41:16,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782251947] [2020-09-17 02:41:16,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:16,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:16,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:16,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:16,058 INFO L87 Difference]: Start difference. First operand 85 states and 213 transitions. Second operand 26 states. [2020-09-17 02:41:17,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:17,714 INFO L93 Difference]: Finished difference Result 142 states and 327 transitions. [2020-09-17 02:41:17,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:41:17,716 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:41:17,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:17,716 INFO L225 Difference]: With dead ends: 142 [2020-09-17 02:41:17,716 INFO L226 Difference]: Without dead ends: 136 [2020-09-17 02:41:17,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=817, Invalid=2375, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:41:17,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-17 02:41:17,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-09-17 02:41:17,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 02:41:17,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 211 transitions. [2020-09-17 02:41:17,719 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 211 transitions. Word has length 29 [2020-09-17 02:41:17,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:17,719 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 211 transitions. [2020-09-17 02:41:17,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:17,720 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 211 transitions. [2020-09-17 02:41:17,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:17,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:17,720 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:17,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:17,921 INFO L427 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:17,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:17,922 INFO L82 PathProgramCache]: Analyzing trace with hash -212475272, now seen corresponding path program 249 times [2020-09-17 02:41:17,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:17,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082105955] [2020-09-17 02:41:17,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:18,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082105955] [2020-09-17 02:41:18,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17168822] [2020-09-17 02:41:18,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:18,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 02:41:18,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:18,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:18,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:18,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:18,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:41:18,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083420332] [2020-09-17 02:41:18,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:41:18,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:18,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:41:18,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:41:18,551 INFO L87 Difference]: Start difference. First operand 84 states and 211 transitions. Second operand 25 states. [2020-09-17 02:41:20,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:20,080 INFO L93 Difference]: Finished difference Result 143 states and 331 transitions. [2020-09-17 02:41:20,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:41:20,082 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:41:20,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:20,082 INFO L225 Difference]: With dead ends: 143 [2020-09-17 02:41:20,082 INFO L226 Difference]: Without dead ends: 137 [2020-09-17 02:41:20,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=878, Invalid=2428, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:41:20,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-17 02:41:20,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 87. [2020-09-17 02:41:20,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:41:20,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 219 transitions. [2020-09-17 02:41:20,085 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 219 transitions. Word has length 29 [2020-09-17 02:41:20,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:20,085 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 219 transitions. [2020-09-17 02:41:20,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:41:20,086 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 219 transitions. [2020-09-17 02:41:20,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:20,086 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:20,086 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:20,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:20,287 INFO L427 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:20,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:20,287 INFO L82 PathProgramCache]: Analyzing trace with hash 772716252, now seen corresponding path program 250 times [2020-09-17 02:41:20,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:20,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097305494] [2020-09-17 02:41:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:20,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097305494] [2020-09-17 02:41:20,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377376515] [2020-09-17 02:41:20,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:20,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:41:20,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:20,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:20,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:20,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:20,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:20,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:41:20,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602584675] [2020-09-17 02:41:20,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:20,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:20,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:20,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:20,929 INFO L87 Difference]: Start difference. First operand 87 states and 219 transitions. Second operand 26 states. [2020-09-17 02:41:22,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:22,704 INFO L93 Difference]: Finished difference Result 140 states and 325 transitions. [2020-09-17 02:41:22,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:41:22,706 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:41:22,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:22,706 INFO L225 Difference]: With dead ends: 140 [2020-09-17 02:41:22,706 INFO L226 Difference]: Without dead ends: 134 [2020-09-17 02:41:22,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=884, Invalid=2538, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 02:41:22,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-17 02:41:22,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 86. [2020-09-17 02:41:22,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:41:22,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 217 transitions. [2020-09-17 02:41:22,710 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 217 transitions. Word has length 29 [2020-09-17 02:41:22,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:22,710 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 217 transitions. [2020-09-17 02:41:22,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:22,710 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 217 transitions. [2020-09-17 02:41:22,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:22,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:22,711 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:22,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:22,912 INFO L427 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:22,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:22,912 INFO L82 PathProgramCache]: Analyzing trace with hash -844442790, now seen corresponding path program 251 times [2020-09-17 02:41:22,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:22,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278932185] [2020-09-17 02:41:22,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:23,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278932185] [2020-09-17 02:41:23,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744385234] [2020-09-17 02:41:23,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:23,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 02:41:23,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:23,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:23,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:23,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:23,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:41:23,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566036647] [2020-09-17 02:41:23,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:41:23,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:23,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:41:23,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:41:23,512 INFO L87 Difference]: Start difference. First operand 86 states and 217 transitions. Second operand 25 states. [2020-09-17 02:41:25,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:25,109 INFO L93 Difference]: Finished difference Result 141 states and 329 transitions. [2020-09-17 02:41:25,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:41:25,110 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:41:25,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:25,110 INFO L225 Difference]: With dead ends: 141 [2020-09-17 02:41:25,111 INFO L226 Difference]: Without dead ends: 135 [2020-09-17 02:41:25,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=960, Invalid=2580, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:41:25,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-17 02:41:25,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 89. [2020-09-17 02:41:25,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-17 02:41:25,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-09-17 02:41:25,113 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 29 [2020-09-17 02:41:25,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:25,113 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-09-17 02:41:25,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:41:25,114 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-09-17 02:41:25,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:25,114 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:25,114 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:25,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:25,316 INFO L427 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:25,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:25,317 INFO L82 PathProgramCache]: Analyzing trace with hash 412446910, now seen corresponding path program 252 times [2020-09-17 02:41:25,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:25,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79577974] [2020-09-17 02:41:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:25,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79577974] [2020-09-17 02:41:25,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498454764] [2020-09-17 02:41:25,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:25,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 02:41:25,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:25,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:25,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:25,937 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:25,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:25,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:41:25,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142732120] [2020-09-17 02:41:25,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:25,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:25,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:25,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:25,964 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 26 states. [2020-09-17 02:41:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:27,872 INFO L93 Difference]: Finished difference Result 138 states and 323 transitions. [2020-09-17 02:41:27,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:41:27,873 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:41:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:27,874 INFO L225 Difference]: With dead ends: 138 [2020-09-17 02:41:27,874 INFO L226 Difference]: Without dead ends: 132 [2020-09-17 02:41:27,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=967, Invalid=2693, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:41:27,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-17 02:41:27,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 88. [2020-09-17 02:41:27,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:41:27,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-09-17 02:41:27,877 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 29 [2020-09-17 02:41:27,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:27,877 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-09-17 02:41:27,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:27,877 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-09-17 02:41:27,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:27,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:27,878 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:28,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:28,079 INFO L427 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:28,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:28,080 INFO L82 PathProgramCache]: Analyzing trace with hash 2028639420, now seen corresponding path program 253 times [2020-09-17 02:41:28,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:28,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619315162] [2020-09-17 02:41:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:28,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619315162] [2020-09-17 02:41:28,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523658369] [2020-09-17 02:41:28,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:28,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:28,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:28,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:28,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:41:28,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244942928] [2020-09-17 02:41:28,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:41:28,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:28,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:41:28,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:41:28,712 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 25 states. [2020-09-17 02:41:30,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:30,479 INFO L93 Difference]: Finished difference Result 139 states and 327 transitions. [2020-09-17 02:41:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-17 02:41:30,480 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:41:30,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:30,481 INFO L225 Difference]: With dead ends: 139 [2020-09-17 02:41:30,481 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 02:41:30,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1058, Invalid=2724, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 02:41:30,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 02:41:30,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 91. [2020-09-17 02:41:30,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 02:41:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 231 transitions. [2020-09-17 02:41:30,484 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 231 transitions. Word has length 29 [2020-09-17 02:41:30,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:30,485 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 231 transitions. [2020-09-17 02:41:30,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:41:30,485 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 231 transitions. [2020-09-17 02:41:30,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:30,485 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:30,485 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:30,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2020-09-17 02:41:30,693 INFO L427 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:30,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:30,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1746584800, now seen corresponding path program 254 times [2020-09-17 02:41:30,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:30,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421023950] [2020-09-17 02:41:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:31,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421023950] [2020-09-17 02:41:31,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394218406] [2020-09-17 02:41:31,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:31,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:41:31,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:31,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:31,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:31,315 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:31,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:31,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:41:31,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74908326] [2020-09-17 02:41:31,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:31,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:31,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:31,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:31,342 INFO L87 Difference]: Start difference. First operand 91 states and 231 transitions. Second operand 26 states. [2020-09-17 02:41:33,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:33,413 INFO L93 Difference]: Finished difference Result 136 states and 321 transitions. [2020-09-17 02:41:33,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:41:33,416 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:41:33,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:33,417 INFO L225 Difference]: With dead ends: 136 [2020-09-17 02:41:33,417 INFO L226 Difference]: Without dead ends: 130 [2020-09-17 02:41:33,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1066, Invalid=2840, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:41:33,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-17 02:41:33,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2020-09-17 02:41:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 02:41:33,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-09-17 02:41:33,420 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 29 [2020-09-17 02:41:33,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:33,421 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-09-17 02:41:33,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:33,421 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-09-17 02:41:33,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:33,422 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:33,422 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:33,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-09-17 02:41:33,627 INFO L427 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:33,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:33,628 INFO L82 PathProgramCache]: Analyzing trace with hash -91273570, now seen corresponding path program 255 times [2020-09-17 02:41:33,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:33,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159333787] [2020-09-17 02:41:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:34,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159333787] [2020-09-17 02:41:34,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894352208] [2020-09-17 02:41:34,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:34,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 02:41:34,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:34,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:34,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:34,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:34,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:41:34,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178271220] [2020-09-17 02:41:34,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:41:34,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:34,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:41:34,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:41:34,249 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 25 states. [2020-09-17 02:41:36,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:36,103 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-09-17 02:41:36,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:41:36,105 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:41:36,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:36,106 INFO L225 Difference]: With dead ends: 137 [2020-09-17 02:41:36,106 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:41:36,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1172, Invalid=2860, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 02:41:36,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:41:36,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2020-09-17 02:41:36,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:41:36,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:41:36,108 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 29 [2020-09-17 02:41:36,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:36,109 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:41:36,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:41:36,109 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:41:36,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:36,109 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:36,109 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:36,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-09-17 02:41:36,310 INFO L427 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:36,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:36,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1811401214, now seen corresponding path program 256 times [2020-09-17 02:41:36,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:36,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925797770] [2020-09-17 02:41:36,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:36,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925797770] [2020-09-17 02:41:36,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174062278] [2020-09-17 02:41:36,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:36,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:41:36,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:36,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:36,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:36,931 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:36,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:36,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:41:36,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818511698] [2020-09-17 02:41:36,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:36,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:36,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:36,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:36,960 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 26 states. [2020-09-17 02:41:39,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:39,205 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-09-17 02:41:39,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:41:39,207 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:41:39,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:39,208 INFO L225 Difference]: With dead ends: 134 [2020-09-17 02:41:39,208 INFO L226 Difference]: Without dead ends: 128 [2020-09-17 02:41:39,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1181, Invalid=2979, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 02:41:39,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-17 02:41:39,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 92. [2020-09-17 02:41:39,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:41:39,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:41:39,211 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 29 [2020-09-17 02:41:39,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:39,211 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:41:39,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:39,211 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:41:39,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:39,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:39,212 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:39,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:39,413 INFO L427 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:39,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:39,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1340405504, now seen corresponding path program 257 times [2020-09-17 02:41:39,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:39,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821390426] [2020-09-17 02:41:39,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:39,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821390426] [2020-09-17 02:41:39,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85886056] [2020-09-17 02:41:39,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:39,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 02:41:39,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:39,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:39,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:40,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:40,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:41:40,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615000570] [2020-09-17 02:41:40,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:41:40,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:40,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:41:40,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:41:40,034 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 25 states. [2020-09-17 02:41:42,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:42,013 INFO L93 Difference]: Finished difference Result 135 states and 323 transitions. [2020-09-17 02:41:42,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-17 02:41:42,014 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:41:42,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:42,015 INFO L225 Difference]: With dead ends: 135 [2020-09-17 02:41:42,015 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 02:41:42,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1302, Invalid=2988, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 02:41:42,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 02:41:42,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2020-09-17 02:41:42,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-17 02:41:42,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-09-17 02:41:42,017 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 29 [2020-09-17 02:41:42,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:42,018 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-09-17 02:41:42,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:41:42,018 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-09-17 02:41:42,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:42,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:42,019 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:42,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-09-17 02:41:42,219 INFO L427 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:42,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:42,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1324318364, now seen corresponding path program 258 times [2020-09-17 02:41:42,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:42,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123149971] [2020-09-17 02:41:42,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:42,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123149971] [2020-09-17 02:41:42,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890341814] [2020-09-17 02:41:42,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:42,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 02:41:42,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:42,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:42,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:42,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:42,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:42,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:41:42,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231782719] [2020-09-17 02:41:42,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:42,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:42,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:42,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:42,859 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 26 states. [2020-09-17 02:41:45,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:45,293 INFO L93 Difference]: Finished difference Result 132 states and 317 transitions. [2020-09-17 02:41:45,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 02:41:45,295 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:41:45,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:45,295 INFO L225 Difference]: With dead ends: 132 [2020-09-17 02:41:45,296 INFO L226 Difference]: Without dead ends: 126 [2020-09-17 02:41:45,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1312, Invalid=3110, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 02:41:45,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-17 02:41:45,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2020-09-17 02:41:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 02:41:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-09-17 02:41:45,298 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 29 [2020-09-17 02:41:45,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:45,298 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-09-17 02:41:45,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:45,298 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-09-17 02:41:45,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:45,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:45,299 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:45,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:45,502 INFO L427 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:45,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:45,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1323828254, now seen corresponding path program 259 times [2020-09-17 02:41:45,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:45,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138043099] [2020-09-17 02:41:45,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:46,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138043099] [2020-09-17 02:41:46,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494382211] [2020-09-17 02:41:46,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:46,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:46,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:46,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:46,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:41:46,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386980453] [2020-09-17 02:41:46,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:41:46,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:46,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:41:46,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:41:46,124 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 25 states. [2020-09-17 02:41:48,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:48,185 INFO L93 Difference]: Finished difference Result 152 states and 367 transitions. [2020-09-17 02:41:48,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-17 02:41:48,187 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:41:48,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:48,187 INFO L225 Difference]: With dead ends: 152 [2020-09-17 02:41:48,187 INFO L226 Difference]: Without dead ends: 146 [2020-09-17 02:41:48,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1448, Invalid=3108, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 02:41:48,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-17 02:41:48,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2020-09-17 02:41:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 02:41:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 261 transitions. [2020-09-17 02:41:48,190 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 261 transitions. Word has length 29 [2020-09-17 02:41:48,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:48,190 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 261 transitions. [2020-09-17 02:41:48,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:41:48,190 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 261 transitions. [2020-09-17 02:41:48,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:48,191 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:48,191 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:48,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2020-09-17 02:41:48,393 INFO L427 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:48,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:48,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1323811514, now seen corresponding path program 260 times [2020-09-17 02:41:48,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:48,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922822320] [2020-09-17 02:41:48,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:48,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922822320] [2020-09-17 02:41:48,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351973753] [2020-09-17 02:41:48,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:48,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:41:48,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:48,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:48,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:49,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:49,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:49,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:41:49,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512367192] [2020-09-17 02:41:49,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:49,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:49,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:49,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:49,043 INFO L87 Difference]: Start difference. First operand 100 states and 261 transitions. Second operand 26 states. [2020-09-17 02:41:51,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:51,510 INFO L93 Difference]: Finished difference Result 133 states and 323 transitions. [2020-09-17 02:41:51,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 02:41:51,511 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:41:51,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:51,512 INFO L225 Difference]: With dead ends: 133 [2020-09-17 02:41:51,512 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 02:41:51,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1459, Invalid=3233, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 02:41:51,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 02:41:51,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2020-09-17 02:41:51,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-17 02:41:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-09-17 02:41:51,515 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-09-17 02:41:51,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:51,515 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-09-17 02:41:51,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:51,516 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-09-17 02:41:51,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:41:51,516 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:51,516 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:51,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:51,724 INFO L427 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:51,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:51,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1170458439, now seen corresponding path program 261 times [2020-09-17 02:41:51,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:51,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771327580] [2020-09-17 02:41:51,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:52,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771327580] [2020-09-17 02:41:52,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490663984] [2020-09-17 02:41:52,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:52,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 02:41:52,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:52,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:41:52,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:52,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:52,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:41:52,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231838739] [2020-09-17 02:41:52,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:52,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:52,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:52,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:52,525 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 26 states. [2020-09-17 02:41:53,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:53,686 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-09-17 02:41:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:41:53,688 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:41:53,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:53,689 INFO L225 Difference]: With dead ends: 154 [2020-09-17 02:41:53,689 INFO L226 Difference]: Without dead ends: 148 [2020-09-17 02:41:53,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=717, Invalid=1635, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:41:53,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-17 02:41:53,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 99. [2020-09-17 02:41:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:41:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:41:53,692 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:41:53,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:53,692 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:41:53,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:41:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:41:53,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:53,693 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:53,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:53,894 INFO L427 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:53,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:53,894 INFO L82 PathProgramCache]: Analyzing trace with hash 2085740573, now seen corresponding path program 262 times [2020-09-17 02:41:53,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:53,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715647039] [2020-09-17 02:41:53,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:54,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715647039] [2020-09-17 02:41:54,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142575331] [2020-09-17 02:41:54,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:54,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:41:54,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:54,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:41:54,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:54,755 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:54,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:54,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:41:54,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561840337] [2020-09-17 02:41:54,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:41:54,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:54,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:41:54,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:41:54,776 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:41:56,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:56,104 INFO L93 Difference]: Finished difference Result 151 states and 357 transitions. [2020-09-17 02:41:56,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:41:56,106 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:41:56,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:56,106 INFO L225 Difference]: With dead ends: 151 [2020-09-17 02:41:56,106 INFO L226 Difference]: Without dead ends: 145 [2020-09-17 02:41:56,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=770, Invalid=1882, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:41:56,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-17 02:41:56,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 98. [2020-09-17 02:41:56,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:41:56,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:41:56,108 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:41:56,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:56,109 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:41:56,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:41:56,109 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:41:56,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:41:56,109 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:56,109 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:56,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:56,310 INFO L427 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:56,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:56,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1794443493, now seen corresponding path program 263 times [2020-09-17 