/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-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-21 22:38:47,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-21 22:38:47,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-21 22:38:47,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-21 22:38:47,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-21 22:38:47,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-21 22:38:47,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-21 22:38:47,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-21 22:38:47,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-21 22:38:47,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-21 22:38:47,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-21 22:38:47,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-21 22:38:47,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-21 22:38:47,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-21 22:38:47,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-21 22:38:47,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-21 22:38:47,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-21 22:38:47,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-21 22:38:47,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-21 22:38:47,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-21 22:38:47,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-21 22:38:47,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-21 22:38:47,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-21 22:38:47,683 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-21 22:38:47,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-21 22:38:47,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-21 22:38:47,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-21 22:38:47,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-21 22:38:47,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-21 22:38:47,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-21 22:38:47,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-21 22:38:47,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-21 22:38:47,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-21 22:38:47,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-21 22:38:47,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-21 22:38:47,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-21 22:38:47,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-21 22:38:47,694 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-21 22:38:47,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-21 22:38:47,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-21 22:38:47,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-21 22:38:47,696 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 [2020-10-21 22:38:47,721 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-21 22:38:47,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-21 22:38:47,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-21 22:38:47,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-21 22:38:47,728 INFO L138 SettingsManager]: * Use SBE=true [2020-10-21 22:38:47,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-21 22:38:47,728 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-21 22:38:47,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-21 22:38:47,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-21 22:38:47,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-21 22:38:47,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-21 22:38:47,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-21 22:38:47,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-21 22:38:47,729 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-21 22:38:47,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-21 22:38:47,730 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-21 22:38:47,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-21 22:38:47,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-21 22:38:47,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-21 22:38:47,732 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-21 22:38:47,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-21 22:38:47,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 22:38:47,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-21 22:38:47,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-21 22:38:47,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-21 22:38:47,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-21 22:38:47,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-21 22:38:47,733 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-21 22:38:47,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-21 22:38:48,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-21 22:38:48,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-21 22:38:48,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-21 22:38:48,116 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-21 22:38:48,116 INFO L275 PluginConnector]: CDTParser initialized [2020-10-21 22:38:48,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-21 22:38:48,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6f272344/9304e4044fbc4fa2815778485bb85eb1/FLAG5e9129651 [2020-10-21 22:38:48,738 INFO L306 CDTParser]: Found 1 translation units. [2020-10-21 22:38:48,738 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-21 22:38:48,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6f272344/9304e4044fbc4fa2815778485bb85eb1/FLAG5e9129651 [2020-10-21 22:38:49,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6f272344/9304e4044fbc4fa2815778485bb85eb1 [2020-10-21 22:38:49,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-21 22:38:49,065 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-21 22:38:49,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-21 22:38:49,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-21 22:38:49,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-21 22:38:49,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 10:38:49" (1/1) ... [2020-10-21 22:38:49,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48f5325d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:49, skipping insertion in model container [2020-10-21 22:38:49,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 10:38:49" (1/1) ... [2020-10-21 22:38:49,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-21 22:38:49,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-21 22:38:49,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 22:38:49,614 INFO L203 MainTranslator]: Completed pre-run [2020-10-21 22:38:49,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 22:38:49,776 INFO L208 MainTranslator]: Completed translation [2020-10-21 22:38:49,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:49 WrapperNode [2020-10-21 22:38:49,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-21 22:38:49,778 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-21 22:38:49,778 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-21 22:38:49,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-21 22:38:49,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:49" (1/1) ... [2020-10-21 22:38:49,804 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:49" (1/1) ... [2020-10-21 22:38:49,828 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-21 22:38:49,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-21 22:38:49,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-21 22:38:49,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-21 22:38:49,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:49" (1/1) ... [2020-10-21 22:38:49,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:49" (1/1) ... [2020-10-21 22:38:49,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:49" (1/1) ... [2020-10-21 22:38:49,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:49" (1/1) ... [2020-10-21 22:38:49,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:49" (1/1) ... [2020-10-21 22:38:49,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:49" (1/1) ... [2020-10-21 22:38:49,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:49" (1/1) ... [2020-10-21 22:38:49,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-21 22:38:49,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-21 22:38:49,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-21 22:38:49,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-21 22:38:49,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:49" (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 [2020-10-21 22:38:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-21 22:38:49,936 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-21 22:38:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-21 22:38:49,936 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-21 22:38:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-21 22:38:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-21 22:38:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-21 22:38:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-21 22:38:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-21 22:38:49,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-21 22:38:49,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-21 22:38:49,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-21 22:38:49,942 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-21 22:38:50,305 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-21 22:38:50,306 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-21 22:38:50,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 10:38:50 BoogieIcfgContainer [2020-10-21 22:38:50,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-21 22:38:50,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-21 22:38:50,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-21 22:38:50,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-21 22:38:50,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 10:38:49" (1/3) ... [2020-10-21 22:38:50,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174167b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 10:38:50, skipping insertion in model container [2020-10-21 22:38:50,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:38:49" (2/3) ... [2020-10-21 22:38:50,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174167b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 10:38:50, skipping insertion in model container [2020-10-21 22:38:50,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 10:38:50" (3/3) ... [2020-10-21 22:38:50,343 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-10-21 22:38:50,354 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-21 22:38:50,354 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-21 22:38:50,363 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-21 22:38:50,364 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-21 22:38:50,393 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,393 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,393 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,394 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,394 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,394 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,395 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,395 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,395 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,396 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,396 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,396 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,396 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,397 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,397 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,397 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,397 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,398 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,398 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,398 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,399 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,399 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,399 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,400 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,400 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,400 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,400 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,401 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,404 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,405 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,405 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,406 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,406 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,406 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,413 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,413 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,414 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,414 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,414 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,414 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:38:50,417 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-21 22:38:50,434 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-21 22:38:50,463 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-21 22:38:50,463 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-21 22:38:50,464 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-21 22:38:50,464 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-21 22:38:50,464 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-21 22:38:50,464 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-21 22:38:50,464 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-21 22:38:50,465 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-21 22:38:50,485 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-21 22:38:50,485 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-21 22:38:50,488 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-21 22:38:50,490 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-10-21 22:38:50,543 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-10-21 22:38:50,543 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-21 22:38:50,549 INFO L80 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-10-21 22:38:50,552 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-10-21 22:38:51,412 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-21 22:38:51,843 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-21 22:38:52,217 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-21 22:38:52,344 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-21 22:38:52,367 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-10-21 22:38:52,368 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-10-21 22:38:52,376 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-21 22:38:52,399 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-21 22:38:52,402 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-21 22:38:52,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-21 22:38:52,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:52,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-21 22:38:52,410 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:52,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:52,414 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-10-21 22:38:52,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:52,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816702269] [2020-10-21 22:38:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:52,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816702269] [2020-10-21 22:38:52,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:38:52,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-21 22:38:52,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913265054] [2020-10-21 22:38:52,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-21 22:38:52,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:52,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-21 22:38:52,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-21 22:38:52,709 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-21 22:38:52,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:52,800 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-21 22:38:52,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-21 22:38:52,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-21 22:38:52,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:52,820 INFO L225 Difference]: With dead ends: 75 [2020-10-21 22:38:52,820 INFO L226 Difference]: Without dead ends: 42 [2020-10-21 22:38:52,822 INFO L677 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 [2020-10-21 22:38:52,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-21 22:38:52,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-21 22:38:52,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 22:38:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-21 22:38:52,879 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-21 22:38:52,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:52,879 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-21 22:38:52,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-21 22:38:52,880 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-21 22:38:52,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 22:38:52,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:52,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:52,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-21 22:38:52,894 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:52,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:52,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-10-21 22:38:52,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:52,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760143487] [2020-10-21 22:38:52,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:53,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:53,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760143487] [2020-10-21 22:38:53,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:38:53,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 22:38:53,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436673098] [2020-10-21 22:38:53,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 22:38:53,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:53,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 22:38:53,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-21 22:38:53,064 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-21 22:38:53,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:53,106 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-21 22:38:53,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-21 22:38:53,108 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 22:38:53,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:53,109 INFO L225 Difference]: With dead ends: 56 [2020-10-21 22:38:53,109 INFO L226 Difference]: Without dead ends: 50 [2020-10-21 22:38:53,111 INFO L677 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 [2020-10-21 22:38:53,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-21 22:38:53,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-21 22:38:53,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 22:38:53,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-21 22:38:53,122 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-21 22:38:53,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:53,123 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-21 22:38:53,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 22:38:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-21 22:38:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 22:38:53,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:53,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:53,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-21 22:38:53,125 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:53,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:53,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-10-21 22:38:53,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:53,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411831756] [2020-10-21 22:38:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:53,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411831756] [2020-10-21 22:38:53,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:38:53,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 22:38:53,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221115299] [2020-10-21 22:38:53,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 22:38:53,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:53,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 22:38:53,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-21 22:38:53,281 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-21 22:38:53,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:53,397 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-10-21 22:38:53,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 22:38:53,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 22:38:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:53,398 INFO L225 Difference]: With dead ends: 54 [2020-10-21 22:38:53,399 INFO L226 Difference]: Without dead ends: 47 [2020-10-21 22:38:53,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-21 22:38:53,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-21 22:38:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-21 22:38:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-21 22:38:53,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-10-21 22:38:53,406 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-10-21 22:38:53,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:53,407 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-10-21 22:38:53,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 22:38:53,407 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-10-21 22:38:53,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 22:38:53,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:53,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:53,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-21 22:38:53,408 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:53,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:53,408 INFO L82 PathProgramCache]: Analyzing trace with hash 2101929440, now seen corresponding path program 2 times [2020-10-21 22:38:53,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:53,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10914422] [2020-10-21 22:38:53,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:53,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10914422] [2020-10-21 22:38:53,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:38:53,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 22:38:53,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009835004] [2020-10-21 22:38:53,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 22:38:53,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:53,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 22:38:53,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-21 22:38:53,511 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-10-21 22:38:53,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:53,608 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2020-10-21 22:38:53,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 22:38:53,608 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 22:38:53,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:53,610 INFO L225 Difference]: With dead ends: 59 [2020-10-21 22:38:53,610 INFO L226 Difference]: Without dead ends: 53 [2020-10-21 22:38:53,610 INFO L677 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 [2020-10-21 22:38:53,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-21 22:38:53,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-10-21 22:38:53,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 22:38:53,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 96 transitions. [2020-10-21 22:38:53,625 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 96 transitions. Word has length 10 [2020-10-21 22:38:53,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:53,625 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 96 transitions. [2020-10-21 22:38:53,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 22:38:53,626 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 96 transitions. [2020-10-21 22:38:53,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 22:38:53,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:53,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:53,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-21 22:38:53,630 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:53,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:53,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 3 times [2020-10-21 22:38:53,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:53,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705028243] [2020-10-21 22:38:53,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:53,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705028243] [2020-10-21 22:38:53,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:38:53,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 22:38:53,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783822013] [2020-10-21 22:38:53,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 22:38:53,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:53,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 22:38:53,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-21 22:38:53,718 INFO L87 Difference]: Start difference. First operand 41 states and 96 transitions. Second operand 6 states. [2020-10-21 22:38:53,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:53,810 INFO L93 Difference]: Finished difference Result 65 states and 152 transitions. [2020-10-21 22:38:53,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 22:38:53,811 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 22:38:53,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:53,812 INFO L225 Difference]: With dead ends: 65 [2020-10-21 22:38:53,812 INFO L226 Difference]: Without dead ends: 52 [2020-10-21 22:38:53,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-21 22:38:53,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-21 22:38:53,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-10-21 22:38:53,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 22:38:53,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-10-21 22:38:53,818 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-10-21 22:38:53,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:53,819 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-10-21 22:38:53,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 22:38:53,819 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-10-21 22:38:53,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:38:53,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:53,820 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:53,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-21 22:38:53,821 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:53,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:53,821 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 4 times [2020-10-21 22:38:53,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:53,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124715947] [2020-10-21 22:38:53,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:53,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124715947] [2020-10-21 22:38:53,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087523824] [2020-10-21 22:38:53,882 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 [2020-10-21 22:38:53,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:38:53,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:53,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 22:38:53,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:53,997 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:38:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:54,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:54,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-21 22:38:54,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794913246] [2020-10-21 22:38:54,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 22:38:54,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:54,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 22:38:54,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-21 22:38:54,012 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-10-21 22:38:54,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:54,200 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-10-21 22:38:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:38:54,202 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-21 22:38:54,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:54,203 INFO L225 Difference]: With dead ends: 63 [2020-10-21 22:38:54,204 INFO L226 Difference]: Without dead ends: 54 [2020-10-21 22:38:54,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:38:54,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-21 22:38:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-10-21 22:38:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-21 22:38:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-10-21 22:38:54,210 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-10-21 22:38:54,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:54,210 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-10-21 22:38:54,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 22:38:54,210 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-10-21 22:38:54,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:38:54,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:54,211 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:54,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-21 22:38:54,414 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:54,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:54,415 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 5 times [2020-10-21 22:38:54,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:54,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505539228] [2020-10-21 22:38:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:54,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505539228] [2020-10-21 22:38:54,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518683310] [2020-10-21 22:38:54,488 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 [2020-10-21 22:38:54,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:38:54,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:54,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 22:38:54,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:54,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:38:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:54,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:54,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-21 22:38:54,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559499480] [2020-10-21 22:38:54,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 22:38:54,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:54,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 22:38:54,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-21 22:38:54,577 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 8 states. [2020-10-21 22:38:54,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:54,701 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-10-21 22:38:54,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-21 22:38:54,701 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-21 22:38:54,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:54,702 INFO L225 Difference]: With dead ends: 56 [2020-10-21 22:38:54,703 INFO L226 Difference]: Without dead ends: 51 [2020-10-21 22:38:54,703 INFO L677 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 [2020-10-21 22:38:54,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-21 22:38:54,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-10-21 22:38:54,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-21 22:38:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-21 22:38:54,709 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-21 22:38:54,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:54,709 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-21 22:38:54,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 22:38:54,709 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-21 22:38:54,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:38:54,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:54,710 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:54,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:54,923 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:54,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:54,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 6 times [2020-10-21 22:38:54,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:54,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830229095] [2020-10-21 22:38:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:55,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830229095] [2020-10-21 22:38:55,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087280928] [2020-10-21 22:38:55,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 22:38:55,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 22:38:55,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:55,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:38:55,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:55,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:38:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:55,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:55,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-21 22:38:55,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371415038] [2020-10-21 22:38:55,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 22:38:55,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:55,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 22:38:55,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-21 22:38:55,097 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-21 22:38:55,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:55,225 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-10-21 22:38:55,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 22:38:55,225 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-21 22:38:55,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:55,226 INFO L225 Difference]: With dead ends: 56 [2020-10-21 22:38:55,226 INFO L226 Difference]: Without dead ends: 50 [2020-10-21 22:38:55,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:38:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-21 22:38:55,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-10-21 22:38:55,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-21 22:38:55,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-21 22:38:55,232 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-10-21 22:38:55,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:55,232 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-21 22:38:55,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 22:38:55,233 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-21 22:38:55,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:38:55,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:55,233 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:55,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:55,445 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:55,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:55,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 7 times [2020-10-21 22:38:55,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:55,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688761426] [2020-10-21 22:38:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:55,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688761426] [2020-10-21 22:38:55,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120022125] [2020-10-21 22:38:55,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 22:38:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:55,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:38:55,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:55,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:38:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:55,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:55,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-21 22:38:55,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447880110] [2020-10-21 22:38:55,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 22:38:55,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:55,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 22:38:55,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-21 22:38:55,601 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-10-21 22:38:55,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:55,781 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-10-21 22:38:55,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-21 22:38:55,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-21 22:38:55,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:55,782 INFO L225 Difference]: With dead ends: 63 [2020-10-21 22:38:55,783 INFO L226 Difference]: Without dead ends: 58 [2020-10-21 22:38:55,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-21 22:38:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-21 22:38:55,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-10-21 22:38:55,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 22:38:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-21 22:38:55,788 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 12 [2020-10-21 22:38:55,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:55,788 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-21 22:38:55,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 22:38:55,788 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-21 22:38:55,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:38:55,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:55,789 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:55,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:56,000 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:56,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:56,001 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 8 times [2020-10-21 22:38:56,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:56,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072248236] [2020-10-21 22:38:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:56,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072248236] [2020-10-21 22:38:56,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376440066] [2020-10-21 22:38:56,064 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 [2020-10-21 22:38:56,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:38:56,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:56,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:38:56,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:56,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:56,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-21 22:38:56,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830950121] [2020-10-21 22:38:56,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 22:38:56,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:56,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 22:38:56,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-21 22:38:56,177 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-10-21 22:38:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:56,359 INFO L93 Difference]: Finished difference Result 71 states and 167 transitions. [2020-10-21 22:38:56,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:38:56,359 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-21 22:38:56,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:56,360 INFO L225 Difference]: With dead ends: 71 [2020-10-21 22:38:56,361 INFO L226 Difference]: Without dead ends: 62 [2020-10-21 22:38:56,361 INFO L677 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 [2020-10-21 22:38:56,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-21 22:38:56,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-10-21 22:38:56,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-21 22:38:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-21 22:38:56,366 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-10-21 22:38:56,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:56,366 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-21 22:38:56,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 22:38:56,367 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-21 