02:41:56,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:56,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500855500] [2020-09-17 02:41:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:56,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500855500] [2020-09-17 02:41:56,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451856410] [2020-09-17 02:41:56,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:57,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 02:41:57,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:57,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:41:57,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:57,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:57,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:41:57,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211032113] [2020-09-17 02:41:57,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:57,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:57,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:57,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:57,085 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:41:58,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:58,360 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-09-17 02:41:58,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:41:58,362 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:41:58,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:58,362 INFO L225 Difference]: With dead ends: 148 [2020-09-17 02:41:58,363 INFO L226 Difference]: Without dead ends: 142 [2020-09-17 02:41:58,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=720, Invalid=1830, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:41:58,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-17 02:41:58,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2020-09-17 02:41:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:41:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:41:58,366 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:41:58,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:58,366 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:41:58,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:58,366 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:41:58,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:41:58,366 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:58,366 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:58,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:58,569 INFO L427 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:58,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:58,570 INFO L82 PathProgramCache]: Analyzing trace with hash 778774399, now seen corresponding path program 264 times [2020-09-17 02:41:58,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:58,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696140467] [2020-09-17 02:41:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:59,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696140467] [2020-09-17 02:41:59,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288287212] [2020-09-17 02:41:59,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:59,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 02:41:59,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:59,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:41:59,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:59,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:59,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:59,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:41:59,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148366985] [2020-09-17 02:41:59,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:41:59,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:59,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:41:59,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:41:59,391 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:42:00,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:00,874 INFO L93 Difference]: Finished difference Result 147 states and 349 transitions. [2020-09-17 02:42:00,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:42:00,876 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:00,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:00,876 INFO L225 Difference]: With dead ends: 147 [2020-09-17 02:42:00,876 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 02:42:00,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=780, Invalid=2082, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:42:00,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 02:42:00,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2020-09-17 02:42:00,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:42:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:42:00,879 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:42:00,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:00,880 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:42:00,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:00,880 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:42:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:00,880 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:00,880 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:01,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:01,081 INFO L427 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:01,082 INFO L82 PathProgramCache]: Analyzing trace with hash -405150211, now seen corresponding path program 265 times [2020-09-17 02:42:01,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:01,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888127294] [2020-09-17 02:42:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:01,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888127294] [2020-09-17 02:42:01,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372950641] [2020-09-17 02:42:01,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:01,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:01,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:01,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:01,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:42:01,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088859872] [2020-09-17 02:42:01,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:42:01,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:01,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:42:01,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:42:01,840 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:42:03,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:03,214 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-09-17 02:42:03,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:42:03,216 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:42:03,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:03,217 INFO L225 Difference]: With dead ends: 144 [2020-09-17 02:42:03,217 INFO L226 Difference]: Without dead ends: 138 [2020-09-17 02:42:03,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=739, Invalid=2017, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:42:03,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-17 02:42:03,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 99. [2020-09-17 02:42:03,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:42:03,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:42:03,220 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:42:03,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:03,220 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:42:03,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:42:03,220 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:42:03,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:03,220 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:03,221 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:03,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2020-09-17 02:42:03,421 INFO L427 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:03,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:03,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1953308831, now seen corresponding path program 266 times [2020-09-17 02:42:03,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:03,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336682288] [2020-09-17 02:42:03,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:04,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336682288] [2020-09-17 02:42:04,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294217416] [2020-09-17 02:42:04,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:04,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:42:04,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:04,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:04,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:04,190 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:42:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:04,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:04,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:42:04,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424572911] [2020-09-17 02:42:04,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:04,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:04,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:04,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:04,214 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:42:05,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:05,855 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-09-17 02:42:05,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:42:05,857 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:05,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:05,858 INFO L225 Difference]: With dead ends: 143 [2020-09-17 02:42:05,858 INFO L226 Difference]: Without dead ends: 137 [2020-09-17 02:42:05,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=806, Invalid=2274, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:42:05,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-17 02:42:05,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2020-09-17 02:42:05,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:42:05,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:42:05,860 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:42:05,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:05,861 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:42:05,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:05,861 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:42:05,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:05,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:05,861 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:06,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-09-17 02:42:06,062 INFO L427 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:06,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:06,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1039869279, now seen corresponding path program 267 times [2020-09-17 02:42:06,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:06,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735337701] [2020-09-17 02:42:06,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:06,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735337701] [2020-09-17 02:42:06,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761509065] [2020-09-17 02:42:06,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:06,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 02:42:06,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:06,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:06,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:06,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:06,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:42:06,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467858295] [2020-09-17 02:42:06,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:42:06,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:06,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:42:06,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:42:06,815 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:42:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:08,336 INFO L93 Difference]: Finished difference Result 140 states and 335 transitions. [2020-09-17 02:42:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:42:08,338 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:42:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:08,338 INFO L225 Difference]: With dead ends: 140 [2020-09-17 02:42:08,339 INFO L226 Difference]: Without dead ends: 134 [2020-09-17 02:42:08,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=774, Invalid=2196, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:42:08,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-17 02:42:08,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2020-09-17 02:42:08,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:42:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:42:08,341 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:42:08,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:08,341 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:42:08,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:42:08,341 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:42:08,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:08,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:08,342 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:08,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2020-09-17 02:42:08,543 INFO L427 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:08,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:08,543 INFO L82 PathProgramCache]: Analyzing trace with hash 229320643, now seen corresponding path program 268 times [2020-09-17 02:42:08,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:08,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270984730] [2020-09-17 02:42:08,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:09,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270984730] [2020-09-17 02:42:09,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33625557] [2020-09-17 02:42:09,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:09,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:42:09,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:09,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:09,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:09,289 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:42:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:09,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:09,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:42:09,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485768753] [2020-09-17 02:42:09,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:09,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:09,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:09,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:09,313 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:42:11,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:11,119 INFO L93 Difference]: Finished difference Result 139 states and 333 transitions. [2020-09-17 02:42:11,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:42:11,121 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:11,121 INFO L225 Difference]: With dead ends: 139 [2020-09-17 02:42:11,121 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 02:42:11,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=848, Invalid=2458, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:42:11,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 02:42:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2020-09-17 02:42:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:42:11,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:42:11,125 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:42:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:11,125 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:42:11,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:11,125 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:42:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:11,126 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:11,126 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:11,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-09-17 02:42:11,327 INFO L427 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash 281597249, now seen corresponding path program 269 times [2020-09-17 02:42:11,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:11,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046438087] [2020-09-17 02:42:11,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:11,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046438087] [2020-09-17 02:42:11,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851082773] [2020-09-17 02:42:11,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:12,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 02:42:12,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:12,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:12,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:12,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:12,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:42:12,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278388293] [2020-09-17 02:42:12,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:42:12,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:12,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:42:12,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:42:12,038 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:42:13,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:13,651 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-17 02:42:13,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:42:13,652 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:42:13,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:13,653 INFO L225 Difference]: With dead ends: 136 [2020-09-17 02:42:13,653 INFO L226 Difference]: Without dead ends: 130 [2020-09-17 02:42:13,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=825, Invalid=2367, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:42:13,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-17 02:42:13,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 99. [2020-09-17 02:42:13,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:42:13,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:42:13,656 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:42:13,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:13,656 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:42:13,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:42:13,656 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:42:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:13,657 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:13,657 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:13,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:13,857 INFO L427 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:13,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:13,858 INFO L82 PathProgramCache]: Analyzing trace with hash -2137120603, now seen corresponding path program 270 times [2020-09-17 02:42:13,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:13,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108977344] [2020-09-17 02:42:13,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:14,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108977344] [2020-09-17 02:42:14,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881303481] [2020-09-17 02:42:14,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:14,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 02:42:14,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:14,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:14,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:14,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:42:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:14,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:14,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:42:14,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140421030] [2020-09-17 02:42:14,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:14,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:14,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:14,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:14,634 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:42:16,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:16,588 INFO L93 Difference]: Finished difference Result 135 states and 325 transitions. [2020-09-17 02:42:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:42:16,590 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:16,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:16,591 INFO L225 Difference]: With dead ends: 135 [2020-09-17 02:42:16,591 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 02:42:16,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=906, Invalid=2634, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:42:16,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 02:42:16,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 98. [2020-09-17 02:42:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:42:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:42:16,593 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:42:16,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:16,593 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:42:16,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:42:16,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:16,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:16,594 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:16,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2020-09-17 02:42:16,795 INFO L427 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:16,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:16,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1448798813, now seen corresponding path program 271 times [2020-09-17 02:42:16,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:16,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852111072] [2020-09-17 02:42:16,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:17,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852111072] [2020-09-17 02:42:17,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502595185] [2020-09-17 02:42:17,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:17,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:17,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:17,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:17,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:42:17,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965482651] [2020-09-17 02:42:17,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:42:17,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:17,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:42:17,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:42:17,495 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:42:19,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:19,239 INFO L93 Difference]: Finished difference Result 132 states and 319 transitions. [2020-09-17 02:42:19,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:42:19,241 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:42:19,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:19,241 INFO L225 Difference]: With dead ends: 132 [2020-09-17 02:42:19,242 INFO L226 Difference]: Without dead ends: 126 [2020-09-17 02:42:19,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 02:42:19,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-17 02:42:19,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2020-09-17 02:42:19,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:42:19,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:42:19,245 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:42:19,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:19,245 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:42:19,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:42:19,245 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:42:19,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:19,245 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:19,245 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:19,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:19,446 INFO L427 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:19,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:19,447 INFO L82 PathProgramCache]: Analyzing trace with hash -463607289, now seen corresponding path program 272 times [2020-09-17 02:42:19,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:19,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256382808] [2020-09-17 02:42:19,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:20,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256382808] [2020-09-17 02:42:20,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705461256] [2020-09-17 02:42:20,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:20,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:42:20,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:20,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:20,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:20,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:42:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:20,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:20,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:42:20,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487112698] [2020-09-17 02:42:20,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:20,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:20,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:20,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:20,173 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:42:22,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:22,358 INFO L93 Difference]: Finished difference Result 131 states and 317 transitions. [2020-09-17 02:42:22,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:42:22,360 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:22,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:22,360 INFO L225 Difference]: With dead ends: 131 [2020-09-17 02:42:22,360 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 02:42:22,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=980, Invalid=2802, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 02:42:22,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 02:42:22,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2020-09-17 02:42:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:42:22,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:42:22,363 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:42:22,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:22,364 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:42:22,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:22,364 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:42:22,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:22,364 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:22,364 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:22,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:22,565 INFO L427 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:22,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:22,566 INFO L82 PathProgramCache]: Analyzing trace with hash -2080766331, now seen corresponding path program 273 times [2020-09-17 02:42:22,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:22,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582255066] [2020-09-17 02:42:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:22,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:23,150 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:23,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582255066] [2020-09-17 02:42:23,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955580093] [2020-09-17 02:42:23,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:23,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 02:42:23,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:23,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:23,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:23,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:23,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:42:23,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323970618] [2020-09-17 02:42:23,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:42:23,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:23,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:42:23,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:42:23,260 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:42:25,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:25,117 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-09-17 02:42:25,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:42:25,118 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:42:25,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:25,119 INFO L225 Difference]: With dead ends: 128 [2020-09-17 02:42:25,119 INFO L226 Difference]: Without dead ends: 122 [2020-09-17 02:42:25,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=975, Invalid=2685, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:42:25,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-17 02:42:25,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2020-09-17 02:42:25,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:42:25,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:42:25,122 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:42:25,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:25,122 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:42:25,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:42:25,123 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:42:25,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:25,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:25,123 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:25,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:25,325 INFO L427 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:25,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:25,326 INFO L82 PathProgramCache]: Analyzing trace with hash -823876631, now seen corresponding path program 274 times [2020-09-17 02:42:25,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:25,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136457254] [2020-09-17 02:42:25,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:25,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136457254] [2020-09-17 02:42:25,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511380711] [2020-09-17 02:42:25,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:25,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:42:25,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:25,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:25,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:26,037 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:42:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:26,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:26,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:42:26,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630537922] [2020-09-17 02:42:26,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:26,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:26,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:26,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:26,065 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:42:28,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:28,371 INFO L93 Difference]: Finished difference Result 127 states and 309 transitions. [2020-09-17 02:42:28,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:42:28,373 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:28,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:28,373 INFO L225 Difference]: With dead ends: 127 [2020-09-17 02:42:28,374 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 02:42:28,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1070, Invalid=2962, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 02:42:28,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 02:42:28,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2020-09-17 02:42:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:42:28,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:42:28,383 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:42:28,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:28,383 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:42:28,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:28,383 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:42:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:28,384 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:28,384 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:28,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:28,585 INFO L427 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:28,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:28,586 INFO L82 PathProgramCache]: Analyzing trace with hash 792315879, now seen corresponding path program 275 times [2020-09-17 02:42:28,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:28,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260718844] [2020-09-17 02:42:28,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:29,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260718844] [2020-09-17 02:42:29,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644442608] [2020-09-17 02:42:29,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:29,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 02:42:29,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:29,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:29,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:29,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:29,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:42:29,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155083955] [2020-09-17 02:42:29,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:42:29,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:29,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:42:29,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:42:29,287 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:42:31,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:31,278 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-09-17 02:42:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-17 02:42:31,279 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:42:31,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:31,280 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:42:31,280 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:42:31,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1074, Invalid=2832, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:42:31,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:42:31,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2020-09-17 02:42:31,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:42:31,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:42:31,282 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:42:31,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:31,282 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:42:31,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:42:31,282 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:42:31,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:31,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:31,283 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:31,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2020-09-17 02:42:31,484 INFO L427 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:31,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:31,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1312058955, now seen corresponding path program 276 times [2020-09-17 02:42:31,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:31,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947959531] [2020-09-17 02:42:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:32,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947959531] [2020-09-17 02:42:32,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973739216] [2020-09-17 02:42:32,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:32,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 02:42:32,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:32,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:32,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:32,187 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:42:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:32,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:32,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:42:32,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196522860] [2020-09-17 02:42:32,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:32,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:32,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:32,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:32,224 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:42:34,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:34,752 INFO L93 Difference]: Finished difference Result 123 states and 301 transitions. [2020-09-17 02:42:34,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:42:34,754 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:34,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:34,755 INFO L225 Difference]: With dead ends: 123 [2020-09-17 02:42:34,755 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:42:34,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1176, Invalid=3114, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 02:42:34,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:42:34,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-09-17 02:42:34,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:42:34,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:42:34,757 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:42:34,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:34,758 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:42:34,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:34,758 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:42:34,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:34,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:34,758 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:34,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-09-17 02:42:34,959 INFO L427 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:34,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:34,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1327597111, now seen corresponding path program 277 times [2020-09-17 02:42:34,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:34,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734866666] [2020-09-17 02:42:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:35,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734866666] [2020-09-17 02:42:35,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256793225] [2020-09-17 02:42:35,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:35,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:35,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:35,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:35,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:42:35,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244955700] [2020-09-17 02:42:35,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:42:35,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:35,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:42:35,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:42:35,634 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:42:37,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:37,655 INFO L93 Difference]: Finished difference Result 120 states and 295 transitions. [2020-09-17 02:42:37,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:42:37,657 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:42:37,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:37,658 INFO L225 Difference]: With dead ends: 120 [2020-09-17 02:42:37,658 INFO L226 Difference]: Without dead ends: 114 [2020-09-17 02:42:37,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1189, Invalid=2971, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 02:42:37,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-17 02:42:37,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2020-09-17 02:42:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:42:37,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:42:37,661 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:42:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:37,661 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:42:37,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:42:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:42:37,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:37,661 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:37,661 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:37,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2020-09-17 02:42:37,862 INFO L427 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:37,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:37,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1247242541, now seen corresponding path program 278 times [2020-09-17 02:42:37,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:37,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495700568] [2020-09-17 02:42:37,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:38,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495700568] [2020-09-17 02:42:38,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689437570] [2020-09-17 02:42:38,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:38,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:42:38,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:38,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:38,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:38,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:42:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:38,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:38,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:42:38,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942125603] [2020-09-17 02:42:38,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:38,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:38,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:38,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:38,586 