22:38:56,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:56,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:56,368 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:56,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-21 22:38:56,581 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:56,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:56,582 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 9 times [2020-10-21 22:38:56,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:56,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103480576] [2020-10-21 22:38:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:56,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103480576] [2020-10-21 22:38:56,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10918502] [2020-10-21 22:38:56,685 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 [2020-10-21 22:38:56,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 22:38:56,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:56,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:38:56,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:56,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:38:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:56,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:56,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-21 22:38:56,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655781382] [2020-10-21 22:38:56,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 22:38:56,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:56,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 22:38:56,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-21 22:38:56,802 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-21 22:38:57,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:57,066 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-10-21 22:38:57,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:38:57,066 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-21 22:38:57,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:57,067 INFO L225 Difference]: With dead ends: 72 [2020-10-21 22:38:57,067 INFO L226 Difference]: Without dead ends: 63 [2020-10-21 22:38:57,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-21 22:38:57,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-21 22:38:57,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-10-21 22:38:57,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 22:38:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-21 22:38:57,074 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-10-21 22:38:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:57,075 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-21 22:38:57,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 22:38:57,075 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-21 22:38:57,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:57,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:57,077 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:57,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:57,292 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:57,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:57,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 10 times [2020-10-21 22:38:57,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:57,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851335322] [2020-10-21 22:38:57,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:57,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:57,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851335322] [2020-10-21 22:38:57,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230643834] [2020-10-21 22:38:57,354 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 [2020-10-21 22:38:57,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:38:57,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:57,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:38:57,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:57,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:38:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:57,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:57,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-21 22:38:57,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622128583] [2020-10-21 22:38:57,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 22:38:57,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:57,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 22:38:57,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-21 22:38:57,453 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 10 states. [2020-10-21 22:38:57,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:57,657 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-21 22:38:57,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-21 22:38:57,665 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-21 22:38:57,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:57,665 INFO L225 Difference]: With dead ends: 64 [2020-10-21 22:38:57,665 INFO L226 Difference]: Without dead ends: 59 [2020-10-21 22:38:57,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-21 22:38:57,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-21 22:38:57,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-10-21 22:38:57,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-21 22:38:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-21 22:38:57,676 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-21 22:38:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:57,676 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-21 22:38:57,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 22:38:57,677 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-21 22:38:57,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 22:38:57,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:57,683 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:57,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:57,884 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:57,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:57,885 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 11 times [2020-10-21 22:38:57,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:57,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545747991] [2020-10-21 22:38:57,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:57,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545747991] [2020-10-21 22:38:57,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086000851] [2020-10-21 22:38:57,992 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 [2020-10-21 22:38:58,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 22:38:58,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:58,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 22:38:58,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:58,053 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:38:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:58,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:58,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-21 22:38:58,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377148863] [2020-10-21 22:38:58,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 22:38:58,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:58,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 22:38:58,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-21 22:38:58,072 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-21 22:38:58,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:58,241 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-10-21 22:38:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:38:58,241 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-21 22:38:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:58,242 INFO L225 Difference]: With dead ends: 64 [2020-10-21 22:38:58,242 INFO L226 Difference]: Without dead ends: 58 [2020-10-21 22:38:58,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:38:58,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-21 22:38:58,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-21 22:38:58,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-21 22:38:58,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-21 22:38:58,247 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-10-21 22:38:58,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:58,247 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-21 22:38:58,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 22:38:58,248 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-21 22:38:58,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 22:38:58,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:58,248 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:58,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-21 22:38:58,450 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:58,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:58,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 12 times [2020-10-21 22:38:58,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:58,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324807466] [2020-10-21 22:38:58,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:58,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324807466] [2020-10-21 22:38:58,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16025512] [2020-10-21 22:38:58,520 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 [2020-10-21 22:38:58,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 22:38:58,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:58,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:38:58,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:58,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:38:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:58,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:58,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-21 22:38:58,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302444647] [2020-10-21 22:38:58,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:38:58,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:58,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:38:58,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:38:58,623 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-10-21 22:38:58,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:58,928 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-21 22:38:58,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-21 22:38:58,929 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-21 22:38:58,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:58,929 INFO L225 Difference]: With dead ends: 73 [2020-10-21 22:38:58,929 INFO L226 Difference]: Without dead ends: 68 [2020-10-21 22:38:58,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-21 22:38:58,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-21 22:38:58,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-10-21 22:38:58,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-21 22:38:58,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-21 22:38:58,935 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 14 [2020-10-21 22:38:58,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:58,935 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-21 22:38:58,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:38:58,935 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-21 22:38:58,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 22:38:58,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:58,936 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:59,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:59,143 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:59,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:59,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 13 times [2020-10-21 22:38:59,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:59,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899551836] [2020-10-21 22:38:59,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:59,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899551836] [2020-10-21 22:38:59,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367084447] [2020-10-21 22:38:59,225 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 [2020-10-21 22:38:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:59,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:38:59,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:59,319 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:38:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:59,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:59,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-21 22:38:59,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525535592] [2020-10-21 22:38:59,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:38:59,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:59,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:38:59,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:38:59,329 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-10-21 22:38:59,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:59,626 INFO L93 Difference]: Finished difference Result 81 states and 191 transitions. [2020-10-21 22:38:59,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 22:38:59,631 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-21 22:38:59,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:59,632 INFO L225 Difference]: With dead ends: 81 [2020-10-21 22:38:59,632 INFO L226 Difference]: Without dead ends: 72 [2020-10-21 22:38:59,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-10-21 22:38:59,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-21 22:38:59,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-21 22:38:59,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-21 22:38:59,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-21 22:38:59,637 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-10-21 22:38:59,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:59,637 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-21 22:38:59,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:38:59,637 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-21 22:38:59,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-21 22:38:59,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:59,638 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:59,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-21 22:38:59,849 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:59,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:59,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 14 times [2020-10-21 22:38:59,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:59,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16898235] [2020-10-21 22:38:59,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:59,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:59,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16898235] [2020-10-21 22:38:59,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708713822] [2020-10-21 22:38:59,968 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 [2020-10-21 22:39:00,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:39:00,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:00,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 22:39:00,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:00,052 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:00,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:00,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-21 22:39:00,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891572438] [2020-10-21 22:39:00,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 22:39:00,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:00,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 22:39:00,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-21 22:39:00,072 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-21 22:39:00,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:00,436 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-10-21 22:39:00,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 22:39:00,437 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-21 22:39:00,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:00,438 INFO L225 Difference]: With dead ends: 82 [2020-10-21 22:39:00,438 INFO L226 Difference]: Without dead ends: 73 [2020-10-21 22:39:00,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-21 22:39:00,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-21 22:39:00,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-10-21 22:39:00,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-21 22:39:00,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-21 22:39:00,443 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-10-21 22:39:00,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:00,444 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-21 22:39:00,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 22:39:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-21 22:39:00,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-21 22:39:00,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:00,445 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:00,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-21 22:39:00,656 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:00,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:00,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 15 times [2020-10-21 22:39:00,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:00,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266512873] [2020-10-21 22:39:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:00,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266512873] [2020-10-21 22:39:00,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297085835] [2020-10-21 22:39:00,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 22:39:00,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-21 22:39:00,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:00,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 22:39:00,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:00,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:00,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:00,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-21 22:39:00,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332839776] [2020-10-21 22:39:00,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 22:39:00,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:00,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 22:39:00,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-21 22:39:00,825 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 12 states. [2020-10-21 22:39:01,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:01,119 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-10-21 22:39:01,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-21 22:39:01,119 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-21 22:39:01,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:01,120 INFO L225 Difference]: With dead ends: 72 [2020-10-21 22:39:01,121 INFO L226 Difference]: Without dead ends: 67 [2020-10-21 22:39:01,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:39:01,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-21 22:39:01,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-21 22:39:01,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-21 22:39:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-21 22:39:01,128 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-21 22:39:01,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:01,128 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-21 22:39:01,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 22:39:01,129 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-21 22:39:01,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 22:39:01,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:01,129 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:01,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-21 22:39:01,339 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:01,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:01,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 16 times [2020-10-21 22:39:01,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:01,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005999950] [2020-10-21 22:39:01,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:01,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005999950] [2020-10-21 