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:42:41,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:41,249 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-17 02:42:41,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 02:42:41,251 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:41,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:41,251 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:42:41,251 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:42:41,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1298, Invalid=3258, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 02:42:41,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:42:41,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2020-09-17 02:42:41,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:42:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:42:41,254 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:42:41,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:41,255 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:42:41,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:41,255 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:42:41,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:41,255 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:41,255 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:41,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-09-17 02:42:41,456 INFO L427 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:41,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:41,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1718238251, now seen corresponding path program 279 times [2020-09-17 02:42:41,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:41,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361795258] [2020-09-17 02:42:41,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:42,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361795258] [2020-09-17 02:42:42,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828510583] [2020-09-17 02:42:42,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:42,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 02:42:42,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:42,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:42,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:42,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:42,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:42:42,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165560935] [2020-09-17 02:42:42,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:42:42,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:42,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:42:42,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:42:42,140 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:42:44,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:44,387 INFO L93 Difference]: Finished difference Result 116 states and 287 transitions. [2020-09-17 02:42:44,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-17 02:42:44,389 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:42:44,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:44,389 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:42:44,389 INFO L226 Difference]: Without dead ends: 110 [2020-09-17 02:42:44,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1320, Invalid=3102, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 02:42:44,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-17 02:42:44,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-09-17 02:42:44,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:42:44,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:42:44,392 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:42:44,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:44,393 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:42:44,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:42:44,393 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:42:44,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:44,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:44,393 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:44,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:44,594 INFO L427 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:44,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:44,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1734325391, now seen corresponding path program 280 times [2020-09-17 02:42:44,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:44,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738052516] [2020-09-17 02:42:44,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:45,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738052516] [2020-09-17 02:42:45,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222633334] [2020-09-17 02:42:45,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:45,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:42:45,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:45,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:45,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:45,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:42:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:45,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:45,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:42:45,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435156777] [2020-09-17 02:42:45,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:45,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:45,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:45,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:45,345 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:42:48,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:48,202 INFO L93 Difference]: Finished difference Result 115 states and 285 transitions. [2020-09-17 02:42:48,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 02:42:48,204 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:48,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:48,205 INFO L225 Difference]: With dead ends: 115 [2020-09-17 02:42:48,205 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:42:48,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1436, Invalid=3394, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 02:42:48,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:42:48,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-09-17 02:42:48,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:42:48,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:42:48,208 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:42:48,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:48,208 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:42:48,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:48,208 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:42:48,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:48,208 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:48,208 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:48,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2020-09-17 02:42:48,409 INFO L427 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:48,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:48,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1734815501, now seen corresponding path program 281 times [2020-09-17 02:42:48,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:48,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034109862] [2020-09-17 02:42:48,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:48,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034109862] [2020-09-17 02:42:48,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599075727] [2020-09-17 02:42:48,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:49,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 02:42:49,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:49,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:49,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:49,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:49,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:42:49,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960200510] [2020-09-17 02:42:49,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:42:49,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:49,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:42:49,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:42:49,120 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:42:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:51,525 INFO L93 Difference]: Finished difference Result 131 states and 325 transitions. [2020-09-17 02:42:51,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-17 02:42:51,527 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:42:51,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:51,528 INFO L225 Difference]: With dead ends: 131 [2020-09-17 02:42:51,528 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 02:42:51,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1467, Invalid=3225, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 02:42:51,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 02:42:51,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2020-09-17 02:42:51,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-17 02:42:51,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 265 transitions. [2020-09-17 02:42:51,532 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 265 transitions. Word has length 30 [2020-09-17 02:42:51,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:51,532 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 265 transitions. [2020-09-17 02:42:51,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:42:51,532 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 265 transitions. [2020-09-17 02:42:51,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:51,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:51,533 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:51,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:51,743 INFO L427 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:51,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:51,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1734832241, now seen corresponding path program 282 times [2020-09-17 02:42:51,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:51,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233511289] [2020-09-17 02:42:51,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:52,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233511289] [2020-09-17 02:42:52,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132323227] [2020-09-17 02:42:52,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:52,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 02:42:52,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:52,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:52,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:52,453 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:42:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:52,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:52,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:42:52,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347510039] [2020-09-17 02:42:52,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:52,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:52,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:52,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:52,491 INFO L87 Difference]: Start difference. First operand 102 states and 265 transitions. Second operand 27 states. [2020-09-17 02:42:55,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:55,577 INFO L93 Difference]: Finished difference Result 112 states and 281 transitions. [2020-09-17 02:42:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 02:42:55,578 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:55,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:55,579 INFO L225 Difference]: With dead ends: 112 [2020-09-17 02:42:55,579 INFO L226 Difference]: Without dead ends: 104 [2020-09-17 02:42:55,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1590, Invalid=3522, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 02:42:55,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-17 02:42:55,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2020-09-17 02:42:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 02:42:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 178 transitions. [2020-09-17 02:42:55,582 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 178 transitions. Word has length 30 [2020-09-17 02:42:55,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:55,582 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 178 transitions. [2020-09-17 02:42:55,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:55,582 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 178 transitions. [2020-09-17 02:42:55,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:55,583 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:55,583 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:55,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:55,784 INFO L427 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:55,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:55,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1911532333, now seen corresponding path program 283 times [2020-09-17 02:42:55,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:55,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883404853] [2020-09-17 02:42:55,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:56,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883404853] [2020-09-17 02:42:56,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252791752] [2020-09-17 02:42:56,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:56,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:56,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:56,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:42:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:56,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:56,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:42:56,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059060407] [2020-09-17 02:42:56,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:56,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:56,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:56,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:56,532 INFO L87 Difference]: Start difference. First operand 73 states and 178 transitions. Second operand 27 states. [2020-09-17 02:42:59,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:59,339 INFO L93 Difference]: Finished difference Result 132 states and 323 transitions. [2020-09-17 02:42:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-17 02:42:59,340 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:59,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:59,341 INFO L225 Difference]: With dead ends: 132 [2020-09-17 02:42:59,341 INFO L226 Difference]: Without dead ends: 127 [2020-09-17 02:42:59,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1649, Invalid=3463, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 02:42:59,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-17 02:42:59,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2020-09-17 02:42:59,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 02:42:59,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-09-17 02:42:59,344 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 30 [2020-09-17 02:42:59,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:59,344 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-09-17 02:42:59,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:59,345 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-09-17 02:42:59,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:42:59,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:59,345 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:59,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:59,546 INFO L427 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:59,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:59,546 INFO L82 PathProgramCache]: Analyzing trace with hash -2054759070, now seen corresponding path program 284 times [2020-09-17 02:42:59,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:59,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474004030] [2020-09-17 02:42:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:00,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474004030] [2020-09-17 02:43:00,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442224593] [2020-09-17 02:43:00,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:00,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:43:00,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:00,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:00,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:00,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:43:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:00,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:00,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:00,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906988612] [2020-09-17 02:43:00,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:00,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:00,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:00,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:00,342 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 28 states. [2020-09-17 02:43:03,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:03,323 INFO L93 Difference]: Finished difference Result 108 states and 277 transitions. [2020-09-17 02:43:03,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-17 02:43:03,325 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:43:03,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:03,325 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:43:03,325 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:43:03,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1669, Invalid=3587, Unknown=0, NotChecked=0, Total=5256 [2020-09-17 02:43:03,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:43:03,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2020-09-17 02:43:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:43:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-09-17 02:43:03,328 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 31 [2020-09-17 02:43:03,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:03,329 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-09-17 02:43:03,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:43:03,329 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-09-17 02:43:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:03,329 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:03,329 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:03,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:03,535 INFO L427 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:03,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1128130483, now seen corresponding path program 285 times [2020-09-17 02:43:03,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:03,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685747753] [2020-09-17 02:43:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:04,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685747753] [2020-09-17 02:43:04,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691629249] [2020-09-17 02:43:04,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:04,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 02:43:04,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:04,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:04,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:04,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:04,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:43:04,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747601451] [2020-09-17 02:43:04,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:43:04,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:04,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:43:04,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:43:04,452 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 27 states. [2020-09-17 02:43:05,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:05,752 INFO L93 Difference]: Finished difference Result 114 states and 265 transitions. [2020-09-17 02:43:05,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:43:05,754 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:43:05,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:05,754 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:43:05,755 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:43:05,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=783, Invalid=1667, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:43:05,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:43:05,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2020-09-17 02:43:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:43:05,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 201 transitions. [2020-09-17 02:43:05,758 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 201 transitions. Word has length 31 [2020-09-17 02:43:05,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:05,758 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 201 transitions. [2020-09-17 02:43:05,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:43:05,758 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 201 transitions. [2020-09-17 02:43:05,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:05,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:05,759 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:05,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:05,967 INFO L427 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:05,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:05,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1342928561, now seen corresponding path program 286 times [2020-09-17 02:43:05,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:05,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300821895] [2020-09-17 02:43:05,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:06,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300821895] [2020-09-17 02:43:06,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111006371] [2020-09-17 02:43:06,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:06,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:43:06,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:06,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:06,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:06,934 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:43:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:06,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:06,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:06,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300944907] [2020-09-17 02:43:06,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:06,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:06,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:06,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:06,952 INFO L87 Difference]: Start difference. First operand 82 states and 201 transitions. Second operand 28 states. [2020-09-17 02:43:08,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:08,456 INFO L93 Difference]: Finished difference Result 138 states and 313 transitions. [2020-09-17 02:43:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:43:08,458 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:43:08,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:08,459 INFO L225 Difference]: With dead ends: 138 [2020-09-17 02:43:08,459 INFO L226 Difference]: Without dead ends: 132 [2020-09-17 02:43:08,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=792, Invalid=1860, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:43:08,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-17 02:43:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-09-17 02:43:08,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:43:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 197 transitions. [2020-09-17 02:43:08,462 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 197 transitions. Word has length 31 [2020-09-17 02:43:08,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:08,462 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 197 transitions. [2020-09-17 02:43:08,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:43:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 197 transitions. [2020-09-17 02:43:08,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:08,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:08,463 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:08,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-09-17 02:43:08,664 INFO L427 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:08,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:08,664 INFO L82 PathProgramCache]: Analyzing trace with hash 517654063, now seen corresponding path program 287 times [2020-09-17 02:43:08,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:08,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248955583] [2020-09-17 02:43:08,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:09,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248955583] [2020-09-17 02:43:09,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903655747] [2020-09-17 02:43:09,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:09,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 02:43:09,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:09,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:09,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:09,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:09,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:43:09,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248832441] [2020-09-17 02:43:09,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:43:09,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:09,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:43:09,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:43:09,604 INFO L87 Difference]: Start difference. First operand 80 states and 197 transitions. Second operand 27 states. [2020-09-17 02:43:11,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:11,043 INFO L93 Difference]: Finished difference Result 139 states and 317 transitions. [2020-09-17 02:43:11,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:43:11,045 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:43:11,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:11,046 INFO L225 Difference]: With dead ends: 139 [2020-09-17 02:43:11,046 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 02:43:11,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=793, Invalid=1963, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:43:11,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 02:43:11,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 83. [2020-09-17 02:43:11,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 02:43:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 205 transitions. [2020-09-17 02:43:11,048 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 205 transitions. Word has length 31 [2020-09-17 02:43:11,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:11,048 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 205 transitions. [2020-09-17 02:43:11,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:43:11,049 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 205 transitions. [2020-09-17 02:43:11,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:11,049 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:11,049 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:11,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-09-17 02:43:11,250 INFO L427 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:11,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:11,251 INFO L82 PathProgramCache]: Analyzing trace with hash -521114221, now seen corresponding path program 288 times [2020-09-17 02:43:11,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:11,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553451500] [2020-09-17 02:43:11,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:12,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553451500] [2020-09-17 02:43:12,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510334467] [2020-09-17 02:43:12,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:12,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 02:43:12,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:12,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:12,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:12,199 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:43:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:12,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:12,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:12,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158415401] [2020-09-17 02:43:12,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:12,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:12,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:12,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:12,223 INFO L87 Difference]: Start difference. First operand 83 states and 205 transitions. Second operand 28 states. [2020-09-17 02:43:13,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:13,844 INFO L93 Difference]: Finished difference Result 159 states and 357 transitions. [2020-09-17 02:43:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:43:13,846 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:43:13,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:13,846 INFO L225 Difference]: With dead ends: 159 [2020-09-17 02:43:13,846 INFO L226 Difference]: Without dead ends: 153 [2020-09-17 02:43:13,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=833, Invalid=2137, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:43:13,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-17 02:43:13,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 82. [2020-09-17 02:43:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:43:13,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 203 transitions. [2020-09-17 02:43:13,849 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 203 transitions. Word has length 31 [2020-09-17 02:43:13,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:13,850 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 203 transitions. [2020-09-17 02:43:13,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:43:13,850 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 203 transitions. [2020-09-17 02:43:13,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:13,850 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:13,850 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:14,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-09-17 02:43:14,051 INFO L427 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:14,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:14,052 INFO L82 PathProgramCache]: Analyzing trace with hash -106330991, now seen corresponding path program 289 times [2020-09-17 02:43:14,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:14,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968537540] [2020-09-17 02:43:14,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:14,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968537540] [2020-09-17 02:43:14,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35465223] [2020-09-17 02:43:14,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:14,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:14,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:14,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:14,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:43:14,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650710158] [2020-09-17 02:43:14,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:43:14,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:14,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:43:14,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:43:14,932 INFO L87 Difference]: Start difference. First operand 82 states and 203 transitions. Second operand 27 states. [2020-09-17 02:43:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:16,534 INFO L93 Difference]: Finished difference Result 159 states and 359 transitions. [2020-09-17 02:43:16,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:43:16,536 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:43:16,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:16,536 INFO L225 Difference]: With dead ends: 159 [2020-09-17 02:43:16,536 INFO L226 Difference]: Without dead ends: 153 [2020-09-17 02:43:16,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=848, Invalid=2232, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:43:16,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-17 02:43:16,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 85. [2020-09-17 02:43:16,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 02:43:16,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 211 transitions. [2020-09-17 02:43:16,539 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 211 transitions. Word has length 31 [2020-09-17 02:43:16,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:16,539 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 211 transitions. [2020-09-17 02:43:16,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:43:16,540 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 211 transitions. [2020-09-17 02:43:16,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:16,540 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:16,540 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:16,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:16,741 INFO L427 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:16,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:16,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1828080395, now seen corresponding path program 290 times [2020-09-17 02:43:16,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:16,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911435625] [2020-09-17 02:43:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:16,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:17,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911435625] [2020-09-17 02:43:17,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819852138] [2020-09-17 02:43:17,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:17,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:43:17,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:17,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:17,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:17,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:43:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:17,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:17,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:17,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899373069] [2020-09-17 02:43:17,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:17,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:17,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:17,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:17,702 INFO L87 Difference]: Start difference. First operand 85 states and 211 transitions. Second operand 28 states. [2020-09-17 02:43:19,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:19,438 INFO L93 Difference]: Finished difference Result 156 states and 353 transitions. [2020-09-17 02:43:19,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:43:19,440 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:43:19,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:19,440 INFO L225 Difference]: With dead ends: 156 [2020-09-17 02:43:19,440 INFO L226 Difference]: Without dead ends: 150 [2020-09-17 02:43:19,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=850, Invalid=2342, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:43:19,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-17 02:43:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 84. [2020-09-17 02:43:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 02:43:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 209 transitions. [2020-09-17 02:43:19,443 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 209 transitions. Word has length 31 [2020-09-17 02:43:19,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:19,443 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 209 transitions. [2020-09-17 02:43:19,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:43:19,444 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 209 transitions. [2020-09-17 02:43:19,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:19,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:19,444 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:19,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:19,645 INFO L427 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:19,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:19,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1282962291, now seen corresponding path program 291 times [2020-09-17 02:43:19,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:19,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798171698] [2020-09-17 02:43:19,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:20,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798171698] [2020-09-17 02:43:20,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239705185] [2020-09-17 02:43:20,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:20,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 02:43:20,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:20,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:20,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:20,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:20,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:43:20,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842744058] [2020-09-17 02:43:20,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:43:20,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:20,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:43:20,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:43:20,509 INFO L87 Difference]: Start difference. First operand 84 states and 209 transitions. Second operand 27 states. [2020-09-17 02:43:22,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:22,239 INFO L93 Difference]: Finished difference Result 157 states and 357 transitions. [2020-09-17 02:43:22,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:43:22,241 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:43:22,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:22,242 INFO L225 Difference]: With dead ends: 157 [2020-09-17 02:43:22,242 INFO L226 Difference]: Without dead ends: 151 [2020-09-17 02:43:22,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=880, Invalid=2426, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:43:22,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-17 02:43:22,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 87. [2020-09-17 02:43:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:43:22,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 217 transitions. [2020-09-17 02:43:22,245 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 217 transitions. Word has length 31 [2020-09-17 02:43:22,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:22,245 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 217 transitions. [2020-09-17 02:43:22,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:43:22,245 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 217 transitions. [2020-09-17 02:43:22,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:22,245 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:22,246 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:22,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:22,447 INFO L427 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:22,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:22,448 INFO L82 PathProgramCache]: Analyzing trace with hash -265196329, now seen corresponding path program 292 times [2020-09-17 02:43:22,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:22,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497381929] [2020-09-17 02:43:22,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:23,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497381929] [2020-09-17 02:43:23,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855187128] [2020-09-17 02:43:23,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:23,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:43:23,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:23,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:23,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:23,381 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:43:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:23,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:23,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:23,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007861912] [2020-09-17 02:43:23,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:23,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:23,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:23,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:23,407 INFO L87 Difference]: Start difference. First operand 87 states and 217 transitions. Second operand 28 states. [2020-09-17 02:43:25,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:25,348 INFO L93 Difference]: Finished difference Result 154 states and 351 transitions. [2020-09-17 02:43:25,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:43:25,350 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:43:25,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:25,351 INFO L225 Difference]: With dead ends: 154 [2020-09-17 02:43:25,351 INFO L226 Difference]: Without dead ends: 148 [2020-09-17 02:43:25,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=883, Invalid=2539, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 02:43:25,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-17 02:43:25,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 86. [2020-09-17 02:43:25,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:43:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 215 transitions. [2020-09-17 02:43:25,354 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 215 transitions. Word has length 31 [2020-09-17 02:43:25,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:25,354 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 215 transitions. [2020-09-17 02:43:25,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:43:25,355 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 215 transitions. [2020-09-17 02:43:25,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:25,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:25,355 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:25,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2020-09-17 02:43:25,558 INFO L427 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:25,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:25,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1566985515, now seen corresponding path program 293 times [2020-09-17 02:43:25,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:25,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151060726] [2020-09-17 02:43:25,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:26,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151060726] [2020-09-17 02:43:26,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765518339] [2020-09-17 02:43:26,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:26,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 02:43:26,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:26,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:26,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:26,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:26,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:43:26,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933926630] [2020-09-17 02:43:26,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:43:26,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:26,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:43:26,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:43:26,406 INFO L87 Difference]: Start difference. First operand 86 states and 215 transitions. Second operand 27 states. [2020-09-17 02:43:28,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:28,270 INFO L93 Difference]: Finished difference Result 155 states and 355 transitions. [2020-09-17 02:43:28,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:43:28,273 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:43:28,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:28,273 INFO L225 Difference]: With dead ends: 155 [2020-09-17 02:43:28,274 INFO L226 Difference]: Without dead ends: 149 [2020-09-17 02:43:28,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=928, Invalid=2612, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:43:28,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-17 02:43:28,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 89. [2020-09-17 02:43:28,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-17 02:43:28,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2020-09-17 02:43:28,277 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 31 [2020-09-17 02:43:28,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:28,277 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2020-09-17 02:43:28,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:43:28,277 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2020-09-17 02:43:28,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:28,278 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:28,278 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:28,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:28,487 INFO L427 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:28,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:28,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1917433145, now seen corresponding path program 294 times [2020-09-17 02:43:28,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:28,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572403481] [2020-09-17 02:43:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:29,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572403481] [2020-09-17 02:43:29,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338284100] [2020-09-17 02:43:29,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:29,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 02:43:29,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:29,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:29,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:29,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:43:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:29,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:29,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:29,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650862865] [2020-09-17 02:43:29,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:29,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:29,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:29,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:29,420 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand 28 states. [2020-09-17 02:43:31,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:31,532 INFO L93 Difference]: Finished difference Result 152 states and 349 transitions. [2020-09-17 02:43:31,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:43:31,534 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:43:31,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:31,535 INFO L225 Difference]: With dead ends: 152 [2020-09-17 02:43:31,535 INFO L226 Difference]: Without dead ends: 146 [2020-09-17 02:43:31,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=932, Invalid=2728, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:43:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-17 02:43:31,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 88. [2020-09-17 02:43:31,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:43:31,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 221 transitions. [2020-09-17 02:43:31,538 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 221 transitions. Word has length 31 [2020-09-17 02:43:31,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:31,538 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 221 transitions. [2020-09-17 02:43:31,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:43:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 221 transitions. [2020-09-17 02:43:31,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:31,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:31,539 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:31,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:31,740 INFO L427 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:31,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:31,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1969709751, now seen corresponding path program 295 times [2020-09-17 02:43:31,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:31,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911099043] [2020-09-17 02:43:31,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:32,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911099043] [2020-09-17 02:43:32,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057290469] [2020-09-17 02:43:32,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:32,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:32,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:32,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:32,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:43:32,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389050342] [2020-09-17 02:43:32,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:43:32,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:32,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:43:32,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:43:32,563 INFO L87 Difference]: Start difference. First operand 88 states and 221 transitions. Second operand 27 states. [2020-09-17 02:43:34,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:34,545 INFO L93 Difference]: Finished difference Result 153 states and 353 transitions. [2020-09-17 02:43:34,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:43:34,547 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:43:34,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:34,548 INFO L225 Difference]: With dead ends: 153 [2020-09-17 02:43:34,548 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 02:43:34,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 02:43:34,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 02:43:34,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 91. [2020-09-17 02:43:34,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 02:43:34,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 229 transitions. [2020-09-17 02:43:34,550 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 229 transitions. Word has length 31 [2020-09-17 02:43:34,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:34,551 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 229 transitions. [2020-09-17 02:43:34,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:43:34,551 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 229 transitions. [2020-09-17 02:43:34,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:34,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:34,551 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:34,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:34,752 INFO L427 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:34,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:34,753 INFO L82 PathProgramCache]: Analyzing trace with hash -449008101, now seen corresponding path program 296 times [2020-09-17 02:43:34,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:34,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062398749] [2020-09-17 02:43:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:35,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062398749] [2020-09-17 02:43:35,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94850308] [2020-09-17 02:43:35,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:35,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:43:35,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:35,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:35,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:35,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:43:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:35,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:35,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:35,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128968801] [2020-09-17 02:43:35,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:35,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:35,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:35,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:35,633 INFO L87 Difference]: Start difference. First operand 91 states and 229 transitions. Second operand 28 states. [2020-09-17 02:43:37,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:37,938 INFO L93 Difference]: Finished difference Result 150 states and 347 transitions. [2020-09-17 02:43:37,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:43:37,940 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:43:37,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:37,941 INFO L225 Difference]: With dead ends: 150 [2020-09-17 02:43:37,941 INFO L226 Difference]: Without dead ends: 144 [2020-09-17 02:43:37,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=997, Invalid=2909, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:43:37,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-17 02:43:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2020-09-17 02:43:37,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 02:43:37,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 227 transitions. [2020-09-17 02:43:37,943 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 227 transitions. Word has length 31 [2020-09-17 02:43:37,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:37,944 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 227 transitions. [2020-09-17 02:43:37,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:43:37,944 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 227 transitions. [2020-09-17 02:43:37,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:37,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:37,944 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:38,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:38,145 INFO L427 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:38,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:38,146 INFO L82 PathProgramCache]: Analyzing trace with hash 239313689, now seen corresponding path program 297 times [2020-09-17 02:43:38,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:38,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688074808] [2020-09-17 02:43:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:38,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688074808] [2020-09-17 02:43:38,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231980659] [2020-09-17 02:43:38,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:38,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 02:43:38,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:38,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:38,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:38,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:38,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:43:38,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083565823] [2020-09-17 02:43:38,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:43:38,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:38,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:43:38,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:43:38,972 INFO L87 Difference]: Start difference. First operand 90 states and 227 transitions. Second operand 27 states. [2020-09-17 02:43:41,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:41,116 INFO L93 Difference]: Finished difference Result 151 states and 351 transitions. [2020-09-17 02:43:41,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-17 02:43:41,118 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:43:41,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:41,118 INFO L225 Difference]: With dead ends: 151 [2020-09-17 02:43:41,118 INFO L226 Difference]: Without dead ends: 145 [2020-09-17 02:43:41,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1072, Invalid=2960, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 02:43:41,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-17 02:43:41,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 93. [2020-09-17 02:43:41,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:43:41,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 235 transitions. [2020-09-17 02:43:41,121 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 235 transitions. Word has length 31 [2020-09-17 02:43:41,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:41,122 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 235 transitions. [2020-09-17 02:43:41,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:43:41,122 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 235 transitions. [2020-09-17 02:43:41,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:41,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:41,122 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:41,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:41,323 INFO L427 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:41,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:41,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1224505213, now seen corresponding path program 298 times [2020-09-17 02:43:41,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:41,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238182057] [2020-09-17 02:43:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:42,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238182057] [2020-09-17 02:43:42,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404590256] [2020-09-17 02:43:42,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:42,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:43:42,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:42,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:42,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:42,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:43:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:42,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:42,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:42,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152795117] [2020-09-17 02:43:42,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:42,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:42,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:42,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:42,217 INFO L87 Difference]: Start difference. First operand 93 states and 235 transitions. Second operand 28 states. [2020-09-17 02:43:44,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:44,730 INFO L93 Difference]: Finished difference Result 148 states and 345 transitions. [2020-09-17 02:43:44,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:43:44,732 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:43:44,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:44,733 INFO L225 Difference]: With dead ends: 148 [2020-09-17 02:43:44,733 INFO L226 Difference]: Without dead ends: 142 [2020-09-17 02:43:44,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1078, Invalid=3082, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 02:43:44,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-17 02:43:44,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 92. [2020-09-17 02:43:44,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:43:44,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 233 transitions. [2020-09-17 02:43:44,736 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 233 transitions. Word has length 31 [2020-09-17 02:43:44,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:44,737 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 233 transitions. [2020-09-17 02:43:44,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:43:44,737 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 233 transitions. [2020-09-17 02:43:44,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:44,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:44,737 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:44,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-09-17 02:43:44,946 INFO L427 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:44,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:44,947 INFO L82 PathProgramCache]: Analyzing trace with hash -392653829, now seen corresponding path program 299 times [2020-09-17 02:43:44,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:44,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042679384] [2020-09-17 02:43:44,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:45,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042679384] [2020-09-17 02:43:45,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864901095] [2020-09-17 02:43:45,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:45,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 02:43:45,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:45,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:45,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:45,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:45,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:43:45,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292203582] [2020-09-17 02:43:45,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:43:45,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:45,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:43:45,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:43:45,806 INFO L87 Difference]: Start difference. First operand 92 states and 233 transitions. Second operand 27 states. [2020-09-17 02:43:48,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:48,065 INFO L93 Difference]: Finished difference Result 149 states and 349 transitions. [2020-09-17 02:43:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:43:48,067 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:43:48,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:48,068 INFO L225 Difference]: With dead ends: 149 [2020-09-17 02:43:48,068 INFO L226 Difference]: Without dead ends: 143 [2020-09-17 02:43:48,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1168, Invalid=3122, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 02:43:48,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-17 02:43:48,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 95. [2020-09-17 02:43:48,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-17 02:43:48,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 241 transitions. [2020-09-17 02:43:48,071 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 241 transitions. Word has length 31 [2020-09-17 02:43:48,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:48,071 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 241 transitions. [2020-09-17 02:43:48,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:43:48,071 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 241 transitions. [2020-09-17 02:43:48,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:48,072 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:48,072 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:48,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-09-17 02:43:48,273 INFO L427 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:48,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:48,273 INFO L82 PathProgramCache]: Analyzing trace with hash 864235871, now seen corresponding path program 300 times [2020-09-17 02:43:48,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:48,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585098532] [2020-09-17 02:43:48,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:48,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585098532] [2020-09-17 02:43:48,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254273723] [2020-09-17 02:43:48,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:49,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 02:43:49,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:49,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:49,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:49,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:43:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:49,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:49,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:49,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531540997] [2020-09-17 02:43:49,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:49,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:49,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:49,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:49,155 INFO L87 Difference]: Start difference. First operand 95 states and 241 transitions. Second operand 28 states. [2020-09-17 02:43:51,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:51,833 INFO L93 Difference]: Finished difference Result 146 states and 343 transitions. [2020-09-17 02:43:51,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:43:51,835 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:43:51,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:51,836 INFO L225 Difference]: With dead ends: 146 [2020-09-17 02:43:51,836 INFO L226 Difference]: Without dead ends: 140 [2020-09-17 02:43:51,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1175, Invalid=3247, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 02:43:51,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-17 02:43:51,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 94. [2020-09-17 02:43:51,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 02:43:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-09-17 02:43:51,839 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 31 [2020-09-17 02:43:51,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:51,839 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-09-17 02:43:51,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:43:51,839 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-09-17 02:43:51,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:51,840 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:51,840 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:52,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-09-17 02:43:52,040 INFO L427 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:52,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:52,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1814538915, now seen corresponding path program 301 times [2020-09-17 02:43:52,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:52,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069260590] [2020-09-17 02:43:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:52,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069260590] [2020-09-17 02:43:52,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742032622] [2020-09-17 02:43:52,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:52,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:52,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:52,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:52,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:43:52,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886411022] [2020-09-17 02:43:52,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:43:52,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:52,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:43:52,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:43:52,859 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 27 states. [2020-09-17 02:43:55,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:55,346 INFO L93 Difference]: Finished difference Result 147 states and 347 transitions. [2020-09-17 02:43:55,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-17 02:43:55,347 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:43:55,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:55,348 INFO L225 Difference]: With dead ends: 147 [2020-09-17 02:43:55,348 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 02:43:55,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1280, Invalid=3276, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 02:43:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 02:43:55,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 97. [2020-09-17 02:43:55,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-17 02:43:55,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 247 transitions. [2020-09-17 02:43:55,351 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 247 transitions. Word has length 31 [2020-09-17 02:43:55,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:55,351 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 247 transitions. [2020-09-17 02:43:55,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:43:55,351 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 247 transitions. [2020-09-17 02:43:55,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:55,351 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:55,351 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:55,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:55,552 INFO L427 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:55,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:55,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1294795839, now seen corresponding path program 302 times [2020-09-17 02:43:55,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:55,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144341037] [2020-09-17 02:43:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:56,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144341037] [2020-09-17 02:43:56,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348491156] [2020-09-17 02:43:56,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:56,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:43:56,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:56,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:56,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:56,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:43:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:56,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:56,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:56,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204592413] [2020-09-17 02:43:56,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:56,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:56,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:56,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:56,415 INFO L87 Difference]: Start difference. First operand 97 states and 247 transitions. Second operand 28 states. [2020-09-17 02:43:59,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:59,307 INFO L93 Difference]: Finished difference Result 144 states and 341 transitions. [2020-09-17 02:43:59,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 02:43:59,309 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:43:59,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:59,309 INFO L225 Difference]: With dead ends: 144 [2020-09-17 02:43:59,309 INFO L226 Difference]: Without dead ends: 138 [2020-09-17 02:43:59,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1288, Invalid=3404, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 02:43:59,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-17 02:43:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 96. [2020-09-17 02:43:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-17 02:43:59,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 245 transitions. [2020-09-17 02:43:59,312 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 245 transitions. Word has length 31 [2020-09-17 02:43:59,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:59,313 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 245 transitions. [2020-09-17 02:43:59,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:43:59,313 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 245 transitions. [2020-09-17 02:43:59,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:59,313 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:59,313 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:59,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-09-17 02:43:59,514 INFO L427 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:59,515 INFO L82 PathProgramCache]: Analyzing trace with hash 360515391, now seen corresponding path program 303 times [2020-09-17 02:43:59,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:59,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521373954] [2020-09-17 02:43:59,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:00,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521373954] [2020-09-17 02:44:00,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706921198] [2020-09-17 02:44:00,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:00,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 02:44:00,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:00,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:44:00,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:00,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:00,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:44:00,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399576167] [2020-09-17 02:44:00,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:44:00,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:00,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:44:00,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:44:00,336 INFO L87 Difference]: Start difference. First operand 96 states and 245 transitions. Second operand 27 states. [2020-09-17 02:44:02,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:02,917 INFO L93 Difference]: Finished difference Result 145 states and 345 transitions. [2020-09-17 02:44:02,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-17 02:44:02,919 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:44:02,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:02,919 INFO L225 Difference]: With dead ends: 145 [2020-09-17 02:44:02,919 INFO L226 Difference]: Without dead ends: 139 [2020-09-17 02:44:02,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1408, Invalid=3422, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 02:44:02,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-17 02:44:02,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 99. [2020-09-17 02:44:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:44:02,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:44:02,922 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 31 [2020-09-17 02:44:02,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:02,922 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:44:02,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:44:02,923 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:44:02,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:44:02,923 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:02,923 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:03,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:03,124 INFO L427 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:03,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:03,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1359612253, now seen corresponding path program 304 times [2020-09-17 02:44:03,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:03,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36718358] [2020-09-17 02:44:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:03,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36718358] [2020-09-17 02:44:03,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125146634] [2020-09-17 02:44:03,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:03,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:44:03,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:03,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:44:03,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:03,957 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:44:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:03,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:03,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:44:03,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236553456] [2020-09-17 02:44:03,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:44:03,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:03,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:44:03,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:44:03,996 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 28 states. [2020-09-17 02:44:07,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:07,055 INFO L93 Difference]: Finished difference Result 142 states and 339 transitions. [2020-09-17 02:44:07,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 02:44:07,057 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:44:07,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:07,058 INFO L225 Difference]: With dead ends: 142 [2020-09-17 02:44:07,058 INFO L226 Difference]: Without dead ends: 136 [2020-09-17 02:44:07,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1417, Invalid=3553, Unknown=0, NotChecked=0, Total=4970 [2020-09-17 02:44:07,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-17 02:44:07,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 98. [2020-09-17 02:44:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:44:07,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:44:07,061 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 31 [2020-09-17 02:44:07,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:07,061 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:44:07,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:44:07,061 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:44:07,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:44:07,061 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:07,061 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:07,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2020-09-17 02:44:07,262 INFO L427 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:07,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:07,263 INFO L82 PathProgramCache]: Analyzing trace with hash -888616543, now seen corresponding path program 305 times [2020-09-17 02:44:07,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:07,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821978856] [2020-09-17 02:44:07,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:07,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821978856] [2020-09-17 02:44:07,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879296963] [2020-09-17 02:44:07,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:08,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 02:44:08,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:08,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:44:08,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:08,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:08,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:44:08,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049997997] [2020-09-17 02:44:08,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:44:08,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:08,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:44:08,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:44:08,108 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 27 states. [2020-09-17 02:44:10,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:10,930 INFO L93 Difference]: Finished difference Result 143 states and 343 transitions. [2020-09-17 02:44:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-17 02:44:10,932 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:44:10,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:10,933 INFO L225 Difference]: With dead ends: 143 [2020-09-17 02:44:10,933 INFO L226 Difference]: Without dead ends: 137 [2020-09-17 02:44:10,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1552, Invalid=3560, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 02:44:10,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-17 02:44:10,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 101. [2020-09-17 02:44:10,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-17 02:44:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 259 transitions. [2020-09-17 02:44:10,936 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 259 transitions. Word has length 31 [2020-09-17 02:44:10,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:10,936 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 259 transitions. [2020-09-17 02:44:10,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:44:10,936 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 259 transitions. [2020-09-17 02:44:10,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:44:10,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:10,936 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:11,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:11,137 INFO L427 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:11,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:11,138 INFO L82 PathProgramCache]: Analyzing trace with hash -872529403, now seen corresponding path program 306 times [2020-09-17 02:44:11,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:11,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987322324] [2020-09-17 02:44:11,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:11,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987322324] [2020-09-17 02:44:11,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789181870] [2020-09-17 02:44:11,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:11,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 02:44:11,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:11,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:44:11,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:11,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:44:12,001 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:12,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:12,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:44:12,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71315694] [2020-09-17 02:44:12,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:44:12,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:12,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:44:12,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:44:12,002 INFO L87 Difference]: Start difference. First operand 101 states and 259 transitions. Second operand 28 states. [2020-09-17 02:44:15,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:15,252 INFO L93 Difference]: Finished difference Result 140 states and 337 transitions. [2020-09-17 02:44:15,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 02:44:15,254 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:44:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:15,254 INFO L225 Difference]: With dead ends: 140 [2020-09-17 02:44:15,254 INFO L226 Difference]: Without dead ends: 134 [2020-09-17 02:44:15,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1562, Invalid=3694, Unknown=0, NotChecked=0, Total=5256 [2020-09-17 02:44:15,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-17 02:44:15,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 100. [2020-09-17 02:44:15,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 02:44:15,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-09-17 02:44:15,256 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 31 [2020-09-17 02:44:15,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:15,257 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-09-17 02:44:15,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:44:15,264 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-09-17 02:44:15,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:44:15,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:15,264 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:15,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:15,465 INFO L427 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:15,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:15,466 INFO L82 PathProgramCache]: Analyzing trace with hash -872039293, now seen corresponding path program 307 times [2020-09-17 