22:39:01,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917855337] [2020-10-21 22:39:01,448 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 [2020-10-21 22:39:01,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:39:01,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:01,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 22:39:01,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:01,507 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:01,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:01,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-21 22:39:01,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481218063] [2020-10-21 22:39:01,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 22:39:01,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:01,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 22:39:01,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-21 22:39:01,520 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-21 22:39:01,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:01,705 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-10-21 22:39:01,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:39:01,705 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-21 22:39:01,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:01,706 INFO L225 Difference]: With dead ends: 72 [2020-10-21 22:39:01,706 INFO L226 Difference]: Without dead ends: 66 [2020-10-21 22:39:01,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-10-21 22:39:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-21 22:39:01,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-10-21 22:39:01,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-21 22:39:01,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-21 22:39:01,711 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-10-21 22:39:01,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:01,712 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-21 22:39:01,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 22:39:01,712 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-21 22:39:01,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 22:39:01,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:01,712 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:01,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-21 22:39:01,913 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:01,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:01,913 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 17 times [2020-10-21 22:39:01,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:01,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603588378] [2020-10-21 22:39:01,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:01,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603588378] [2020-10-21 22:39:01,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107323640] [2020-10-21 22:39:01,991 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 [2020-10-21 22:39:02,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-21 22:39:02,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:02,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 22:39:02,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:02,052 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:02,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:02,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-21 22:39:02,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080405884] [2020-10-21 22:39:02,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:39:02,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:02,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:39:02,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:39:02,072 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-10-21 22:39:02,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:02,451 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-21 22:39:02,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-21 22:39:02,452 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-21 22:39:02,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:02,453 INFO L225 Difference]: With dead ends: 83 [2020-10-21 22:39:02,453 INFO L226 Difference]: Without dead ends: 78 [2020-10-21 22:39:02,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-21 22:39:02,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-21 22:39:02,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2020-10-21 22:39:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-21 22:39:02,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-21 22:39:02,458 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 16 [2020-10-21 22:39:02,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:02,458 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-21 22:39:02,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:39:02,458 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-21 22:39:02,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 22:39:02,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:02,459 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:02,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:02,670 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:02,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:02,670 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 18 times [2020-10-21 22:39:02,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:02,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967215632] [2020-10-21 22:39:02,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:02,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967215632] [2020-10-21 22:39:02,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235881641] [2020-10-21 22:39:02,762 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 [2020-10-21 22:39:02,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-21 22:39:02,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:02,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 22:39:02,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:02,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:02,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:02,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-21 22:39:02,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322546462] [2020-10-21 22:39:02,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:39:02,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:02,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:39:02,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:39:02,885 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-10-21 22:39:03,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:03,327 INFO L93 Difference]: Finished difference Result 91 states and 215 transitions. [2020-10-21 22:39:03,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 22:39:03,328 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-21 22:39:03,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:03,329 INFO L225 Difference]: With dead ends: 91 [2020-10-21 22:39:03,329 INFO L226 Difference]: Without dead ends: 82 [2020-10-21 22:39:03,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-21 22:39:03,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-21 22:39:03,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-10-21 22:39:03,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-21 22:39:03,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-21 22:39:03,333 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-10-21 22:39:03,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:03,333 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-21 22:39:03,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:39:03,334 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-21 22:39:03,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-21 22:39:03,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:03,334 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:03,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:03,538 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:03,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:03,538 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 19 times [2020-10-21 22:39:03,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:03,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907961335] [2020-10-21 22:39:03,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:03,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907961335] [2020-10-21 22:39:03,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750786280] [2020-10-21 22:39:03,646 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 [2020-10-21 22:39:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:03,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 22:39:03,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:03,725 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:03,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:03,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-21 22:39:03,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546535999] [2020-10-21 22:39:03,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 22:39:03,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:03,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 22:39:03,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-21 22:39:03,740 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-21 22:39:04,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:04,219 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-21 22:39:04,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 22:39:04,219 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-21 22:39:04,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:04,221 INFO L225 Difference]: With dead ends: 92 [2020-10-21 22:39:04,221 INFO L226 Difference]: Without dead ends: 83 [2020-10-21 22:39:04,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 22:39:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-21 22:39:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-10-21 22:39:04,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-21 22:39:04,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-21 22:39:04,225 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-10-21 22:39:04,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:04,226 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-21 22:39:04,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 22:39:04,226 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-21 22:39:04,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-21 22:39:04,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:04,227 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:04,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:04,440 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:04,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:04,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 20 times [2020-10-21 22:39:04,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:04,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717199851] [2020-10-21 22:39:04,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:04,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717199851] [2020-10-21 22:39:04,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565210123] [2020-10-21 22:39:04,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 22:39:04,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:39:04,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:04,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-21 22:39:04,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:04,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:04,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-21 22:39:04,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070243016] [2020-10-21 22:39:04,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 22:39:04,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:04,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 22:39:04,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-21 22:39:04,669 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 14 states. [2020-10-21 22:39:05,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:05,208 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-10-21 22:39:05,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-21 22:39:05,208 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-21 22:39:05,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:05,209 INFO L225 Difference]: With dead ends: 80 [2020-10-21 22:39:05,209 INFO L226 Difference]: Without dead ends: 75 [2020-10-21 22:39:05,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=734, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 22:39:05,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-21 22:39:05,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-10-21 22:39:05,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-21 22:39:05,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-21 22:39:05,215 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-21 22:39:05,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:05,215 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-21 22:39:05,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 22:39:05,215 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-21 22:39:05,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 22:39:05,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:05,217 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:05,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-21 22:39:05,417 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:05,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:05,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 21 times [2020-10-21 22:39:05,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:05,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338432501] [2020-10-21 22:39:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:05,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338432501] [2020-10-21 22:39:05,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750165101] [2020-10-21 22:39:05,552 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 [2020-10-21 22:39:05,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-21 22:39:05,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:05,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-21 22:39:05,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:05,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:05,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:05,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-21 22:39:05,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624690681] [2020-10-21 22:39:05,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 22:39:05,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:05,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 22:39:05,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-21 22:39:05,650 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-21 22:39:05,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:05,888 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-21 22:39:05,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:39:05,888 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-21 22:39:05,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:05,889 INFO L225 Difference]: With dead ends: 80 [2020-10-21 22:39:05,889 INFO L226 Difference]: Without dead ends: 74 [2020-10-21 22:39:05,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:39:05,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-21 22:39:05,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-10-21 22:39:05,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-21 22:39:05,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-21 22:39:05,892 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-10-21 22:39:05,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:05,893 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-21 22:39:05,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 22:39:05,893 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-21 22:39:05,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 22:39:05,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:05,893 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:06,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-21 22:39:06,094 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:06,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:06,095 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 22 times [2020-10-21 22:39:06,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:06,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415518684] [2020-10-21 22:39:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:06,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415518684] [2020-10-21 22:39:06,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476418788] [2020-10-21 22:39:06,202 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 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 [2020-10-21 22:39:06,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:39:06,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:06,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-21 22:39:06,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:06,272 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:06,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:06,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-21 22:39:06,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474345848] [2020-10-21 22:39:06,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:39:06,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:06,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:39:06,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:39:06,290 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-10-21 22:39:06,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:06,801 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-21 22:39:06,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-21 22:39:06,801 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-21 22:39:06,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:06,803 INFO L225 Difference]: With dead ends: 93 [2020-10-21 22:39:06,803 INFO L226 Difference]: Without dead ends: 88 [2020-10-21 22:39:06,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 22:39:06,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-21 22:39:06,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 53. [2020-10-21 22:39:06,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-21 22:39:06,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-21 22:39:06,807 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 18 [2020-10-21 22:39:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:06,808 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-21 22:39:06,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:39:06,808 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-21 22:39:06,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 22:39:06,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:06,808 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:07,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-21 22:39:07,019 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:07,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:07,019 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 23 times [2020-10-21 22:39:07,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:07,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758579204] [2020-10-21 22:39:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:07,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758579204] [2020-10-21 22:39:07,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732374823] [2020-10-21 22:39:07,124 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 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 [2020-10-21 22:39:07,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-21 22:39:07,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:07,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-21 22:39:07,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:07,216 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:07,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:07,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-21 22:39:07,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117259436] [2020-10-21 22:39:07,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:39:07,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:07,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:39:07,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:39:07,250 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-10-21 22:39:07,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:07,799 INFO L93 Difference]: Finished difference Result 101 states and 239 transitions. [2020-10-21 22:39:07,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 22:39:07,799 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-21 22:39:07,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:07,800 INFO L225 Difference]: With dead ends: 101 [2020-10-21 22:39:07,801 INFO L226 Difference]: Without dead ends: 92 [2020-10-21 22:39:07,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 22:39:07,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-21 22:39:07,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-21 22:39:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-21 22:39:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-21 22:39:07,805 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-10-21 22:39:07,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:07,806 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-21 22:39:07,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:39:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-21 22:39:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-21 22:39:07,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:07,807 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:08,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-21 22:39:08,011 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:08,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:08,012 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 24 times [2020-10-21 22:39:08,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:08,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950922836] [2020-10-21 22:39:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:08,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950922836] [2020-10-21 22:39:08,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68539924] [2020-10-21 22:39:08,114 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 [2020-10-21 22:39:08,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-21 22:39:08,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:08,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-21 22:39:08,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:08,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:08,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-21 22:39:08,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851214231] [2020-10-21 22:39:08,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:39:08,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:08,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:39:08,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-21 22:39:08,223 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-21 22:39:08,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:08,822 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-10-21 22:39:08,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 22:39:08,822 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-21 22:39:08,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:08,823 INFO L225 Difference]: With dead ends: 102 [2020-10-21 22:39:08,824 INFO L226 Difference]: Without dead ends: 93 [2020-10-21 22:39:08,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-10-21 22:39:08,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-21 22:39:08,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-10-21 22:39:08,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-21 22:39:08,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-21 22:39:08,827 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-10-21 22:39:08,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:08,828 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-21 22:39:08,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 22:39:08,828 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-21 22:39:08,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-21 22:39:08,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:08,830 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:09,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-21 22:39:09,032 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:09,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:09,032 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 25 times [2020-10-21 22:39:09,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:09,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782124749] [2020-10-21 22:39:09,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:09,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782124749] [2020-10-21 22:39:09,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850684342] [2020-10-21 22:39:09,144 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 [2020-10-21 22:39:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:09,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-21 22:39:09,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:09,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:09,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:09,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-21 22:39:09,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691575645] [2020-10-21 22:39:09,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:39:09,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:09,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:39:09,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-21 22:39:09,278 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 16 states. [2020-10-21 22:39:09,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:09,815 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-10-21 22:39:09,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-21 22:39:09,816 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-21 22:39:09,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:09,817 INFO L225 Difference]: With dead ends: 88 [2020-10-21 22:39:09,817 INFO L226 Difference]: Without dead ends: 83 [2020-10-21 22:39:09,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-21 22:39:09,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-21 22:39:09,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-10-21 22:39:09,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-21 22:39:09,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-21 22:39:09,821 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-21 22:39:09,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:09,822 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-21 22:39:09,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 22:39:09,822 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-21 22:39:09,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-21 22:39:09,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:09,823 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:10,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:10,033 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:10,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:10,034 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 26 times [2020-10-21 22:39:10,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:10,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275982150] [2020-10-21 22:39:10,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:10,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275982150] [2020-10-21 22:39:10,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759099291] [2020-10-21 22:39:10,203 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 [2020-10-21 22:39:10,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:39:10,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:10,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 22:39:10,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:10,255 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:10,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:10,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-21 22:39:10,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606340061] [2020-10-21 22:39:10,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:39:10,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:10,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:39:10,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-21 22:39:10,270 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-21 22:39:10,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:10,584 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-10-21 22:39:10,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 22:39:10,584 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-21 22:39:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:10,585 INFO L225 Difference]: With dead ends: 88 [2020-10-21 22:39:10,585 INFO L226 Difference]: Without dead ends: 82 [2020-10-21 22:39:10,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2020-10-21 22:39:10,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-21 22:39:10,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-10-21 22:39:10,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-21 22:39:10,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-21 22:39:10,589 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-10-21 22:39:10,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:10,589 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-21 22:39:10,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 22:39:10,589 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-21 22:39:10,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-21 22:39:10,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:10,590 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:10,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-21 22:39:10,791 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:10,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:10,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 27 times [2020-10-21 22:39:10,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:10,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465385] [2020-10-21 22:39:10,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:10,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465385] [2020-10-21 22:39:10,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523300168] [2020-10-21 22:39:10,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 22:39:10,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-21 22:39:10,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:10,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-21 22:39:10,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:10,997 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:11,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:11,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-21 22:39:11,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737351901] [2020-10-21 22:39:11,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 22:39:11,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:11,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 22:39:11,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:39:11,012 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 17 states. [2020-10-21 22:39:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:11,713 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-21 22:39:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-21 22:39:11,714 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-21 22:39:11,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:11,715 INFO L225 Difference]: With dead ends: 103 [2020-10-21 22:39:11,715 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 22:39:11,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-21 22:39:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 22:39:11,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2020-10-21 22:39:11,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-21 22:39:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-10-21 22:39:11,720 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 20 [2020-10-21 22:39:11,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:11,720 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-10-21 22:39:11,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 22:39:11,720 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-10-21 22:39:11,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-21 22:39:11,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:11,721 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:11,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-21 22:39:11,931 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:11,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:11,931 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 28 times [2020-10-21 22:39:11,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:11,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578557277] [2020-10-21 22:39:11,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:12,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578557277] [2020-10-21 22:39:12,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416615839] [2020-10-21 22:39:12,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 22:39:12,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:39:12,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:12,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-21 22:39:12,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:12,203 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:12,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:12,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-21 22:39:12,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077022408] [2020-10-21 22:39:12,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 22:39:12,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:12,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 22:39:12,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:39:12,217 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-10-21 22:39:12,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:12,917 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-21 22:39:12,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-21 22:39:12,918 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-21 22:39:12,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:12,919 INFO L225 Difference]: With dead ends: 111 [2020-10-21 22:39:12,919 INFO L226 Difference]: Without dead ends: 102 [2020-10-21 22:39:12,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-21 22:39:12,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-21 22:39:12,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-10-21 22:39:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-21 22:39:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-21 22:39:12,923 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 20 [2020-10-21 22:39:12,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:12,924 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-21 22:39:12,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 22:39:12,924 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-21 22:39:12,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-21 22:39:12,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:12,924 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:13,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:13,125 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:13,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:13,125 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 29 times [2020-10-21 22:39:13,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:13,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8887903] [2020-10-21 22:39:13,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:13,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8887903] [2020-10-21 22:39:13,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143621785] [2020-10-21 22:39:13,264 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 [2020-10-21 22:39:13,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-21 22:39:13,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:13,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 22:39:13,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:13,355 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:13,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:13,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-21 22:39:13,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485852100] [2020-10-21 22:39:13,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 22:39:13,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:13,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 22:39:13,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-21 22:39:13,370 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-21 22:39:14,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:14,141 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-10-21 22:39:14,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-21 22:39:14,145 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-21 22:39:14,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:14,146 INFO L225 Difference]: With dead ends: 112 [2020-10-21 22:39:14,146 INFO L226 Difference]: Without dead ends: 103 [2020-10-21 22:39:14,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-21 22:39:14,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-21 22:39:14,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-10-21 22:39:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-21 22:39:14,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-10-21 22:39:14,149 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-10-21 22:39:14,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:14,150 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-10-21 22:39:14,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 22:39:14,150 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-10-21 22:39:14,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-21 22:39:14,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:14,151 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:14,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:14,353 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:14,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:14,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 30 times [2020-10-21 22:39:14,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:14,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143991122] [2020-10-21 22:39:14,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:14,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143991122] [2020-10-21 22:39:14,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565513513] [2020-10-21 22:39:14,478 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 [2020-10-21 22:39:14,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-21 22:39:14,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:14,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 22:39:14,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:14,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:14,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:14,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-21 22:39:14,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746015561] [2020-10-21 22:39:14,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 22:39:14,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:14,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 22:39:14,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-21 22:39:14,577 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 18 states. [2020-10-21 22:39:15,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:15,253 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-10-21 22:39:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-21 22:39:15,254 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-21 22:39:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:15,255 INFO L225 Difference]: With dead ends: 96 [2020-10-21 22:39:15,255 INFO L226 Difference]: Without dead ends: 91 [2020-10-21 22:39:15,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-21 22:39:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-21 22:39:15,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-10-21 22:39:15,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-21 22:39:15,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-21 22:39:15,259 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-21 22:39:15,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:15,260 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-21 22:39:15,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 22:39:15,260 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-21 22:39:15,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-21 22:39:15,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:15,261 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:15,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-21 22:39:15,471 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:15,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:15,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 31 times [2020-10-21 22:39:15,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:15,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505644801] [2020-10-21 22:39:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:15,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505644801] [2020-10-21 22:39:15,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819315077] [2020-10-21 22:39:15,696 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 [2020-10-21 22:39:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:15,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 22:39:15,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:15,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:15,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:15,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-21 22:39:15,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108371726] [2020-10-21 22:39:15,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 22:39:15,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:15,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 22:39:15,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-21 22:39:15,787 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-21 22:39:16,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:16,165 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-21 22:39:16,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 22:39:16,165 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-21 22:39:16,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:16,167 INFO L225 Difference]: With dead ends: 96 [2020-10-21 22:39:16,167 INFO L226 Difference]: Without dead ends: 90 [2020-10-21 22:39:16,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=704, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 22:39:16,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-21 22:39:16,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2020-10-21 22:39:16,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-21 22:39:16,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-21 22:39:16,172 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-10-21 22:39:16,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:16,172 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-21 22:39:16,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 22:39:16,172 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-21 22:39:16,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-21 22:39:16,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:16,173 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:16,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:16,385 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:16,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 32 times [2020-10-21 22:39:16,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:16,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029631026] [2020-10-21 22:39:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:16,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029631026] [2020-10-21 22:39:16,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028896138] [2020-10-21 22:39:16,542 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 [2020-10-21 22:39:16,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:39:16,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:16,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-21 22:39:16,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:16,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:16,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:16,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-21 22:39:16,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244402788] [2020-10-21 22:39:16,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-21 22:39:16,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:16,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-21 22:39:16,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-21 22:39:16,638 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 19 states. [2020-10-21 22:39:17,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:17,434 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-21 22:39:17,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-21 22:39:17,435 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-21 22:39:17,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:17,436 INFO L225 Difference]: With dead ends: 113 [2020-10-21 22:39:17,437 INFO L226 Difference]: Without dead ends: 108 [2020-10-21 22:39:17,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-21 22:39:17,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-21 22:39:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 61. [2020-10-21 22:39:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-21 22:39:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-10-21 22:39:17,441 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 22 [2020-10-21 22:39:17,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:17,441 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-10-21 22:39:17,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-21 22:39:17,442 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-10-21 22:39:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-21 22:39:17,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:17,442 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:17,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-21 22:39:17,652 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:17,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 33 times [2020-10-21 22:39:17,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:17,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093348314] [2020-10-21 22:39:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:17,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093348314] [2020-10-21 22:39:17,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170913154] [2020-10-21 22:39:17,800 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 [2020-10-21 22:39:17,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-21 22:39:17,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:17,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 22:39:17,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:17,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:17,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-21 22:39:17,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955486042] [2020-10-21 22:39:17,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-21 22:39:17,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:17,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-21 22:39:17,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-21 22:39:17,971 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-10-21 22:39:18,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:18,809 INFO L93 Difference]: Finished difference Result 121 states and 287 transitions. [2020-10-21 22:39:18,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-21 22:39:18,809 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-21 22:39:18,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:18,811 INFO L225 Difference]: With dead ends: 121 [2020-10-21 22:39:18,811 INFO L226 Difference]: Without dead ends: 112 [2020-10-21 22:39:18,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=587, Invalid=1483, Unknown=0, NotChecked=0, Total=2070 [2020-10-21 22:39:18,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-21 22:39:18,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 77. [2020-10-21 22:39:18,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-21 22:39:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-21 22:39:18,815 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 22 [2020-10-21 22:39:18,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:18,816 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-21 22:39:18,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-21 22:39:18,816 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-21 22:39:18,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-21 22:39:18,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:18,817 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:19,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:19,017 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:19,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:19,018 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 34 times [2020-10-21 22:39:19,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:19,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527820718] [2020-10-21 22:39:19,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:19,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527820718] [2020-10-21 22:39:19,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196065849] [2020-10-21 22:39:19,177 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 [2020-10-21 22:39:19,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:39:19,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:19,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 22:39:19,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:19,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:19,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:19,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-21 22:39:19,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500067904] [2020-10-21 22:39:19,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-21 22:39:19,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:19,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-21 22:39:19,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-21 22:39:19,288 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-21 22:39:20,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:20,195 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-10-21 22:39:20,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-21 22:39:20,195 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-21 22:39:20,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:20,197 INFO L225 Difference]: With dead ends: 122 [2020-10-21 22:39:20,197 INFO L226 Difference]: Without dead ends: 113 [2020-10-21 22:39:20,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-21 22:39:20,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-21 22:39:20,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-10-21 22:39:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-21 22:39:20,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-10-21 22:39:20,200 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-10-21 22:39:20,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:20,201 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-10-21 22:39:20,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-21 22:39:20,201 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-10-21 22:39:20,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-21 22:39:20,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:20,202 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:20,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-21 22:39:20,404 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:20,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:20,404 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 35 times [2020-10-21 22:39:20,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:20,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052617059] [2020-10-21 22:39:20,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:20,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052617059] [2020-10-21 22:39:20,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912541982] [2020-10-21 22:39:20,569 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 [2020-10-21 22:39:20,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-21 22:39:20,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:20,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 22:39:20,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:20,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:20,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:20,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-21 22:39:20,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625527672] [2020-10-21 22:39:20,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-21 22:39:20,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:20,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-21 22:39:20,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-21 22:39:20,671 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 20 states. [2020-10-21 22:39:21,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:21,530 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-10-21 22:39:21,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-21 22:39:21,531 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-21 22:39:21,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:21,532 INFO L225 Difference]: With dead ends: 104 [2020-10-21 22:39:21,532 INFO L226 Difference]: Without dead ends: 99 [2020-10-21 22:39:21,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-21 22:39:21,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-21 22:39:21,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-10-21 22:39:21,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-21 22:39:21,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-21 22:39:21,537 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-21 22:39:21,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:21,537 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-21 22:39:21,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-21 22:39:21,538 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-21 22:39:21,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-21 22:39:21,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:21,538 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:21,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-21 22:39:21,750 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:21,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:21,750 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 36 times [2020-10-21 22:39:21,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:21,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039452845] [2020-10-21 22:39:21,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:22,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039452845] [2020-10-21 22:39:22,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112616059] [2020-10-21 22:39:22,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 22:39:22,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-21 22:39:22,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:22,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-21 22:39:22,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:22,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:22,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:22,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-21 22:39:22,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749229077] [2020-10-21 22:39:22,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-21 22:39:22,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:22,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-21 22:39:22,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-21 22:39:22,163 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-21 22:39:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:22,576 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-10-21 22:39:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 22:39:22,576 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-21 22:39:22,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:22,577 INFO L225 Difference]: With dead ends: 104 [2020-10-21 22:39:22,578 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 22:39:22,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2020-10-21 22:39:22,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 22:39:22,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-10-21 22:39:22,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-21 22:39:22,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-21 22:39:22,581 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-10-21 22:39:22,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:22,581 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-21 22:39:22,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-21 22:39:22,582 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-21 22:39:22,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-21 22:39:22,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:22,582 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:22,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-21 22:39:22,787 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:22,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:22,787 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 37 times [2020-10-21 22:39:22,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:22,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634006888] [2020-10-21 22:39:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:22,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634006888] [2020-10-21 22:39:22,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987569376] [2020-10-21 22:39:22,947 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 [2020-10-21 22:39:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:22,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-21 22:39:22,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:23,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:23,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:23,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-21 22:39:23,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30344880] [2020-10-21 22:39:23,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-21 22:39:23,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:23,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-21 22:39:23,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-21 22:39:23,056 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 21 states. [2020-10-21 22:39:24,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:24,053 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-21 22:39:24,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-21 22:39:24,055 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-21 22:39:24,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:24,057 INFO L225 Difference]: With dead ends: 123 [2020-10-21 22:39:24,057 INFO L226 Difference]: Without dead ends: 118 [2020-10-21 22:39:24,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-21 22:39:24,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-21 22:39:24,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 65. [2020-10-21 22:39:24,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-21 22:39:24,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-10-21 22:39:24,060 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 24 [2020-10-21 22:39:24,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:24,060 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-10-21 22:39:24,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-21 22:39:24,060 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-10-21 22:39:24,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-21 22:39:24,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:24,061 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:24,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-21 22:39:24,265 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:24,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:24,266 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 38 times [2020-10-21 22:39:24,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:24,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057188699] [2020-10-21 22:39:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:24,441 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:24,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057188699] [2020-10-21 22:39:24,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427142638] [2020-10-21 22:39:24,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 22:39:24,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:39:24,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:24,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-21 22:39:24,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:24,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:24,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-21 22:39:24,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428864986] [2020-10-21 22:39:24,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-21 22:39:24,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:24,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-21 22:39:24,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-21 22:39:24,538 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-10-21 22:39:25,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:25,501 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-21 22:39:25,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-21 22:39:25,502 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-21 22:39:25,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:25,503 INFO L225 Difference]: With dead ends: 131 [2020-10-21 22:39:25,503 INFO L226 Difference]: Without dead ends: 122 [2020-10-21 22:39:25,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-10-21 22:39:25,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-21 22:39:25,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 83. [2020-10-21 22:39:25,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-21 22:39:25,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-21 22:39:25,508 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 24 [2020-10-21 22:39:25,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:25,509 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-21 22:39:25,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-21 22:39:25,509 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-21 22:39:25,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-21 22:39:25,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:25,510 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:25,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-21 22:39:25,722 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:25,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:25,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 39 times [2020-10-21 22:39:25,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:25,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095809949] [2020-10-21 22:39:25,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:25,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:25,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095809949] [2020-10-21 22:39:25,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388297677] [2020-10-21 22:39:25,904 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 [2020-10-21 22:39:25,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-21 22:39:25,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:25,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-21 22:39:25,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:26,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:26,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:26,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-21 22:39:26,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083593024] [2020-10-21 22:39:26,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-21 22:39:26,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:26,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-21 22:39:26,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-21 22:39:26,027 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-21 22:39:27,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:27,133 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-10-21 22:39:27,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-21 22:39:27,134 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-21 22:39:27,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:27,135 INFO L225 Difference]: With dead ends: 132 [2020-10-21 22:39:27,136 INFO L226 Difference]: Without dead ends: 123 [2020-10-21 22:39:27,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-21 22:39:27,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-21 22:39:27,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-10-21 22:39:27,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-21 22:39:27,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-10-21 22:39:27,140 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-10-21 22:39:27,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:27,141 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-10-21 22:39:27,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-21 22:39:27,141 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-10-21 22:39:27,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-21 22:39:27,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:27,142 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:27,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-21 22:39:27,354 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:27,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:27,354 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 40 times [2020-10-21 22:39:27,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:27,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75613111] [2020-10-21 22:39:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:27,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75613111] [2020-10-21 22:39:27,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917993326] [2020-10-21 22:39:27,562 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 [2020-10-21 22:39:27,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:39:27,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:27,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-21 22:39:27,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:27,701 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:27,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:27,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-21 22:39:27,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25785929] [2020-10-21 22:39:27,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-21 22:39:27,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:27,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-21 22:39:27,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-21 22:39:27,725 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 22 states. [2020-10-21 22:39:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:28,858 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-10-21 22:39:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-21 22:39:28,859 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-21 22:39:28,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:28,861 INFO L225 Difference]: With dead ends: 112 [2020-10-21 22:39:28,861 INFO L226 Difference]: Without dead ends: 107 [2020-10-21 22:39:28,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-21 22:39:28,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-21 22:39:28,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-10-21 22:39:28,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-21 22:39:28,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-21 22:39:28,867 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-21 22:39:28,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:28,868 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-21 22:39:28,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-21 22:39:28,868 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-21 22:39:28,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-21 22:39:28,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:28,869 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:29,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-21 22:39:29,070 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:29,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:29,071 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 41 times [2020-10-21 22:39:29,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:29,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206715108] [2020-10-21 22:39:29,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:29,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206715108] [2020-10-21 22:39:29,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169713708] [2020-10-21 22:39:29,391 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 [2020-10-21 22:39:29,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-21 22:39:29,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:29,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-21 22:39:29,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:29,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:29,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:29,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-21 22:39:29,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997017429] [2020-10-21 22:39:29,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-21 22:39:29,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:29,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-21 22:39:29,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-21 22:39:29,483 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-21 22:39:29,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:29,997 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-21 22:39:29,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 22:39:29,998 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-21 22:39:29,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:30,000 INFO L225 Difference]: With dead ends: 112 [2020-10-21 22:39:30,000 INFO L226 Difference]: Without dead ends: 106 [2020-10-21 22:39:30,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=540, Invalid=1100, Unknown=0, NotChecked=0, Total=1640 [2020-10-21 22:39:30,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-21 22:39:30,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2020-10-21 22:39:30,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-21 22:39:30,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-10-21 22:39:30,005 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-10-21 22:39:30,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:30,005 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-10-21 22:39:30,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-21 22:39:30,006 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-10-21 22:39:30,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-21 22:39:30,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:30,006 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:30,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:30,218 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:30,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:30,218 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 42 times [2020-10-21 22:39:30,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:30,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760361059] [2020-10-21 22:39:30,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:30,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760361059] [2020-10-21 22:39:30,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987996861] [2020-10-21 22:39:30,460 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 [2020-10-21 22:39:30,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-21 22:39:30,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:30,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-21 22:39:30,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:30,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:30,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:30,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-21 22:39:30,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408719402] [2020-10-21 22:39:30,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 22:39:30,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:30,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 22:39:30,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-21 22:39:30,582 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 23 states. [2020-10-21 22:39:31,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:31,772 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-21 22:39:31,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-21 22:39:31,772 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-21 22:39:31,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:31,773 INFO L225 Difference]: With dead ends: 133 [2020-10-21 22:39:31,774 INFO L226 Difference]: Without dead ends: 128 [2020-10-21 22:39:31,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-21 22:39:31,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-21 22:39:31,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 69. [2020-10-21 22:39:31,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-21 22:39:31,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-10-21 22:39:31,783 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 26 [2020-10-21 22:39:31,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:31,783 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-10-21 22:39:31,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 22:39:31,783 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-10-21 22:39:31,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-21 22:39:31,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:31,784 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:31,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-21 22:39:31,985 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:31,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:31,985 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 43 times [2020-10-21 22:39:31,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:31,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529855968] [2020-10-21 22:39:31,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:32,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529855968] [2020-10-21 22:39:32,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143475097] [2020-10-21 22:39:32,211 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 [2020-10-21 22:39:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:32,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-21 22:39:32,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:32,298 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:32,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:32,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-21 22:39:32,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765999937] [2020-10-21 22:39:32,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 22:39:32,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:32,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 22:39:32,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-21 22:39:32,323 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-10-21 22:39:33,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:33,564 INFO L93 Difference]: Finished difference Result 141 states and 335 transitions. [2020-10-21 22:39:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-21 22:39:33,565 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-21 22:39:33,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:33,567 INFO L225 Difference]: With dead ends: 141 [2020-10-21 22:39:33,567 INFO L226 Difference]: Without dead ends: 132 [2020-10-21 22:39:33,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-21 22:39:33,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-21 22:39:33,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2020-10-21 22:39:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-21 22:39:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-21 22:39:33,572 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 26 [2020-10-21 22:39:33,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:33,572 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-21 22:39:33,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 22:39:33,572 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-21 22:39:33,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-21 22:39:33,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:33,573 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:33,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:33,784 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:33,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:33,784 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 44 times [2020-10-21 22:39:33,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:33,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162134961] [2020-10-21 22:39:33,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:34,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162134961] [2020-10-21 22:39:34,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377515172] [2020-10-21 22:39:34,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 22:39:34,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:39:34,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:34,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-21 22:39:34,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:34,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:39:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:34,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:34,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-21 22:39:34,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842697270] [2020-10-21 22:39:34,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-21 22:39:34,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:34,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-21 22:39:34,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-21 22:39:34,175 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-21 22:39:35,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:35,455 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-10-21 22:39:35,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-21 22:39:35,456 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-21 22:39:35,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:35,457 INFO L225 Difference]: With dead ends: 142 [2020-10-21 22:39:35,457 INFO L226 Difference]: Without dead ends: 133 [2020-10-21 22:39:35,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-21 22:39:35,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-21 22:39:35,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-10-21 22:39:35,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-21 22:39:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-10-21 22:39:35,461 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-10-21 22:39:35,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:35,462 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-10-21 22:39:35,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-21 22:39:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-10-21 22:39:35,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-21 22:39:35,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:35,462 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:35,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-21 22:39:35,673 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:35,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:35,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 45 times [2020-10-21 22:39:35,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:35,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339555503] [2020-10-21 22:39:35,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:35,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339555503] [2020-10-21 22:39:35,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816593957] [2020-10-21 22:39:35,893 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 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 [2020-10-21 22:39:35,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-21 22:39:35,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:35,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-21 22:39:35,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:35,992 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:36,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:36,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-21 