02:44:15,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:15,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949689443] [2020-09-17 02:44:15,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:16,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949689443] [2020-09-17 02:44:16,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484304851] [2020-09-17 02:44:16,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:16,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:44:16,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:16,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:16,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:44:16,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394850553] [2020-09-17 02:44:16,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:44:16,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:16,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:44:16,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:44:16,296 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 27 states. [2020-09-17 02:44:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:19,130 INFO L93 Difference]: Finished difference Result 160 states and 387 transitions. [2020-09-17 02:44:19,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-17 02:44:19,133 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:44:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:19,133 INFO L225 Difference]: With dead ends: 160 [2020-09-17 02:44:19,133 INFO L226 Difference]: Without dead ends: 154 [2020-09-17 02:44:19,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1712, Invalid=3690, Unknown=0, NotChecked=0, Total=5402 [2020-09-17 02:44:19,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-17 02:44:19,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 106. [2020-09-17 02:44:19,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-17 02:44:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 277 transitions. [2020-09-17 02:44:19,136 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 277 transitions. Word has length 31 [2020-09-17 02:44:19,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:19,137 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 277 transitions. [2020-09-17 02:44:19,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:44:19,137 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 277 transitions. [2020-09-17 02:44:19,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:44:19,137 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:19,137 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:19,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2020-09-17 02:44:19,338 INFO L427 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:19,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:19,339 INFO L82 PathProgramCache]: Analyzing trace with hash -872022553, now seen corresponding path program 308 times [2020-09-17 02:44:19,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:19,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533706575] [2020-09-17 02:44:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:20,038 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:20,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533706575] [2020-09-17 02:44:20,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205050944] [2020-09-17 02:44:20,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:20,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:44:20,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:20,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:44:20,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:20,168 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:44:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:20,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:20,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:44:20,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051708052] [2020-09-17 02:44:20,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:44:20,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:20,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:44:20,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:44:20,208 INFO L87 Difference]: Start difference. First operand 106 states and 277 transitions. Second operand 28 states. [2020-09-17 02:44:23,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:23,559 INFO L93 Difference]: Finished difference Result 141 states and 343 transitions. [2020-09-17 02:44:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 02:44:23,562 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:44:23,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:23,562 INFO L225 Difference]: With dead ends: 141 [2020-09-17 02:44:23,563 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 02:44:23,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1723, Invalid=3827, Unknown=0, NotChecked=0, Total=5550 [2020-09-17 02:44:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 02:44:23,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 103. [2020-09-17 02:44:23,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-17 02:44:23,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-09-17 02:44:23,565 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-09-17 02:44:23,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:23,565 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-09-17 02:44:23,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:44:23,566 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-09-17 02:44:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:23,566 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:23,566 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:23,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:23,767 INFO L427 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:23,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:23,767 INFO L82 PathProgramCache]: Analyzing trace with hash 470887608, now seen corresponding path program 309 times [2020-09-17 02:44:23,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:23,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546966331] [2020-09-17 02:44:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:24,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546966331] [2020-09-17 02:44:24,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253179057] [2020-09-17 02:44:24,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:24,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 02:44:24,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:24,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:24,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:24,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:24,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:44:24,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928623212] [2020-09-17 02:44:24,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:44:24,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:24,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:44:24,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:44:24,877 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 28 states. [2020-09-17 02:44:26,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:26,434 INFO L93 Difference]: Finished difference Result 164 states and 387 transitions. [2020-09-17 02:44:26,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:44:26,436 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:44:26,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:26,436 INFO L225 Difference]: With dead ends: 164 [2020-09-17 02:44:26,437 INFO L226 Difference]: Without dead ends: 158 [2020-09-17 02:44:26,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=841, Invalid=1915, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:44:26,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-09-17 02:44:26,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 105. [2020-09-17 02:44:26,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:44:26,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:44:26,439 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:44:26,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:26,439 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:44:26,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:44:26,440 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:44:26,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:26,440 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:26,440 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:26,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-09-17 02:44:26,641 INFO L427 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:26,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:26,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1353020644, now seen corresponding path program 310 times [2020-09-17 02:44:26,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:26,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399538296] [2020-09-17 02:44:26,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:27,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399538296] [2020-09-17 02:44:27,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341322488] [2020-09-17 02:44:27,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:27,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:44:27,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:27,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:27,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:27,783 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:44:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:27,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:27,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:44:27,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671516338] [2020-09-17 02:44:27,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:44:27,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:27,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:44:27,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:44:27,805 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:44:29,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:29,637 INFO L93 Difference]: Finished difference Result 161 states and 381 transitions. [2020-09-17 02:44:29,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:44:29,639 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:44:29,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:29,640 INFO L225 Difference]: With dead ends: 161 [2020-09-17 02:44:29,640 INFO L226 Difference]: Without dead ends: 155 [2020-09-17 02:44:29,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=897, Invalid=2183, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:44:29,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-17 02:44:29,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 104. [2020-09-17 02:44:29,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:44:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:44:29,643 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:44:29,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:29,643 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:44:29,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:44:29,643 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:44:29,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:29,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:29,643 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:29,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-09-17 02:44:29,844 INFO L427 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:29,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:29,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2116672154, now seen corresponding path program 311 times [2020-09-17 02:44:29,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:29,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687604978] [2020-09-17 02:44:29,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:30,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687604978] [2020-09-17 02:44:30,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709453487] [2020-09-17 02:44:30,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:30,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 02:44:30,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:30,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:30,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:30,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:30,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:44:30,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759126530] [2020-09-17 02:44:30,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:44:30,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:30,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:44:30,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:44:30,910 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:44:32,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:32,569 INFO L93 Difference]: Finished difference Result 158 states and 375 transitions. [2020-09-17 02:44:32,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:44:32,571 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:44:32,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:32,572 INFO L225 Difference]: With dead ends: 158 [2020-09-17 02:44:32,572 INFO L226 Difference]: Without dead ends: 152 [2020-09-17 02:44:32,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=842, Invalid=2128, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:44:32,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-17 02:44:32,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 105. [2020-09-17 02:44:32,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:44:32,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:44:32,575 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:44:32,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:32,575 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:44:32,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:44:32,575 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:44:32,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:32,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:32,575 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:32,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-09-17 02:44:32,776 INFO L427 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:32,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1077903870, now seen corresponding path program 312 times [2020-09-17 02:44:32,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:32,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824513654] [2020-09-17 02:44:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:33,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824513654] [2020-09-17 02:44:33,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018272355] [2020-09-17 02:44:33,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:33,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 02:44:33,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:33,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:33,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:33,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:44:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:33,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:33,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:44:33,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110525008] [2020-09-17 02:44:33,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:44:33,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:33,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:44:33,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:44:33,909 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:44:35,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:35,918 INFO L93 Difference]: Finished difference Result 157 states and 373 transitions. [2020-09-17 02:44:35,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:44:35,921 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:44:35,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:35,921 INFO L225 Difference]: With dead ends: 157 [2020-09-17 02:44:35,922 INFO L226 Difference]: Without dead ends: 151 [2020-09-17 02:44:35,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=905, Invalid=2401, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:44:35,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-17 02:44:35,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 104. [2020-09-17 02:44:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:44:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:44:35,924 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:44:35,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:35,925 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:44:35,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:44:35,925 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:44:35,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:35,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:35,925 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:36,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-09-17 02:44:36,126 INFO L427 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:36,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:36,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1492687100, now seen corresponding path program 313 times [2020-09-17 02:44:36,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:36,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443348090] [2020-09-17 02:44:36,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:37,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443348090] [2020-09-17 02:44:37,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489935377] [2020-09-17 02:44:37,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:37,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:37,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:37,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:37,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:44:37,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093544908] [2020-09-17 02:44:37,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:44:37,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:37,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:44:37,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:44:37,148 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:44:38,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:38,997 INFO L93 Difference]: Finished difference Result 154 states and 367 transitions. [2020-09-17 02:44:38,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:44:38,999 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:44:39,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:39,000 INFO L225 Difference]: With dead ends: 154 [2020-09-17 02:44:39,000 INFO L226 Difference]: Without dead ends: 148 [2020-09-17 02:44:39,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=859, Invalid=2333, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:44:39,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-17 02:44:39,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 105. [2020-09-17 02:44:39,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:44:39,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:44:39,003 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:44:39,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:39,003 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:44:39,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:44:39,003 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:44:39,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:39,004 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:39,004 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:39,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:39,205 INFO L427 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:39,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:39,205 INFO L82 PathProgramCache]: Analyzing trace with hash -229062304, now seen corresponding path program 314 times [2020-09-17 02:44:39,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:39,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034413727] [2020-09-17 02:44:39,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:40,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034413727] [2020-09-17 02:44:40,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477890434] [2020-09-17 02:44:40,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:40,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:44:40,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:40,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:40,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:40,286 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:44:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:40,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:40,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:44:40,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681555154] [2020-09-17 02:44:40,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:44:40,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:40,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:44:40,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:44:40,312 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:44:42,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:42,578 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-09-17 02:44:42,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:44:42,581 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:44:42,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:42,582 INFO L225 Difference]: With dead ends: 153 [2020-09-17 02:44:42,582 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 02:44:42,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:44:42,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 02:44:42,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 104. [2020-09-17 02:44:42,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:44:42,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:44:42,585 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:44:42,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:42,586 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:44:42,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:44:42,586 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:44:42,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:42,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:42,586 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:42,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-09-17 02:44:42,787 INFO L427 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:42,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:42,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1412986914, now seen corresponding path program 315 times [2020-09-17 02:44:42,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:42,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043556986] [2020-09-17 02:44:42,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:43,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043556986] [2020-09-17 02:44:43,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928360948] [2020-09-17 02:44:43,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:43,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 02:44:43,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:43,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:43,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:43,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:43,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:44:43,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512759299] [2020-09-17 02:44:43,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:44:43,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:43,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:44:43,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:44:43,787 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:44:45,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:45,800 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-09-17 02:44:45,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:44:45,803 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:44:45,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:45,803 INFO L225 Difference]: With dead ends: 150 [2020-09-17 02:44:45,803 INFO L226 Difference]: Without dead ends: 144 [2020-09-17 02:44:45,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 02:44:45,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-17 02:44:45,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 105. [2020-09-17 02:44:45,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:44:45,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:44:45,806 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:44:45,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:45,806 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:44:45,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:44:45,806 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:44:45,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:45,807 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:45,807 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:46,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-09-17 02:44:46,008 INFO L427 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:46,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:46,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1333821762, now seen corresponding path program 316 times [2020-09-17 02:44:46,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:46,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901127387] [2020-09-17 02:44:46,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:46,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901127387] [2020-09-17 02:44:46,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790154858] [2020-09-17 02:44:46,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:46,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:44:46,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:46,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:46,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:47,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:44:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:47,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:47,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:44:47,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087787567] [2020-09-17 02:44:47,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:44:47,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:47,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:44:47,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:44:47,085 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:44:49,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:49,517 INFO L93 Difference]: Finished difference Result 149 states and 357 transitions. [2020-09-17 02:44:49,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:44:49,519 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:44:49,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:49,520 INFO L225 Difference]: With dead ends: 149 [2020-09-17 02:44:49,520 INFO L226 Difference]: Without dead ends: 143 [2020-09-17 02:44:49,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=969, Invalid=2813, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 02:44:49,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-17 02:44:49,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2020-09-17 02:44:49,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:44:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:44:49,523 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:44:49,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:49,523 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:44:49,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:44:49,523 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:44:49,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:49,523 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:49,524 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:49,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2020-09-17 02:44:49,724 INFO L427 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:49,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:49,725 INFO L82 PathProgramCache]: Analyzing trace with hash 32032576, now seen corresponding path program 317 times [2020-09-17 02:44:49,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:49,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739144303] [2020-09-17 02:44:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:50,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739144303] [2020-09-17 02:44:50,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016237423] [2020-09-17 02:44:50,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:50,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 02:44:50,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:50,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:50,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:50,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:50,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:44:50,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908245108] [2020-09-17 02:44:50,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:44:50,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:50,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:44:50,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:44:50,717 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:44:52,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:52,876 INFO L93 Difference]: Finished difference Result 146 states and 351 transitions. [2020-09-17 02:44:52,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:44:52,878 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:44:52,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:52,879 INFO L225 Difference]: With dead ends: 146 [2020-09-17 02:44:52,879 INFO L226 Difference]: Without dead ends: 140 [2020-09-17 02:44:52,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=941, Invalid=2719, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:44:52,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-17 02:44:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 105. [2020-09-17 02:44:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:44:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:44:52,882 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:44:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:52,882 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:44:52,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:44:52,882 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:44:52,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:52,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:52,883 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:53,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:53,083 INFO L427 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:53,084 INFO L82 PathProgramCache]: Analyzing trace with hash -778516060, now seen corresponding path program 318 times [2020-09-17 02:44:53,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:53,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704636866] [2020-09-17 02:44:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:53,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704636866] [2020-09-17 02:44:53,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924767208] [2020-09-17 02:44:53,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:54,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 02:44:54,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:54,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:54,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:54,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:44:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:54,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:54,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:44:54,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135941396] [2020-09-17 02:44:54,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:44:54,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:54,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:44:54,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:44:54,123 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:44:56,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:56,700 INFO L93 Difference]: Finished difference Result 145 states and 349 transitions. [2020-09-17 02:44:56,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:44:56,703 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:44:56,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:56,703 INFO L225 Difference]: With dead ends: 145 [2020-09-17 02:44:56,703 INFO L226 Difference]: Without dead ends: 139 [2020-09-17 02:44:56,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 02:44:56,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-17 02:44:56,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 104. [2020-09-17 02:44:56,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:44:56,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:44:56,706 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:44:56,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:56,706 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:44:56,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:44:56,707 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:44:56,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:56,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:56,707 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:56,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:56,908 INFO L427 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:56,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:56,908 INFO L82 PathProgramCache]: Analyzing trace with hash -726239454, now seen corresponding path program 319 times [2020-09-17 02:44:56,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:56,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177355300] [2020-09-17 02:44:56,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:57,761 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:57,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177355300] [2020-09-17 02:44:57,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136444541] [2020-09-17 02:44:57,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:57,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:57,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:57,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:57,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:44:57,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328711406] [2020-09-17 02:44:57,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:44:57,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:57,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:44:57,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:44:57,875 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:45:00,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:00,260 INFO L93 Difference]: Finished difference Result 142 states and 343 transitions. [2020-09-17 02:45:00,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:45:00,262 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:45:00,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:00,263 INFO L225 Difference]: With dead ends: 142 [2020-09-17 02:45:00,263 INFO L226 Difference]: Without dead ends: 136 [2020-09-17 02:45:00,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1006, Invalid=2900, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:45:00,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-17 02:45:00,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 105. [2020-09-17 02:45:00,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:45:00,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:45:00,266 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:45:00,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:00,267 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:45:00,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:45:00,267 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:45:00,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:00,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:00,267 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:00,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2020-09-17 02:45:00,475 INFO L427 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:00,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:00,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1150009990, now seen corresponding path program 320 times [2020-09-17 02:45:00,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:00,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877205722] [2020-09-17 02:45:00,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:01,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877205722] [2020-09-17 02:45:01,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658326049] [2020-09-17 02:45:01,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:01,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:45:01,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:01,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:01,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:01,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:45:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:01,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:01,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:45:01,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873715419] [2020-09-17 02:45:01,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:45:01,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:01,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:45:01,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:45:01,491 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:45:04,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:04,316 INFO L93 Difference]: Finished difference Result 141 states and 341 transitions. [2020-09-17 02:45:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:45:04,319 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:45:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:04,319 INFO L225 Difference]: With dead ends: 141 [2020-09-17 02:45:04,319 INFO L226 Difference]: Without dead ends: 135 [2020-09-17 02:45:04,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1097, Invalid=3193, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 02:45:04,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-17 02:45:04,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2020-09-17 02:45:04,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:45:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:45:04,323 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:45:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:04,323 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:45:04,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:45:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:45:04,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:04,323 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:04,323 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:04,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2020-09-17 02:45:04,524 INFO L427 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:04,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:04,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1838331780, now seen corresponding path program 321 times [2020-09-17 02:45:04,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:04,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826570041] [2020-09-17 02:45:04,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:05,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826570041] [2020-09-17 02:45:05,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595329843] [2020-09-17 02:45:05,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:05,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 02:45:05,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:05,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:05,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:05,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:05,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:45:05,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748519110] [2020-09-17 02:45:05,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:45:05,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:05,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:45:05,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:45:05,471 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:45:07,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:07,981 INFO L93 Difference]: Finished difference Result 138 states and 335 transitions. [2020-09-17 02:45:07,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-17 02:45:07,983 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:45:07,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:07,984 INFO L225 Difference]: With dead ends: 138 [2020-09-17 02:45:07,984 INFO L226 Difference]: Without dead ends: 132 [2020-09-17 02:45:07,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1087, Invalid=3073, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 02:45:07,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-17 02:45:07,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 105. [2020-09-17 02:45:07,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:45:07,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:45:07,986 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:45:07,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:07,987 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:45:07,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:45:07,987 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:45:07,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:07,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:07,987 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:08,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2020-09-17 02:45:08,188 INFO L427 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:08,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:08,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1471443992, now seen corresponding path program 322 times [2020-09-17 02:45:08,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:08,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767692476] [2020-09-17 02:45:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:09,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767692476] [2020-09-17 02:45:09,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852254381] [2020-09-17 02:45:09,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:09,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:45:09,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:09,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:09,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:09,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:45:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:09,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:09,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:45:09,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275357920] [2020-09-17 02:45:09,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:45:09,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:09,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:45:09,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:45:09,186 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:45:12,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:12,239 INFO L93 Difference]: Finished difference Result 137 states and 333 transitions. [2020-09-17 02:45:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:45:12,241 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:45:12,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:12,242 INFO L225 Difference]: With dead ends: 137 [2020-09-17 02:45:12,242 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:45:12,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1185, Invalid=3371, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 02:45:12,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:45:12,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 104. [2020-09-17 02:45:12,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:45:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:45:12,246 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:45:12,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:12,246 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:45:12,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:45:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:45:12,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:12,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:12,247 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:12,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2020-09-17 02:45:12,456 INFO L427 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:12,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1206364262, now seen corresponding path program 323 times [2020-09-17 02:45:12,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:12,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863893476] [2020-09-17 02:45:12,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:13,271 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:13,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863893476] [2020-09-17 02:45:13,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625229784] [2020-09-17 02:45:13,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:13,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 02:45:13,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:13,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:13,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:13,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:13,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:45:13,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650078749] [2020-09-17 02:45:13,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:45:13,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:13,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:45:13,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:45:13,400 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:45:16,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:16,225 INFO L93 Difference]: Finished difference Result 134 states and 327 transitions. [2020-09-17 02:45:16,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:45:16,228 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:45:16,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:16,228 INFO L225 Difference]: With dead ends: 134 [2020-09-17 02:45:16,228 INFO L226 Difference]: Without dead ends: 128 [2020-09-17 02:45:16,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1184, Invalid=3238, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 02:45:16,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-17 02:45:16,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2020-09-17 02:45:16,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:45:16,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:45:16,231 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:45:16,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:16,231 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:45:16,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:45:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:45:16,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:16,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:16,232 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:16,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:16,433 INFO L427 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:16,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1831713334, now seen corresponding path program 324 times [2020-09-17 02:45:16,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:16,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452843130] [2020-09-17 02:45:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:17,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452843130] [2020-09-17 02:45:17,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475952850] [2020-09-17 02:45:17,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:17,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 02:45:17,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:17,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:17,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:17,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:45:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:17,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:17,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:45:17,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50283034] [2020-09-17 02:45:17,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:45:17,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:17,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:45:17,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:45:17,441 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:45:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:20,730 INFO L93 Difference]: Finished difference Result 133 states and 325 transitions. [2020-09-17 02:45:20,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 02:45:20,732 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:45:20,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:20,733 INFO L225 Difference]: With dead ends: 133 [2020-09-17 02:45:20,733 INFO L226 Difference]: Without dead ends: 127 [2020-09-17 02:45:20,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1289, Invalid=3541, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 02:45:20,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-17 02:45:20,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2020-09-17 02:45:20,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:45:20,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:45:20,736 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:45:20,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:20,736 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:45:20,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:45:20,736 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:45:20,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:20,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:20,737 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:20,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2020-09-17 02:45:20,937 INFO L427 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:20,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:20,938 INFO L82 PathProgramCache]: Analyzing trace with hash -215520824, now seen corresponding path program 325 times [2020-09-17 02:45:20,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:20,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188575219] [2020-09-17 02:45:20,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:21,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188575219] [2020-09-17 02:45:21,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100541410] [2020-09-17 02:45:21,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:21,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:21,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:21,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:21,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:45:21,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109947430] [2020-09-17 02:45:21,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:45:21,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:21,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:45:21,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:45:21,892 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:45:24,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:24,726 INFO L93 Difference]: Finished difference Result 130 states and 319 transitions. [2020-09-17 02:45:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-17 02:45:24,728 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:45:24,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:24,729 INFO L225 Difference]: With dead ends: 130 [2020-09-17 02:45:24,729 INFO L226 Difference]: Without dead ends: 124 [2020-09-17 02:45:24,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1297, Invalid=3395, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 02:45:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-17 02:45:24,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2020-09-17 02:45:24,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:45:24,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:45:24,733 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:45:24,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:24,733 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:45:24,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:45:24,733 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:45:24,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:24,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:24,734 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:24,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:24,934 INFO L427 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:24,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:24,935 INFO L82 PathProgramCache]: Analyzing trace with hash 304222252, now seen corresponding path program 326 times [2020-09-17 02:45:24,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:24,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382980466] [2020-09-17 02:45:24,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:25,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382980466] [2020-09-17 02:45:25,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202261878] [2020-09-17 02:45:25,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:25,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:45:25,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:25,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:25,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:25,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:45:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:25,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:25,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:45:25,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143687619] [2020-09-17 02:45:25,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:45:25,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:25,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:45:25,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:45:25,931 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:45:29,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:29,556 INFO L93 Difference]: Finished difference Result 129 states and 317 transitions. [2020-09-17 02:45:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 02:45:29,559 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:45:29,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:29,559 INFO L225 Difference]: With dead ends: 129 [2020-09-17 02:45:29,560 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 02:45:29,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1409, Invalid=3703, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 02:45:29,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 02:45:29,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2020-09-17 02:45:29,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:45:29,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:45:29,562 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:45:29,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:29,562 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:45:29,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:45:29,563 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:45:29,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:29,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:29,563 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:29,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2020-09-17 02:45:29,764 INFO L427 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:29,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:29,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1959533482, now seen corresponding path program 327 times [2020-09-17 02:45:29,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:29,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092116649] [2020-09-17 02:45:29,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:30,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092116649] [2020-09-17 02:45:30,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011288304] [2020-09-17 02:45:30,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:30,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 02:45:30,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:30,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:30,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:30,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:30,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:45:30,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134421265] [2020-09-17 02:45:30,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:45:30,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:30,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:45:30,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:45:30,718 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:45:33,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:33,802 INFO L93 Difference]: Finished difference Result 126 states and 311 transitions. [2020-09-17 02:45:33,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-17 02:45:33,804 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:45:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:33,804 INFO L225 Difference]: With dead ends: 126 [2020-09-17 02:45:33,804 INFO L226 Difference]: Without dead ends: 120 [2020-09-17 02:45:33,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1426, Invalid=3544, Unknown=0, NotChecked=0, Total=4970 [2020-09-17 02:45:33,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-17 02:45:33,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 105. [2020-09-17 02:45:33,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:45:33,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:45:33,806 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:45:33,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:33,807 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:45:33,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:45:33,807 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:45:33,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:33,807 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:33,807 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:34,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:34,008 INFO L427 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:34,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:34,009 INFO L82 PathProgramCache]: Analyzing trace with hash 239405838, now seen corresponding path program 328 times [2020-09-17 02:45:34,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:34,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763247693] [2020-09-17 02:45:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:34,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763247693] [2020-09-17 02:45:34,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787082145] [2020-09-17 02:45:34,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:34,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:45:34,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:34,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:34,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:34,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:45:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:34,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:34,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:45:34,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148986530] [2020-09-17 02:45:34,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:45:34,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:34,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:45:34,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:45:34,998 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:45:38,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:38,752 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-09-17 02:45:38,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 02:45:38,754 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:45:38,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:38,755 INFO L225 Difference]: With dead ends: 125 [2020-09-17 02:45:38,755 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 02:45:38,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1545, Invalid=3857, Unknown=0, NotChecked=0, Total=5402 [2020-09-17 02:45:38,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 02:45:38,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2020-09-17 02:45:38,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:45:38,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:45:38,758 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:45:38,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:38,758 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:45:38,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:45:38,758 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:45:38,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:38,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:38,758 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:38,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2020-09-17 02:45:38,959 INFO L427 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:38,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:38,960 INFO L82 PathProgramCache]: Analyzing trace with hash 710401548, now seen corresponding path program 329 times [2020-09-17 02:45:38,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:38,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695110899] [2020-09-17 02:45:38,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:39,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695110899] [2020-09-17 02:45:39,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978703968] [2020-09-17 02:45:39,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:39,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 02:45:39,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:39,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:39,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:39,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:39,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:45:39,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838978994] [2020-09-17 02:45:39,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:45:39,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:39,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:45:39,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:45:39,936 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:45:43,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:43,294 INFO L93 Difference]: Finished difference Result 122 states and 303 transitions. [2020-09-17 02:45:43,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-17 02:45:43,296 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:45:43,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:43,297 INFO L225 Difference]: With dead ends: 122 [2020-09-17 02:45:43,297 INFO L226 Difference]: Without dead ends: 116 [2020-09-17 02:45:43,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1571, Invalid=3685, Unknown=0, NotChecked=0, Total=5256 [2020-09-17 02:45:43,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-17 02:45:43,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2020-09-17 02:45:43,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:45:43,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:45:43,300 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:45:43,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:43,300 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:45:43,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:45:43,300 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:45:43,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:43,301 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:43,301 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:43,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:43,501 INFO L427 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:43,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:43,502 INFO L82 PathProgramCache]: Analyzing trace with hash 726488688, now seen corresponding path program 330 times [2020-09-17 02:45:43,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:43,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446581879] [2020-09-17 02:45:43,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:44,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446581879] [2020-09-17 02:45:44,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665464062] [2020-09-17 02:45:44,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:44,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 02:45:44,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:44,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:44,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:44,491 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:45:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:44,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:44,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:45:44,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184647513] [2020-09-17 02:45:44,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:45:44,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:44,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:45:44,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:45:44,545 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:45:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:48,587 INFO L93 Difference]: Finished difference Result 121 states and 301 transitions. [2020-09-17 02:45:48,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 02:45:48,589 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:45:48,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:48,590 INFO L225 Difference]: With dead ends: 121 [2020-09-17 02:45:48,590 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 02:45:48,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1697, Invalid=4003, Unknown=0, NotChecked=0, Total=5700 [2020-09-17 02:45:48,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 02:45:48,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-09-17 02:45:48,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:45:48,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:45:48,593 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:45:48,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:48,593 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:45:48,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:45:48,593 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:45:48,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:48,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:48,593 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:48,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:48,794 INFO L427 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:48,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:48,795 INFO L82 PathProgramCache]: Analyzing trace with hash 726978798, now seen corresponding path program 331 times [2020-09-17 02:45:48,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:48,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313381808] [2020-09-17 02:45:48,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:49,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313381808] [2020-09-17 02:45:49,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484223827] [2020-09-17 02:45:49,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:49,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:49,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:49,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:49,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:45:49,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445333607] [2020-09-17 02:45:49,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:45:49,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:49,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:45:49,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:45:49,798 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:45:53,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:53,283 INFO L93 Difference]: Finished difference Result 137 states and 341 transitions. [2020-09-17 02:45:53,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-17 02:45:53,286 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:45:53,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:53,286 INFO L225 Difference]: With dead ends: 137 [2020-09-17 02:45:53,286 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:45:53,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1732, Invalid=3818, Unknown=0, NotChecked=0, Total=5550 [2020-09-17 02:45:53,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:45:53,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 108. [2020-09-17 02:45:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-17 02:45:53,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 281 transitions. [2020-09-17 02:45:53,289 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 281 transitions. Word has length 32 [2020-09-17 02:45:53,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:53,289 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 281 transitions. [2020-09-17 02:45:53,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:45:53,290 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 281 transitions. [2020-09-17 02:45:53,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:53,290 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:53,290 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:53,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2020-09-17 02:45:53,491 INFO L427 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:53,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:53,491 INFO L82 PathProgramCache]: Analyzing trace with hash 726995538, now seen corresponding path program 332 times [2020-09-17 02:45:53,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:53,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854394154] [2020-09-17 02:45:53,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:54,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854394154] [2020-09-17 02:45:54,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853266777] [2020-09-17 02:45:54,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:54,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:45:54,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:54,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:45:54,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:54,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:54,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:45:54,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560731881] [2020-09-17 02:45:54,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:45:54,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:54,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:45:54,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:45:54,550 INFO L87 Difference]: Start difference. First operand 108 states and 281 transitions. Second operand 29 states. [2020-09-17 02:45:58,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:58,484 INFO L93 Difference]: Finished difference Result 116 states and 293 transitions. [2020-09-17 02:45:58,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 02:45:58,486 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:45:58,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:58,487 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:45:58,487 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:45:58,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1572, Invalid=4128, Unknown=0, NotChecked=0, Total=5700 [2020-09-17 02:45:58,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:45:58,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2020-09-17 02:45:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 02:45:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 188 transitions. [2020-09-17 02:45:58,489 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 188 transitions. Word has length 32 [2020-09-17 02:45:58,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:58,490 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 188 transitions. [2020-09-17 02:45:58,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:45:58,490 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 188 transitions. [2020-09-17 02:45:58,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:58,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:58,490 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:58,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2020-09-17 02:45:58,691 INFO L427 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:58,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:58,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1262879060, now seen corresponding path program 333 times [2020-09-17 02:45:58,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:58,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685687302] [2020-09-17 02:45:58,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:59,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685687302] [2020-09-17 02:45:59,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250070021] [2020-09-17 02:45:59,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:59,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 02:45:59,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:59,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:59,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:59,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:45:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:59,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:59,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:45:59,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987693320] [2020-09-17 02:45:59,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:45:59,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:59,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:45:59,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:45:59,767 INFO L87 Difference]: Start difference. First operand 77 states and 188 transitions. Second operand 29 states. [2020-09-17 02:46:03,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:03,692 INFO L93 Difference]: Finished difference Result 140 states and 343 transitions. [2020-09-17 02:46:03,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-17 02:46:03,695 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:46:03,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:03,696 INFO L225 Difference]: With dead ends: 140 [2020-09-17 02:46:03,696 INFO L226 Difference]: Without dead ends: 135 [2020-09-17 02:46:03,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1930, Invalid=4076, Unknown=0, NotChecked=0, Total=6006 [2020-09-17 02:46:03,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-17 02:46:03,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2020-09-17 02:46:03,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-17 02:46:03,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-09-17 02:46:03,698 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 32 [2020-09-17 02:46:03,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:03,698 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-09-17 02:46:03,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:46:03,699 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-09-17 02:46:03,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:03,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:03,699 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:03,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2020-09-17 02:46:03,900 INFO L427 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:03,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:03,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1062041505, now seen corresponding path program 334 times [2020-09-17 02:46:03,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:03,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657950007] [2020-09-17 02:46:03,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:04,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657950007] [2020-09-17 02:46:04,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512362061] [2020-09-17 02:46:04,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:04,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:46:04,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:04,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:04,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:04,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:46:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:05,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:05,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:46:05,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137436968] [2020-09-17 02:46:05,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:46:05,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:05,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:46:05,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:46:05,038 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 30 states. [2020-09-17 02:46:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:09,245 INFO L93 Difference]: Finished difference Result 114 states and 293 transitions. [2020-09-17 02:46:09,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-17 02:46:09,248 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:46:09,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:09,249 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:46:09,249 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:46:09,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1951, Invalid=4211, Unknown=0, NotChecked=0, Total=6162 [2020-09-17 02:46:09,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:46:09,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 78. [2020-09-17 02:46:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:46:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2020-09-17 02:46:09,251 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 33 [2020-09-17 02:46:09,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:09,252 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2020-09-17 02:46:09,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:46:09,252 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2020-09-17 02:46:09,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:09,252 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:09,252 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:09,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:09,453 INFO L427 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:09,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1801619636, now seen corresponding path program 335 times [2020-09-17 02:46:09,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:09,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440806494] [2020-09-17 02:46:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:10,630 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:10,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440806494] [2020-09-17 02:46:10,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484875618] [2020-09-17 02:46:10,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:10,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-17 02:46:10,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:10,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:10,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:10,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:10,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:46:10,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399961946] [2020-09-17 02:46:10,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:46:10,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:10,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:46:10,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:46:10,732 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand 29 states. [2020-09-17 02:46:12,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:12,499 INFO L93 Difference]: Finished difference Result 120 states and 279 transitions. [2020-09-17 02:46:12,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:46:12,502 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:46:12,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:12,502 INFO L225 Difference]: With dead ends: 120 [2020-09-17 02:46:12,503 INFO L226 Difference]: Without dead ends: 114 [2020-09-17 02:46:12,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=913, Invalid=1949, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:46:12,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-17 02:46:12,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2020-09-17 02:46:12,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:46:12,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 211 transitions. [2020-09-17 02:46:12,505 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 211 transitions. Word has length 33 [2020-09-17 02:46:12,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:12,505 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 211 transitions. [2020-09-17 02:46:12,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:46:12,505 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 211 transitions. [2020-09-17 02:46:12,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:12,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:12,506 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:12,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2020-09-17 02:46:12,707 INFO L427 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:12,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:12,707 INFO L82 PathProgramCache]: Analyzing trace with hash 2064174256, now seen corresponding path program 336 times [2020-09-17 02:46:12,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:12,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538027114] [2020-09-17 02:46:12,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:13,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538027114] [2020-09-17 02:46:13,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941862867] [2020-09-17 02:46:13,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:14,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 02:46:14,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:14,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:14,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:14,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:46:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:14,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:14,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:46:14,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18255533] [2020-09-17 02:46:14,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:46:14,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:14,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:46:14,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:46:14,170 INFO L87 Difference]: Start difference. First operand 86 states and 211 transitions. Second operand 30 states. [2020-09-17 02:46:16,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:16,074 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-09-17 02:46:16,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:46:16,077 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:46:16,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:16,077 INFO L225 Difference]: With dead ends: 146 [2020-09-17 02:46:16,078 INFO L226 Difference]: Without dead ends: 140 [2020-09-17 02:46:16,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=922, Invalid=2158, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:46:16,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-17 02:46:16,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2020-09-17 02:46:16,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 02:46:16,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 207 transitions. [2020-09-17 02:46:16,081 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 207 transitions. Word has length 33 [2020-09-17 02:46:16,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:16,081 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 207 transitions. [2020-09-17 02:46:16,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:46:16,081 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 207 transitions. [2020-09-17 02:46:16,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:16,081 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:16,082 