22:39:36,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291646709] [2020-10-21 22:39:36,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-21 22:39:36,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:36,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-21 22:39:36,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-21 22:39:36,014 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 24 states. [2020-10-21 22:39:37,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:37,306 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-10-21 22:39:37,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-21 22:39:37,307 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-21 22:39:37,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:37,308 INFO L225 Difference]: With dead ends: 120 [2020-10-21 22:39:37,309 INFO L226 Difference]: Without dead ends: 115 [2020-10-21 22:39:37,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-21 22:39:37,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-21 22:39:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-10-21 22:39:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-21 22:39:37,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-21 22:39:37,313 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-21 22:39:37,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:37,313 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-21 22:39:37,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-21 22:39:37,314 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-21 22:39:37,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-21 22:39:37,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:37,314 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:37,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:37,524 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:37,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:37,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 46 times [2020-10-21 22:39:37,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:37,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860992396] [2020-10-21 22:39:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:37,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860992396] [2020-10-21 22:39:37,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827399472] [2020-10-21 22:39:37,878 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 [2020-10-21 22:39:37,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:39:37,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:37,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-21 22:39:37,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:37,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:37,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:37,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-21 22:39:37,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514214069] [2020-10-21 22:39:37,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-21 22:39:37,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:37,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-21 22:39:37,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-10-21 22:39:37,952 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-21 22:39:38,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:38,541 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-10-21 22:39:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 22:39:38,542 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-21 22:39:38,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:38,543 INFO L225 Difference]: With dead ends: 120 [2020-10-21 22:39:38,543 INFO L226 Difference]: Without dead ends: 114 [2020-10-21 22:39:38,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=649, Invalid=1331, Unknown=0, NotChecked=0, Total=1980 [2020-10-21 22:39:38,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-21 22:39:38,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2020-10-21 22:39:38,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-21 22:39:38,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-10-21 22:39:38,548 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 28 [2020-10-21 22:39:38,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:38,548 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-10-21 22:39:38,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-21 22:39:38,548 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-10-21 22:39:38,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-21 22:39:38,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:38,549 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:38,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-21 22:39:38,750 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:38,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:38,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1507485925, now seen corresponding path program 47 times [2020-10-21 22:39:38,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:38,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916836078] [2020-10-21 22:39:38,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:39,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916836078] [2020-10-21 22:39:39,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349972634] [2020-10-21 22:39:39,011 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 [2020-10-21 22:39:39,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-21 22:39:39,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:39,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-21 22:39:39,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:39,101 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:39:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:39,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:39,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-21 22:39:39,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980427946] [2020-10-21 22:39:39,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-21 22:39:39,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:39,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-21 22:39:39,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:39:39,123 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 25 states. [2020-10-21 22:39:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:40,465 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-10-21 22:39:40,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-21 22:39:40,465 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-21 22:39:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:40,466 INFO L225 Difference]: With dead ends: 143 [2020-10-21 22:39:40,467 INFO L226 Difference]: Without dead ends: 138 [2020-10-21 22:39:40,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-10-21 22:39:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-21 22:39:40,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 73. [2020-10-21 22:39:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-21 22:39:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 177 transitions. [2020-10-21 22:39:40,470 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 177 transitions. Word has length 28 [2020-10-21 22:39:40,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:40,470 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 177 transitions. [2020-10-21 22:39:40,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-21 22:39:40,471 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 177 transitions. [2020-10-21 22:39:40,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-21 22:39:40,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:40,471 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:40,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-21 22:39:40,676 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:40,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:40,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1951734579, now seen corresponding path program 48 times [2020-10-21 22:39:40,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:40,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261199993] [2020-10-21 22:39:40,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:40,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261199993] [2020-10-21 22:39:40,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737056858] [2020-10-21 22:39:40,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 22:39:41,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-21 22:39:41,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:41,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-21 22:39:41,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:41,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:39:41,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-21 22:39:41,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684967571] [2020-10-21 22:39:41,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-21 22:39:41,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:41,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-21 22:39:41,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:39:41,074 INFO L87 Difference]: Start difference. First operand 73 states and 177 transitions. Second operand 25 states. [2020-10-21 22:39:42,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:42,417 INFO L93 Difference]: Finished difference Result 151 states and 359 transitions. [2020-10-21 22:39:42,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-21 22:39:42,418 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-21 22:39:42,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:42,420 INFO L225 Difference]: With dead ends: 151 [2020-10-21 22:39:42,420 INFO L226 Difference]: Without dead ends: 142 [2020-10-21 22:39:42,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1121, Invalid=2911, Unknown=0, NotChecked=0, Total=4032 [2020-10-21 22:39:42,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-21 22:39:42,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 95. [2020-10-21 22:39:42,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 22:39:42,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-10-21 22:39:42,425 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 28 [2020-10-21 22:39:42,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:42,425 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-10-21 22:39:42,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-21 22:39:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-10-21 22:39:42,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-21 22:39:42,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:42,426 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:42,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-21 22:39:42,639 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:42,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:42,639 INFO L82 PathProgramCache]: Analyzing trace with hash 512601796, now seen corresponding path program 49 times [2020-10-21 22:39:42,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:42,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264664517] [2020-10-21 22:39:42,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:42,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264664517] [2020-10-21 22:39:42,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652554705] [2020-10-21 22:39:42,782 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 [2020-10-21 22:39:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:42,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 22:39:42,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:42,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-21 22:39:42,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2020-10-21 22:39:42,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151791035] [2020-10-21 22:39:42,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:39:42,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:42,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:39:42,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-21 22:39:42,913 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 13 states. [2020-10-21 22:39:42,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:42,934 INFO L93 Difference]: Finished difference Result 404 states and 979 transitions. [2020-10-21 22:39:42,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:39:42,935 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-21 22:39:42,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:42,936 INFO L225 Difference]: With dead ends: 404 [2020-10-21 22:39:42,936 INFO L226 Difference]: Without dead ends: 46 [2020-10-21 22:39:42,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-21 22:39:42,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-21 22:39:42,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-21 22:39:42,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-21 22:39:42,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 80 transitions. [2020-10-21 22:39:42,938 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 80 transitions. Word has length 29 [2020-10-21 22:39:42,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:42,939 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 80 transitions. [2020-10-21 22:39:42,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:39:42,939 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 80 transitions. [2020-10-21 22:39:42,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-21 22:39:42,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:39:42,939 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:39:43,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-21 22:39:43,140 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:39:43,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:39:43,141 INFO L82 PathProgramCache]: Analyzing trace with hash 374257903, now seen corresponding path program 50 times [2020-10-21 22:39:43,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:39:43,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244213071] [2020-10-21 22:39:43,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:39:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:39:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 72 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:43,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244213071] [2020-10-21 22:39:43,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471129377] [2020-10-21 22:39:43,258 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 [2020-10-21 22:39:43,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:39:43,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:39:43,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 22:39:43,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:39:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:39:43,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-21 22:39:43,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2020-10-21 22:39:43,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011767888] [2020-10-21 22:39:43,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:39:43,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:39:43,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:39:43,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:39:43,342 INFO L87 Difference]: Start difference. First operand 46 states and 80 transitions. Second operand 13 states. [2020-10-21 22:39:43,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:39:43,363 INFO L93 Difference]: Finished difference Result 151 states and 219 transitions. [2020-10-21 22:39:43,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:39:43,364 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-21 22:39:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:39:43,364 INFO L225 Difference]: With dead ends: 151 [2020-10-21 22:39:43,364 INFO L226 Difference]: Without dead ends: 0 [2020-10-21 22:39:43,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:39:43,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-21 22:39:43,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-21 22:39:43,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-21 22:39:43,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-21 22:39:43,366 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-10-21 22:39:43,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:39:43,366 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-21 22:39:43,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:39:43,367 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-21 22:39:43,367 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-21 22:39:43,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:39:43,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 10:39:43 BasicIcfg [2020-10-21 22:39:43,581 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-21 22:39:43,583 INFO L168 Benchmark]: Toolchain (without parser) took 54523.52 ms. Allocated memory was 138.9 MB in the beginning and 489.7 MB in the end (delta: 350.7 MB). Free memory was 100.6 MB in the beginning and 111.9 MB in the end (delta: -11.4 MB). Peak memory consumption was 339.4 MB. Max. memory is 7.1 GB. [2020-10-21 22:39:43,583 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-10-21 22:39:43,584 INFO L168 Benchmark]: CACSL2BoogieTranslator took 710.28 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 99.7 MB in the beginning and 156.4 MB in the end (delta: -56.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-10-21 22:39:43,584 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.10 ms. Allocated memory is still 201.3 MB. Free memory was 156.4 MB in the beginning and 154.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-21 22:39:43,585 INFO L168 Benchmark]: Boogie Preprocessor took 31.90 ms. Allocated memory is still 201.3 MB. Free memory was 154.4 MB in the beginning and 153.5 MB in the end (delta: 991.0 kB). Peak memory consumption was 991.0 kB. Max. memory is 7.1 GB. [2020-10-21 22:39:43,585 INFO L168 Benchmark]: RCFGBuilder took 451.01 ms. Allocated memory is still 201.3 MB. Free memory was 153.5 MB in the beginning and 131.1 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-10-21 22:39:43,586 INFO L168 Benchmark]: TraceAbstraction took 53258.84 ms. Allocated memory was 201.3 MB in the beginning and 489.7 MB in the end (delta: 288.4 MB). Free memory was 130.1 MB in the beginning and 111.9 MB in the end (delta: 18.1 MB). Peak memory consumption was 306.5 MB. Max. memory is 7.1 GB. [2020-10-21 22:39:43,589 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 710.28 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 99.7 MB in the beginning and 156.4 MB in the end (delta: -56.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 50.10 ms. Allocated memory is still 201.3 MB. Free memory was 156.4 MB in the beginning and 154.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.90 ms. Allocated memory is still 201.3 MB. Free memory was 154.4 MB in the beginning and 153.5 MB in the end (delta: 991.0 kB). Peak memory consumption was 991.0 kB. Max. memory is 7.1 GB. * RCFGBuilder took 451.01 ms. Allocated memory is still 201.3 MB. Free memory was 153.5 MB in the beginning and 131.1 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 53258.84 ms. Allocated memory was 201.3 MB in the beginning and 489.7 MB in the end (delta: 288.4 MB). Free memory was 130.1 MB in the beginning and 111.9 MB in the end (delta: 18.1 MB). Peak memory consumption was 306.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 638 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.8s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - PositiveResult [Line: 685]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 53.1s, OverallIterations: 52, TraceHistogramMax: 11, AutomataDifference: 28.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 880 SDtfs, 3484 SDslu, 3350 SDs, 0 SdLazy, 4135 SolverSat, 2832 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2516 GetRequests, 822 SyntacticMatches, 36 SemanticMatches, 1658 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17314 ImplicationChecksByTransitivity, 27.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 52 MinimizatonAttempts, 1294 StatesRemovedByMinimization, 49 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 8.8s InterpolantComputationTime, 1924 NumberOfCodeBlocks, 1924 NumberOfCodeBlocksAsserted, 233 NumberOfCheckSat, 1825 ConstructedInterpolants, 0 QuantifiedInterpolants, 150101 SizeOfPredicates, 531 NumberOfNonLiveVariables, 6486 ConjunctsInSsa, 741 ConjunctsInUnsatCore, 99 InterpolantComputations, 7 PerfectInterpolantSequences, 362/3520 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...