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:16,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:16,282 INFO L427 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:16,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:16,283 INFO L82 PathProgramCache]: Analyzing trace with hash -750635858, now seen corresponding path program 337 times [2020-09-17 02:46:16,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:16,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364694316] [2020-09-17 02:46:16,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:17,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364694316] [2020-09-17 02:46:17,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541681954] [2020-09-17 02:46:17,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:17,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:17,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:17,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:17,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:46:17,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227543416] [2020-09-17 02:46:17,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:46:17,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:17,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:46:17,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:46:17,565 INFO L87 Difference]: Start difference. First operand 84 states and 207 transitions. Second operand 29 states. [2020-09-17 02:46:19,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:19,604 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-09-17 02:46:19,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:46:19,607 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:46:19,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:19,607 INFO L225 Difference]: With dead ends: 147 [2020-09-17 02:46:19,607 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 02:46:19,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=922, Invalid=2270, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:46:19,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 02:46:19,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 87. [2020-09-17 02:46:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:46:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 215 transitions. [2020-09-17 02:46:19,610 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 215 transitions. Word has length 33 [2020-09-17 02:46:19,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:19,610 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 215 transitions. [2020-09-17 02:46:19,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:46:19,610 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 215 transitions. [2020-09-17 02:46:19,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:19,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:19,611 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:19,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2020-09-17 02:46:19,812 INFO L427 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:19,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:19,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1720423186, now seen corresponding path program 338 times [2020-09-17 02:46:19,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:19,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100103073] [2020-09-17 02:46:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:21,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100103073] [2020-09-17 02:46:21,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259608668] [2020-09-17 02:46:21,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:21,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:46:21,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:21,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:21,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:21,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:46:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:21,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:21,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:46:21,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854543327] [2020-09-17 02:46:21,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:46:21,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:21,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:46:21,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:46:21,176 INFO L87 Difference]: Start difference. First operand 87 states and 215 transitions. Second operand 30 states. [2020-09-17 02:46:23,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:23,282 INFO L93 Difference]: Finished difference Result 169 states and 379 transitions. [2020-09-17 02:46:23,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:46:23,286 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:46:23,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:23,286 INFO L225 Difference]: With dead ends: 169 [2020-09-17 02:46:23,286 INFO L226 Difference]: Without dead ends: 163 [2020-09-17 02:46:23,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=964, Invalid=2458, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 02:46:23,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-17 02:46:23,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 86. [2020-09-17 02:46:23,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:46:23,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 213 transitions. [2020-09-17 02:46:23,288 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 213 transitions. Word has length 33 [2020-09-17 02:46:23,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:23,289 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 213 transitions. [2020-09-17 02:46:23,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:46:23,289 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 213 transitions. [2020-09-17 02:46:23,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:23,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:23,289 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:23,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:23,490 INFO L427 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:23,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:23,491 INFO L82 PathProgramCache]: Analyzing trace with hash 895148688, now seen corresponding path program 339 times [2020-09-17 02:46:23,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:23,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369141427] [2020-09-17 02:46:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:24,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369141427] [2020-09-17 02:46:24,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369631266] [2020-09-17 02:46:24,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:24,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-17 02:46:24,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:24,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:24,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:24,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:24,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:46:24,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294493652] [2020-09-17 02:46:24,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:46:24,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:24,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:46:24,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:46:24,737 INFO L87 Difference]: Start difference. First operand 86 states and 213 transitions. Second operand 29 states. [2020-09-17 02:46:26,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:26,944 INFO L93 Difference]: Finished difference Result 169 states and 381 transitions. [2020-09-17 02:46:26,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:46:26,947 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:46:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:26,948 INFO L225 Difference]: With dead ends: 169 [2020-09-17 02:46:26,948 INFO L226 Difference]: Without dead ends: 163 [2020-09-17 02:46:26,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=978, Invalid=2562, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:46:26,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-17 02:46:26,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 89. [2020-09-17 02:46:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-17 02:46:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 221 transitions. [2020-09-17 02:46:26,951 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 221 transitions. Word has length 33 [2020-09-17 02:46:26,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:26,952 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 221 transitions. [2020-09-17 02:46:26,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:46:26,952 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 221 transitions. [2020-09-17 02:46:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:26,952 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:26,952 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:27,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:27,153 INFO L427 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:27,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:27,154 INFO L82 PathProgramCache]: Analyzing trace with hash -143619596, now seen corresponding path program 340 times [2020-09-17 02:46:27,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:27,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744500272] [2020-09-17 02:46:27,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:28,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744500272] [2020-09-17 02:46:28,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030426182] [2020-09-17 02:46:28,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:28,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:46:28,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:28,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:28,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:28,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:46:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:28,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:28,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:46:28,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546752973] [2020-09-17 02:46:28,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:46:28,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:28,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:46:28,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:46:28,466 INFO L87 Difference]: Start difference. First operand 89 states and 221 transitions. Second operand 30 states. [2020-09-17 02:46:30,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:30,854 INFO L93 Difference]: Finished difference Result 166 states and 375 transitions. [2020-09-17 02:46:30,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:46:30,857 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:46:30,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:30,858 INFO L225 Difference]: With dead ends: 166 [2020-09-17 02:46:30,858 INFO L226 Difference]: Without dead ends: 160 [2020-09-17 02:46:30,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=979, Invalid=2681, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:46:30,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-17 02:46:30,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 88. [2020-09-17 02:46:30,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:46:30,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 219 transitions. [2020-09-17 02:46:30,860 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 219 transitions. Word has length 33 [2020-09-17 02:46:30,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:30,860 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 219 transitions. [2020-09-17 02:46:30,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:46:30,861 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 219 transitions. [2020-09-17 02:46:30,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:30,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:30,861 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:31,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2020-09-17 02:46:31,062 INFO L427 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:31,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:31,062 INFO L82 PathProgramCache]: Analyzing trace with hash 271163634, now seen corresponding path program 341 times [2020-09-17 02:46:31,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:31,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135460213] [2020-09-17 02:46:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:32,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135460213] [2020-09-17 02:46:32,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120991844] [2020-09-17 02:46:32,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:32,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-17 02:46:32,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:32,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:32,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:32,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:32,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:46:32,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968967647] [2020-09-17 02:46:32,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:46:32,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:32,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:46:32,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:46:32,356 INFO L87 Difference]: Start difference. First operand 88 states and 219 transitions. Second operand 29 states. [2020-09-17 02:46:34,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:34,746 INFO L93 Difference]: Finished difference Result 167 states and 379 transitions. [2020-09-17 02:46:34,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:46:34,749 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:46:34,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:34,749 INFO L225 Difference]: With dead ends: 167 [2020-09-17 02:46:34,750 INFO L226 Difference]: Without dead ends: 161 [2020-09-17 02:46:34,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1008, Invalid=2774, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 02:46:34,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-17 02:46:34,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 91. [2020-09-17 02:46:34,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 02:46:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 227 transitions. [2020-09-17 02:46:34,752 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 227 transitions. Word has length 33 [2020-09-17 02:46:34,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:34,752 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 227 transitions. [2020-09-17 02:46:34,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:46:34,753 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 227 transitions. [2020-09-17 02:46:34,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:34,753 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:34,753 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:34,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2020-09-17 02:46:34,954 INFO L427 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:34,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:34,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1450585770, now seen corresponding path program 342 times [2020-09-17 02:46:34,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:34,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579322110] [2020-09-17 02:46:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:36,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579322110] [2020-09-17 02:46:36,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053803931] [2020-09-17 02:46:36,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:36,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 02:46:36,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:36,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:36,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:36,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:46:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:36,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:36,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:46:36,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900729162] [2020-09-17 02:46:36,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:46:36,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:36,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:46:36,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:46:36,257 INFO L87 Difference]: Start difference. First operand 91 states and 227 transitions. Second operand 30 states. [2020-09-17 02:46:38,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:38,884 INFO L93 Difference]: Finished difference Result 164 states and 373 transitions. [2020-09-17 02:46:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:46:38,886 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:46:38,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:38,887 INFO L225 Difference]: With dead ends: 164 [2020-09-17 02:46:38,887 INFO L226 Difference]: Without dead ends: 158 [2020-09-17 02:46:38,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1010, Invalid=2896, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:46:38,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-09-17 02:46:38,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2020-09-17 02:46:38,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 02:46:38,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 225 transitions. [2020-09-17 02:46:38,895 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 225 transitions. Word has length 33 [2020-09-17 02:46:38,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:38,896 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 225 transitions. [2020-09-17 02:46:38,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:46:38,896 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 225 transitions. [2020-09-17 02:46:38,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:38,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:38,896 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:39,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2020-09-17 02:46:39,097 INFO L427 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:39,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:39,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1660456916, now seen corresponding path program 343 times [2020-09-17 02:46:39,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:39,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946627735] [2020-09-17 02:46:39,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:40,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946627735] [2020-09-17 02:46:40,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941156111] [2020-09-17 02:46:40,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:40,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:40,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:40,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:40,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:46:40,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881003443] [2020-09-17 02:46:40,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:46:40,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:40,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:46:40,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:46:40,283 INFO L87 Difference]: Start difference. First operand 90 states and 225 transitions. Second operand 29 states. [2020-09-17 02:46:42,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:42,824 INFO L93 Difference]: Finished difference Result 165 states and 377 transitions. [2020-09-17 02:46:42,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:46:42,827 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:46:42,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:42,827 INFO L225 Difference]: With dead ends: 165 [2020-09-17 02:46:42,828 INFO L226 Difference]: Without dead ends: 159 [2020-09-17 02:46:42,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1054, Invalid=2978, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 02:46:42,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-17 02:46:42,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 93. [2020-09-17 02:46:42,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:46:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-09-17 02:46:42,830 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 33 [2020-09-17 02:46:42,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:42,830 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-09-17 02:46:42,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:46:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-09-17 02:46:42,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:42,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:42,831 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:43,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2020-09-17 02:46:43,032 INFO L427 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:43,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:43,033 INFO L82 PathProgramCache]: Analyzing trace with hash 112298296, now seen corresponding path program 344 times [2020-09-17 02:46:43,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:43,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094539241] [2020-09-17 02:46:43,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:44,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094539241] [2020-09-17 02:46:44,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964048651] [2020-09-17 02:46:44,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:44,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:46:44,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:44,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:44,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:44,278 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:46:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:44,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:44,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:46:44,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514624115] [2020-09-17 02:46:44,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:46:44,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:44,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:46:44,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:46:44,311 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 30 states. [2020-09-17 02:46:47,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:47,192 INFO L93 Difference]: Finished difference Result 162 states and 371 transitions. [2020-09-17 02:46:47,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:46:47,195 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:46:47,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:47,196 INFO L225 Difference]: With dead ends: 162 [2020-09-17 02:46:47,196 INFO L226 Difference]: Without dead ends: 156 [2020-09-17 02:46:47,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1057, Invalid=3103, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 02:46:47,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-09-17 02:46:47,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 92. [2020-09-17 02:46:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:46:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 231 transitions. [2020-09-17 02:46:47,199 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 231 transitions. Word has length 33 [2020-09-17 02:46:47,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:47,199 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 231 transitions. [2020-09-17 02:46:47,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:46:47,199 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 231 transitions. [2020-09-17 02:46:47,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:47,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:47,200 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:47,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2020-09-17 02:46:47,401 INFO L427 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:47,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:47,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1189490890, now seen corresponding path program 345 times [2020-09-17 02:46:47,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:47,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594229289] [2020-09-17 02:46:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:48,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594229289] [2020-09-17 02:46:48,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060294141] [2020-09-17 02:46:48,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:48,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-17 02:46:48,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:48,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:48,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:48,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:48,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:46:48,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837499994] [2020-09-17 02:46:48,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:46:48,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:48,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:46:48,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:46:48,569 INFO L87 Difference]: Start difference. First operand 92 states and 231 transitions. Second operand 29 states. [2020-09-17 02:46:51,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:51,359 INFO L93 Difference]: Finished difference Result 163 states and 375 transitions. [2020-09-17 02:46:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-17 02:46:51,362 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:46:51,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:51,362 INFO L225 Difference]: With dead ends: 163 [2020-09-17 02:46:51,362 INFO L226 Difference]: Without dead ends: 157 [2020-09-17 02:46:51,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1116, Invalid=3174, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 02:46:51,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-17 02:46:51,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-09-17 02:46:51,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-17 02:46:51,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 239 transitions. [2020-09-17 02:46:51,365 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 239 transitions. Word has length 33 [2020-09-17 02:46:51,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:51,365 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 239 transitions. [2020-09-17 02:46:51,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:46:51,366 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 239 transitions. [2020-09-17 02:46:51,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:51,366 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:51,366 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:51,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2020-09-17 02:46:51,567 INFO L427 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:51,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:51,567 INFO L82 PathProgramCache]: Analyzing trace with hash -2000039526, now seen corresponding path program 346 times [2020-09-17 02:46:51,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:51,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167788589] [2020-09-17 02:46:51,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:52,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167788589] [2020-09-17 02:46:52,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518747665] [2020-09-17 02:46:52,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:52,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:46:52,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:52,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:52,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:52,777 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:46:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:52,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:52,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:46:52,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797033418] [2020-09-17 02:46:52,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:46:52,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:52,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:46:52,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:46:52,817 INFO L87 Difference]: Start difference. First operand 95 states and 239 transitions. Second operand 30 states. [2020-09-17 02:46:55,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:55,956 INFO L93 Difference]: Finished difference Result 160 states and 369 transitions. [2020-09-17 02:46:55,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:46:55,959 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:46:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:55,959 INFO L225 Difference]: With dead ends: 160 [2020-09-17 02:46:55,959 INFO L226 Difference]: Without dead ends: 154 [2020-09-17 02:46:55,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1120, Invalid=3302, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 02:46:55,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-17 02:46:55,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 94. [2020-09-17 02:46:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 02:46:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 237 transitions. [2020-09-17 02:46:55,962 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 237 transitions. Word has length 33 [2020-09-17 02:46:55,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:55,963 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 237 transitions. [2020-09-17 02:46:55,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:46:55,963 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 237 transitions. [2020-09-17 02:46:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:55,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:55,963 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:56,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:56,164 INFO L427 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:56,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:56,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1947762920, now seen corresponding path program 347 times [2020-09-17 02:46:56,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:56,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445293220] [2020-09-17 02:46:56,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:57,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445293220] [2020-09-17 02:46:57,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795408847] [2020-09-17 02:46:57,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:57,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-17 02:46:57,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:57,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:57,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:57,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:57,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:46:57,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215771803] [2020-09-17 02:46:57,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:46:57,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:57,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:46:57,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:46:57,410 INFO L87 Difference]: Start difference. First operand 94 states and 237 transitions. Second operand 29 states. [2020-09-17 02:47:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:00,363 INFO L93 Difference]: Finished difference Result 161 states and 373 transitions. [2020-09-17 02:47:00,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:47:00,366 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:47:00,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:00,367 INFO L225 Difference]: With dead ends: 161 [2020-09-17 02:47:00,367 INFO L226 Difference]: Without dead ends: 155 [2020-09-17 02:47:00,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 02:47:00,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-17 02:47:00,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 97. [2020-09-17 02:47:00,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-17 02:47:00,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 245 transitions. [2020-09-17 02:47:00,370 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 245 transitions. Word has length 33 [2020-09-17 02:47:00,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:00,370 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 245 transitions. [2020-09-17 02:47:00,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:47:00,371 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 245 transitions. [2020-09-17 02:47:00,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:00,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:00,371 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:00,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2020-09-17 02:47:00,580 INFO L427 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:00,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:00,581 INFO L82 PathProgramCache]: Analyzing trace with hash -71513476, now seen corresponding path program 348 times [2020-09-17 02:47:00,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:00,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811562203] [2020-09-17 02:47:00,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:01,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811562203] [2020-09-17 02:47:01,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263533659] [2020-09-17 02:47:01,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:01,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 02:47:01,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:01,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:01,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:01,779 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:47:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:01,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:01,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:47:01,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992970091] [2020-09-17 02:47:01,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:47:01,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:01,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:47:01,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:47:01,815 INFO L87 Difference]: Start difference. First operand 97 states and 245 transitions. Second operand 30 states. [2020-09-17 02:47:05,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:05,164 INFO L93 Difference]: Finished difference Result 158 states and 367 transitions. [2020-09-17 02:47:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:47:05,167 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:47:05,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:05,168 INFO L225 Difference]: With dead ends: 158 [2020-09-17 02:47:05,168 INFO L226 Difference]: Without dead ends: 152 [2020-09-17 02:47:05,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1199, Invalid=3493, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 02:47:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-17 02:47:05,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 96. [2020-09-17 02:47:05,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-17 02:47:05,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 243 transitions. [2020-09-17 02:47:05,171 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 243 transitions. Word has length 33 [2020-09-17 02:47:05,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:05,171 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 243 transitions. [2020-09-17 02:47:05,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:47:05,171 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 243 transitions. [2020-09-17 02:47:05,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:05,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:05,172 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:05,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2020-09-17 02:47:05,373 INFO L427 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:05,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:05,373 INFO L82 PathProgramCache]: Analyzing trace with hash 616808314, now seen corresponding path program 349 times [2020-09-17 02:47:05,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:05,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135887839] [2020-09-17 02:47:05,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:06,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135887839] [2020-09-17 02:47:06,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427699966] [2020-09-17 02:47:06,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:06,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:06,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:06,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:06,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:47:06,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538820036] [2020-09-17 02:47:06,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:47:06,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:06,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:47:06,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:47:06,504 INFO L87 Difference]: Start difference. First operand 96 states and 243 transitions. Second operand 29 states. [2020-09-17 02:47:09,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:09,705 INFO L93 Difference]: Finished difference Result 159 states and 371 transitions. [2020-09-17 02:47:09,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-17 02:47:09,708 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:47:09,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:09,709 INFO L225 Difference]: With dead ends: 159 [2020-09-17 02:47:09,709 INFO L226 Difference]: Without dead ends: 153 [2020-09-17 02:47:09,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1288, Invalid=3542, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 02:47:09,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-17 02:47:09,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 99. [2020-09-17 02:47:09,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:47:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 251 transitions. [2020-09-17 02:47:09,712 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 251 transitions. Word has length 33 [2020-09-17 02:47:09,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:09,712 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 251 transitions. [2020-09-17 02:47:09,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:47:09,713 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 251 transitions. [2020-09-17 02:47:09,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:09,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:09,713 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:09,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:09,914 INFO L427 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:09,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:09,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1601999838, now seen corresponding path program 350 times [2020-09-17 02:47:09,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:09,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044428756] [2020-09-17 02:47:09,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:10,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044428756] [2020-09-17 02:47:10,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086937409] [2020-09-17 02:47:10,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:11,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:47:11,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:11,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:11,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:11,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:47:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:11,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:11,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:47:11,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438673375] [2020-09-17 02:47:11,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:47:11,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:11,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:47:11,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:47:11,128 INFO L87 Difference]: Start difference. First operand 99 states and 251 transitions. Second operand 30 states. [2020-09-17 02:47:14,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:14,884 INFO L93 Difference]: Finished difference Result 156 states and 365 transitions. [2020-09-17 02:47:14,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 02:47:14,887 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:47:14,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:14,888 INFO L225 Difference]: With dead ends: 156 [2020-09-17 02:47:14,888 INFO L226 Difference]: Without dead ends: 150 [2020-09-17 02:47:14,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1294, Invalid=3676, Unknown=0, NotChecked=0, Total=4970 [2020-09-17 02:47:14,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-17 02:47:14,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 98. [2020-09-17 02:47:14,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:47:14,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 249 transitions. [2020-09-17 02:47:14,891 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 249 transitions. Word has length 33 [2020-09-17 02:47:14,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:14,892 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 249 transitions. [2020-09-17 02:47:14,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:47:14,892 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 249 transitions. [2020-09-17 02:47:14,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:14,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:14,892 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:15,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:15,093 INFO L427 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:15,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:15,094 INFO L82 PathProgramCache]: Analyzing trace with hash -15159204, now seen corresponding path program 351 times [2020-09-17 02:47:15,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:15,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162049875] [2020-09-17 02:47:15,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:16,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162049875] [2020-09-17 02:47:16,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120364410] [2020-09-17 02:47:16,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:16,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-17 02:47:16,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:16,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:16,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:16,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:16,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:47:16,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763442029] [2020-09-17 02:47:16,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:47:16,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:16,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:47:16,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:47:16,257 INFO L87 Difference]: Start difference. First operand 98 states and 249 transitions. Second operand 29 states. [2020-09-17 02:47:19,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:19,606 INFO L93 Difference]: Finished difference Result 157 states and 369 transitions. [2020-09-17 02:47:19,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-17 02:47:19,609 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:47:19,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:19,609 INFO L225 Difference]: With dead ends: 157 [2020-09-17 02:47:19,610 INFO L226 Difference]: Without dead ends: 151 [2020-09-17 02:47:19,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1398, Invalid=3714, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 02:47:19,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-17 02:47:19,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 101. [2020-09-17 02:47:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-17 02:47:19,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 257 transitions. [2020-09-17 02:47:19,612 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 257 transitions. Word has length 33 [2020-09-17 02:47:19,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:19,612 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 257 transitions. [2020-09-17 02:47:19,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:47:19,612 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 257 transitions. [2020-09-17 02:47:19,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:19,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:19,613 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:19,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:19,814 INFO L427 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:19,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:19,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1241730496, now seen corresponding path program 352 times [2020-09-17 02:47:19,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:19,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054706699] [2020-09-17 02:47:19,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:20,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054706699] [2020-09-17 02:47:20,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159343165] [2020-09-17 02:47:20,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:20,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:47:20,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:20,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:20,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:20,970 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:47:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:21,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:21,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:47:21,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548575090] [2020-09-17 02:47:21,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:47:21,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:21,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:47:21,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:47:21,012 INFO L87 Difference]: Start difference. First operand 101 states and 257 transitions. Second operand 30 states. [2020-09-17 02:47:24,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:24,916 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-09-17 02:47:24,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 02:47:24,920 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:47:24,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:24,921 INFO L225 Difference]: With dead ends: 154 [2020-09-17 02:47:24,921 INFO L226 Difference]: Without dead ends: 148 [2020-09-17 02:47:24,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1405, Invalid=3851, Unknown=0, NotChecked=0, Total=5256 [2020-09-17 02:47:24,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-17 02:47:24,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 100. [2020-09-17 02:47:24,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 02:47:24,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 255 transitions. [2020-09-17 02:47:24,924 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 255 transitions. Word has length 33 [2020-09-17 02:47:24,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:24,925 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 255 transitions. [2020-09-17 02:47:24,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:47:24,925 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 255 transitions. [2020-09-17 02:47:24,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:24,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:24,925 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:25,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2020-09-17 02:47:25,126 INFO L427 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:25,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:25,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1437044290, now seen corresponding path program 353 times [2020-09-17 02:47:25,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:25,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060106762] [2020-09-17 02:47:25,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:26,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060106762] [2020-09-17 02:47:26,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519447116] [2020-09-17 02:47:26,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:26,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-17 02:47:26,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:26,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:26,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:26,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:26,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:47:26,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583249930] [2020-09-17 02:47:26,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:47:26,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:26,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:47:26,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:47:26,272 INFO L87 Difference]: Start difference. First operand 100 states and 255 transitions. Second operand 29 states. [2020-09-17 02:47:29,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:29,858 INFO L93 Difference]: Finished difference Result 155 states and 367 transitions. [2020-09-17 02:47:29,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-17 02:47:29,861 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:47:29,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:29,861 INFO L225 Difference]: With dead ends: 155 [2020-09-17 02:47:29,861 INFO L226 Difference]: Without dead ends: 149 [2020-09-17 02:47:29,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1524, Invalid=3878, Unknown=0, NotChecked=0, Total=5402 [2020-09-17 02:47:29,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-17 02:47:29,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2020-09-17 02:47:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-17 02:47:29,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 263 transitions. [2020-09-17 02:47:29,864 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 263 transitions. Word has length 33 [2020-09-17 02:47:29,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:29,864 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 263 transitions. [2020-09-17 02:47:29,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:47:29,864 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 263 transitions. [2020-09-17 02:47:29,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:29,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:29,864 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:30,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2020-09-17 02:47:30,065 INFO L427 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:30,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:30,066 INFO L82 PathProgramCache]: Analyzing trace with hash -917301214, now seen corresponding path program 354 times [2020-09-17 02:47:30,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:30,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811806298] [2020-09-17 02:47:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:31,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811806298] [2020-09-17 02:47:31,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500268702] [2020-09-17 02:47:31,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:31,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 02:47:31,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:31,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:31,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:31,231 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:47:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:31,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:31,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:47:31,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714614483] [2020-09-17 02:47:31,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:47:31,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:31,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:47:31,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:47:31,284 INFO L87 Difference]: Start difference. First operand 103 states and 263 transitions. Second operand 30 states. [2020-09-17 02:47:35,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:35,531 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-09-17 02:47:35,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 02:47:35,534 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:47:35,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:35,535 INFO L225 Difference]: With dead ends: 152 [2020-09-17 02:47:35,535 INFO L226 Difference]: Without dead ends: 146 [2020-09-17 02:47:35,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1532, Invalid=4018, Unknown=0, NotChecked=0, Total=5550 [2020-09-17 02:47:35,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-17 02:47:35,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 102. [2020-09-17 02:47:35,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-17 02:47:35,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 261 transitions. [2020-09-17 02:47:35,538 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 261 transitions. Word has length 33 [2020-09-17 02:47:35,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:35,538 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 261 transitions. [2020-09-17 02:47:35,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:47:35,539 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 261 transitions. [2020-09-17 02:47:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:35,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:35,539 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:35,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:35,740 INFO L427 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:35,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:35,740 INFO L82 PathProgramCache]: Analyzing trace with hash 738010016, now seen corresponding path program 355 times [2020-09-17 02:47:35,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:35,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865394950] [2020-09-17 02:47:35,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:36,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865394950] [2020-09-17 02:47:36,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393439883] [2020-09-17 02:47:36,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:36,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:36,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:36,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:36,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:36,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:47:36,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558504718] [2020-09-17 02:47:36,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:47:36,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:36,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:47:36,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:47:36,921 INFO L87 Difference]: Start difference. First operand 102 states and 261 transitions. Second operand 29 states. [2020-09-17 02:47:40,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:40,727 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-09-17 02:47:40,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-17 02:47:40,730 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:47:40,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:40,731 INFO L225 Difference]: With dead ends: 153 [2020-09-17 02:47:40,731 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 02:47:40,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1666, Invalid=4034, Unknown=0, NotChecked=0, Total=5700 [2020-09-17 02:47:40,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 02:47:40,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 105. [2020-09-17 02:47:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:47:40,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:47:40,734 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 33 [2020-09-17 02:47:40,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:40,734 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:47:40,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:47:40,735 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:47:40,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:40,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:40,735 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:40,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2020-09-17 02:47:40,936 INFO L427 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:40,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:40,936 INFO L82 PathProgramCache]: Analyzing trace with hash -982117628, now seen corresponding path program 356 times [2020-09-17 02:47:40,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:40,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448890483] [2020-09-17 02:47:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:41,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448890483] [2020-09-17 02:47:41,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885167868] [2020-09-17 02:47:41,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:42,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:47:42,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:42,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:42,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:42,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:47:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:42,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:42,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:47:42,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906158547] [2020-09-17 02:47:42,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:47:42,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:42,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:47:42,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:47:42,144 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 30 states. [2020-09-17 02:47:46,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:46,654 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-09-17 02:47:46,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 02:47:46,657 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:47:46,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:46,658 INFO L225 Difference]: With dead ends: 150 [2020-09-17 02:47:46,658 INFO L226 Difference]: Without dead ends: 144 [2020-09-17 02:47:46,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1675, Invalid=4177, Unknown=0, NotChecked=0, Total=5852 [2020-09-17 02:47:46,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-17 02:47:46,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 104. [2020-09-17 02:47:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:47:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:47:46,662 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 33 [2020-09-17 02:47:46,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:46,662 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:47:46,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:47:46,662 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:47:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:46,662 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:46,662 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:46,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:46,863 INFO L427 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:46,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:46,864 INFO L82 PathProgramCache]: Analyzing trace with hash -511121918, now seen corresponding path program 357 times [2020-09-17 02:47:46,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:46,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017692348] [2020-09-17 02:47:46,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:47,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017692348] [2020-09-17 02:47:47,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319499510] [2020-09-17 02:47:47,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:47,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-17 02:47:47,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:47,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:47,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:48,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:48,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:47:48,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86098240] [2020-09-17 02:47:48,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:47:48,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:48,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:47:48,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:47:48,042 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 29 states. [2020-09-17 02:47:52,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:52,060 INFO L93 Difference]: Finished difference Result 151 states and 363 transitions. [2020-09-17 02:47:52,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-09-17 02:47:52,064 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:47:52,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:52,064 INFO L225 Difference]: With dead ends: 151 [2020-09-17 02:47:52,064 INFO L226 Difference]: Without dead ends: 145 [2020-09-17 02:47:52,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1824, Invalid=4182, Unknown=0, NotChecked=0, Total=6006 [2020-09-17 02:47:52,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-17 02:47:52,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 107. [2020-09-17 02:47:52,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-17 02:47:52,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 275 transitions. [2020-09-17 02:47:52,067 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 275 transitions. Word has length 33 [2020-09-17 02:47:52,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:52,067 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 275 transitions. [2020-09-17 02:47:52,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:47:52,067 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 275 transitions. [2020-09-17 02:47:52,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:52,068 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:52,068 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:52,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2020-09-17 02:47:52,269 INFO L427 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:52,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:52,269 INFO L82 PathProgramCache]: Analyzing trace with hash -495034778, now seen corresponding path program 358 times [2020-09-17 02:47:52,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:52,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740207071] [2020-09-17 02:47:52,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:53,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740207071] [2020-09-17 02:47:53,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444989907] [2020-09-17 02:47:53,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:53,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:47:53,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:53,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:53,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:53,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:47:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:53,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:53,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:47:53,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717208088] [2020-09-17 02:47:53,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:47:53,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:53,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:47:53,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:47:53,497 INFO L87 Difference]: Start difference. First operand 107 states and 275 transitions. Second operand 30 states. [2020-09-17 02:47:58,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:58,286 INFO L93 Difference]: Finished difference Result 148 states and 357 transitions. [2020-09-17 02:47:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-17 02:47:58,289 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:47:58,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:58,290 INFO L225 Difference]: With dead ends: 148 [2020-09-17 02:47:58,290 INFO L226 Difference]: Without dead ends: 142 [2020-09-17 02:47:58,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1834, Invalid=4328, Unknown=0, NotChecked=0, Total=6162 [2020-09-17 02:47:58,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-17 02:47:58,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 106. [2020-09-17 02:47:58,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-17 02:47:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-09-17 02:47:58,293 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 33 [2020-09-17 02:47:58,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:58,293 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-09-17 02:47:58,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:47:58,294 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-09-17 02:47:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:58,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:58,294 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:58,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:58,495 INFO L427 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:58,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:58,495 INFO L82 PathProgramCache]: Analyzing trace with hash -494544668, now seen corresponding path program 359 times [2020-09-17 02:47:58,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:58,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036741741] [2020-09-17 02:47:58,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:59,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036741741] [2020-09-17 02:47:59,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146647913] [2020-09-17 02:47:59,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:59,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-17 02:47:59,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:59,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:59,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:59,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:59,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:47:59,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756552751] [2020-09-17 02:47:59,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:47:59,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:59,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:47:59,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:47:59,689 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 29 states. [2020-09-17 02:48:03,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:48:03,768 INFO L93 Difference]: Finished difference Result 168 states and 407 transitions. [2020-09-17 02:48:03,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-09-17 02:48:03,771 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:48:03,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:48:03,772 INFO L225 Difference]: With dead ends: 168 [2020-09-17 02:48:03,772 INFO L226 Difference]: Without dead ends: 162 [2020-09-17 02:48:03,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1998, Invalid=4322, Unknown=0, NotChecked=0, Total=6320 [2020-09-17 02:48:03,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-17 02:48:03,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 112. [2020-09-17 02:48:03,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-17 02:48:03,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 293 transitions. [2020-09-17 02:48:03,775 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 293 transitions. Word has length 33 [2020-09-17 02:48:03,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:48:03,775 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 293 transitions. [2020-09-17 02:48:03,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:48:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 293 transitions. [2020-09-17 02:48:03,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:48:03,776 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:48:03,776 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:48:03,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:48:03,977 INFO L427 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:48:03,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:48:03,977 INFO L82 PathProgramCache]: Analyzing trace with hash -494527928, now seen corresponding path program 360 times [2020-09-17 02:48:03,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:48:03,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378645466] [2020-09-17 02:48:03,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:48:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:48:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:05,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378645466] [2020-09-17 02:48:05,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000368421] [2020-09-17 02:48:05,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:48:05,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 02:48:05,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:48:05,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:48:05,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:48:05,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:48:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:05,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:48:05,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:48:05,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981360976] [2020-09-17 02:48:05,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:48:05,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:48:05,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:48:05,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:48:05,229 INFO L87 Difference]: Start difference. First operand 112 states and 293 transitions. Second operand 30 states. [2020-09-17 02:48:10,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:48:10,082 INFO L93 Difference]: Finished difference Result 149 states and 363 transitions. [2020-09-17 02:48:10,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-17 02:48:10,086 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:48:10,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:48:10,086 INFO L225 Difference]: With dead ends: 149 [2020-09-17 02:48:10,087 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 02:48:10,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2009, Invalid=4471, Unknown=0, NotChecked=0, Total=6480 [2020-09-17 02:48:10,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 02:48:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 109. [2020-09-17 02:48:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-17 02:48:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-09-17 02:48:10,089 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-09-17 02:48:10,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:48:10,089 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-09-17 02:48:10,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:48:10,090 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-09-17 02:48:10,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 02:48:10,090 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:48:10,090 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:48:10,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:48:10,291 INFO L427 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:48:10,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:48:10,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1551441143, now seen corresponding path program 361 times [2020-09-17 02:48:10,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:48:10,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186808742] [2020-09-17 02:48:10,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:48:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:48:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:11,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186808742] [2020-09-17 02:48:11,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054609449] [2020-09-17 02:48:11,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:48:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:48:11,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 02:48:11,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:48:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:11,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:48:11,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 02:48:11,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692312077] [2020-09-17 02:48:11,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:48:11,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:48:11,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:48:11,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:48:11,809 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 30 states. [2020-09-17 02:48:14,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:48:14,047 INFO L93 Difference]: Finished difference Result 174 states and 411 transitions. [2020-09-17 02:48:14,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:48:14,050 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-09-17 02:48:14,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:48:14,050 INFO L225 Difference]: With dead ends: 174 [2020-09-17 02:48:14,051 INFO L226 Difference]: Without dead ends: 168 [2020-09-17 02:48:14,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=975, Invalid=2217, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:48:14,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-17 02:48:14,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 111. [2020-09-17 02:48:14,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-17 02:48:14,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-09-17 02:48:14,054 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-09-17 02:48:14,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:48:14,054 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-09-17 02:48:14,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:48:14,054 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-09-17 02:48:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 02:48:14,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:48:14,055 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:48:14,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2020-09-17 02:48:14,255 INFO L427 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:48:14,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:48:14,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1122267739, now seen corresponding path program 362 times [2020-09-17 02:48:14,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:48:14,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525862712] [2020-09-17 02:48:14,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:48:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:48:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:15,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525862712] [2020-09-17 02:48:15,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309459908] [2020-09-17 02:48:15,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:48:15,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:48:15,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:48:15,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 02:48:15,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:48:15,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:48:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:15,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:48:15,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-09-17 02:48:15,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070662333] [2020-09-17 02:48:15,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 02:48:15,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:48:15,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 02:48:15,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:48:15,861 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-09-17 02:48:18,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:48:18,340 INFO L93 Difference]: Finished difference Result 171 states and 405 transitions. [2020-09-17 02:48:18,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:48:18,343 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 02:48:18,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:48:18,344 INFO L225 Difference]: With dead ends: 171 [2020-09-17 02:48:18,344 INFO L226 Difference]: Without dead ends: 165 [2020-09-17 02:48:18,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1034, Invalid=2506, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:48:18,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-17 02:48:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 110. [2020-09-17 02:48:18,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-17 02:48:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-09-17 02:48:18,347 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-09-17 02:48:18,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:48:18,348 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-09-17 02:48:18,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 02:48:18,348 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-09-17 02:48:18,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 02:48:18,348 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:48:18,348 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:48:18,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:48:18,549 INFO L427 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:48:18,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:48:18,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1692542375, now seen corresponding path program 363 times [2020-09-17 02:48:18,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:48:18,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902656120] [2020-09-17 02:48:18,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:48:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:48:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:19,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902656120] [2020-09-17 02:48:19,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856292620] [2020-09-17 02:48:19,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:48:20,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-17 02:48:20,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:48:20,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 02:48:20,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:48:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:20,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:48:20,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 02:48:20,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951298919] [2020-09-17 02:48:20,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:48:20,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:48:20,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:48:20,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:48:20,033 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-09-17 02:48:22,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:48:22,456 INFO L93 Difference]: Finished difference Result 168 states and 399 transitions. [2020-09-17 02:48:22,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:48:22,459 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-09-17 02:48:22,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:48:22,460 INFO L225 Difference]: With dead ends: 168 [2020-09-17 02:48:22,460 INFO L226 Difference]: Without dead ends: 162 [2020-09-17 02:48:22,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 02:48:22,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-17 02:48:22,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 111. [2020-09-17 02:48:22,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-17 02:48:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-09-17 02:48:22,463 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-09-17 02:48:22,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:48:22,463 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-09-17 02:48:22,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:48:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-09-17 02:48:22,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 02:48:22,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:48:22,464 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:48:22,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2020-09-17 02:48:22,665 INFO L427 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:48:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:48:22,665 INFO L82 PathProgramCache]: Analyzing trace with hash 778516669, now seen corresponding path program 364 times [2020-09-17 02:48:22,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:48:22,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892716183] [2020-09-17 02:48:22,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:48:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:48:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:24,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892716183] [2020-09-17 02:48:24,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987968565] [2020-09-17 02:48:24,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:48:24,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:48:24,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:48:24,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 02:48:24,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:48:24,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:48:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:24,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:48:24,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-09-17 02:48:24,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142705444] [2020-09-17 02:48:24,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 02:48:24,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:48:24,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 02:48:24,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:48:24,226 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-09-17 02:48:26,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:48:26,950 INFO L93 Difference]: Finished difference Result 167 states and 397 transitions. [2020-09-17 02:48:26,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:48:26,953 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 02:48:26,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:48:26,953 INFO L225 Difference]: With dead ends: 167 [2020-09-17 02:48:26,954 INFO L226 Difference]: Without dead ends: 161 [2020-09-17 02:48:26,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1040, Invalid=2742, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 02:48:26,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-17 02:48:26,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2020-09-17 02:48:26,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-17 02:48:26,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-09-17 02:48:26,957 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-09-17 02:48:26,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:48:26,957 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-09-17 02:48:26,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 02:48:26,957 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-09-17 02:48:26,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 02:48:26,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:48:26,958 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:48:27,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:48:27,159 INFO L427 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:48:27,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:48:27,159 INFO L82 PathProgramCache]: Analyzing trace with hash -46757829, now seen corresponding path program 365 times [2020-09-17 02:48:27,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:48:27,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059501893] [2020-09-17 02:48:27,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:48:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat