/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c7e336b [2020-10-05 22:21:50,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-05 22:21:50,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-05 22:21:50,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-05 22:21:50,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-05 22:21:50,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-05 22:21:50,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-05 22:21:50,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-05 22:21:50,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-05 22:21:50,829 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-05 22:21:50,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-05 22:21:50,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-05 22:21:50,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-05 22:21:50,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-05 22:21:50,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-05 22:21:50,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-05 22:21:50,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-05 22:21:50,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-05 22:21:50,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-05 22:21:50,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-05 22:21:50,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-05 22:21:50,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-05 22:21:50,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-05 22:21:50,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-05 22:21:50,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-05 22:21:50,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-05 22:21:50,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-05 22:21:50,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-05 22:21:50,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-05 22:21:50,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-05 22:21:50,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-05 22:21:50,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-05 22:21:50,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-05 22:21:50,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-05 22:21:50,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-05 22:21:50,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-05 22:21:50,857 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-05 22:21:50,880 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-05 22:21:50,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-05 22:21:50,881 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-05 22:21:50,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-05 22:21:50,882 INFO L138 SettingsManager]: * Use SBE=true [2020-10-05 22:21:50,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-05 22:21:50,882 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-05 22:21:50,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-05 22:21:50,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-05 22:21:50,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-05 22:21:50,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-05 22:21:50,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-05 22:21:50,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-05 22:21:50,883 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-05 22:21:50,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-05 22:21:50,884 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-05 22:21:50,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-05 22:21:50,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-05 22:21:50,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-05 22:21:50,884 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-05 22:21:50,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-05 22:21:50,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-05 22:21:50,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-05 22:21:50,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-05 22:21:50,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-05 22:21:50,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-05 22:21:50,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-05 22:21:50,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-05 22:21:50,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-05 22:21:50,886 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-05 22:21:51,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-05 22:21:51,210 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-05 22:21:51,217 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-05 22:21:51,218 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-05 22:21:51,219 INFO L275 PluginConnector]: CDTParser initialized [2020-10-05 22:21:51,219 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-05 22:21:51,290 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c2984517/37baf4dcf8fd461986493d2a96aa3331/FLAGf4390ed98 [2020-10-05 22:21:51,745 INFO L306 CDTParser]: Found 1 translation units. [2020-10-05 22:21:51,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-05 22:21:51,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c2984517/37baf4dcf8fd461986493d2a96aa3331/FLAGf4390ed98 [2020-10-05 22:21:52,056 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c2984517/37baf4dcf8fd461986493d2a96aa3331 [2020-10-05 22:21:52,065 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-05 22:21:52,067 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-05 22:21:52,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-05 22:21:52,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-05 22:21:52,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-05 22:21:52,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 10:21:52" (1/1) ... [2020-10-05 22:21:52,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1315705f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:52, skipping insertion in model container [2020-10-05 22:21:52,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 10:21:52" (1/1) ... [2020-10-05 22:21:52,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-05 22:21:52,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-05 22:21:52,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 22:21:52,605 INFO L203 MainTranslator]: Completed pre-run [2020-10-05 22:21:52,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 22:21:52,730 INFO L208 MainTranslator]: Completed translation [2020-10-05 22:21:52,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:52 WrapperNode [2020-10-05 22:21:52,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-05 22:21:52,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-05 22:21:52,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-05 22:21:52,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-05 22:21:52,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:52" (1/1) ... [2020-10-05 22:21:52,758 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:52" (1/1) ... [2020-10-05 22:21:52,781 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-05 22:21:52,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-05 22:21:52,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-05 22:21:52,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-05 22:21:52,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:52" (1/1) ... [2020-10-05 22:21:52,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:52" (1/1) ... [2020-10-05 22:21:52,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:52" (1/1) ... [2020-10-05 22:21:52,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:52" (1/1) ... [2020-10-05 22:21:52,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:52" (1/1) ... [2020-10-05 22:21:52,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:52" (1/1) ... [2020-10-05 22:21:52,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:52" (1/1) ... [2020-10-05 22:21:52,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-05 22:21:52,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-05 22:21:52,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-05 22:21:52,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-05 22:21:52,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:52" (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 [2020-10-05 22:21:52,889 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-05 22:21:52,890 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-05 22:21:52,890 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-05 22:21:52,890 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-05 22:21:52,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-05 22:21:52,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-05 22:21:52,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-05 22:21:52,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-05 22:21:52,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-05 22:21:52,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-05 22:21:52,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-05 22:21:52,895 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-05 22:21:53,239 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-05 22:21:53,240 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-05 22:21:53,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:21:53 BoogieIcfgContainer [2020-10-05 22:21:53,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-05 22:21:53,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-05 22:21:53,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-05 22:21:53,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-05 22:21:53,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 10:21:52" (1/3) ... [2020-10-05 22:21:53,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57442df8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 10:21:53, skipping insertion in model container [2020-10-05 22:21:53,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:52" (2/3) ... [2020-10-05 22:21:53,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57442df8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 10:21:53, skipping insertion in model container [2020-10-05 22:21:53,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:21:53" (3/3) ... [2020-10-05 22:21:53,253 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-10-05 22:21:53,265 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-05 22:21:53,265 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-05 22:21:53,273 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-05 22:21:53,274 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-05 22:21:53,306 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,307 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,307 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,307 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,308 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,308 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,309 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,309 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,309 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,310 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,310 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,311 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,311 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,311 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,312 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,312 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,312 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,313 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,313 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,314 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,314 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,314 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,315 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,316 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,316 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,316 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,316 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,317 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,321 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,321 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,321 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,322 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,322 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,322 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,329 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,330 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,330 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,330 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,331 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,331 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:53,349 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-05 22:21:53,375 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 22:21:53,375 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 22:21:53,375 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-05 22:21:53,375 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-05 22:21:53,376 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 22:21:53,376 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 22:21:53,376 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 22:21:53,376 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 22:21:53,394 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-05 22:21:53,397 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-05 22:21:53,439 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-05 22:21:53,439 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-05 22:21:53,445 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-05 22:21:53,448 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-05 22:21:53,466 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-05 22:21:53,467 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-05 22:21:53,468 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-05 22:21:53,470 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-10-05 22:21:53,471 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-10-05 22:21:54,501 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-05 22:21:54,747 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-10-05 22:21:54,748 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-10-05 22:21:54,751 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-05 22:21:54,763 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-05 22:21:54,765 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-05 22:21:54,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-05 22:21:54,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:54,773 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-05 22:21:54,773 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:54,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:54,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-05 22:21:54,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:54,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539856881] [2020-10-05 22:21:54,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:54,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539856881] [2020-10-05 22:21:54,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:21:54,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 22:21:54,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778269872] [2020-10-05 22:21:54,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 22:21:54,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:55,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 22:21:55,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-05 22:21:55,017 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-05 22:21:55,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:55,096 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-05 22:21:55,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 22:21:55,098 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-05 22:21:55,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:55,111 INFO L225 Difference]: With dead ends: 75 [2020-10-05 22:21:55,111 INFO L226 Difference]: Without dead ends: 42 [2020-10-05 22:21:55,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-05 22:21:55,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-05 22:21:55,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-05 22:21:55,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 22:21:55,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-05 22:21:55,155 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-05 22:21:55,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:55,155 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-05 22:21:55,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 22:21:55,155 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-05 22:21:55,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-05 22:21:55,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:55,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:55,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-05 22:21:55,157 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:55,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:55,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-05 22:21:55,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:55,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116113987] [2020-10-05 22:21:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:55,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116113987] [2020-10-05 22:21:55,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:21:55,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 22:21:55,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188730962] [2020-10-05 22:21:55,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-05 22:21:55,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:55,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-05 22:21:55,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-05 22:21:55,268 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-05 22:21:55,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:55,302 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-05 22:21:55,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 22:21:55,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-05 22:21:55,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:55,304 INFO L225 Difference]: With dead ends: 56 [2020-10-05 22:21:55,304 INFO L226 Difference]: Without dead ends: 50 [2020-10-05 22:21:55,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:21:55,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-05 22:21:55,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-05 22:21:55,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 22:21:55,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-05 22:21:55,313 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-05 22:21:55,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:55,314 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-05 22:21:55,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-05 22:21:55,314 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-05 22:21:55,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:21:55,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:55,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:55,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-05 22:21:55,316 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:55,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:55,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-05 22:21:55,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:55,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513675247] [2020-10-05 22:21:55,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:55,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513675247] [2020-10-05 22:21:55,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:21:55,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 22:21:55,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779786364] [2020-10-05 22:21:55,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 22:21:55,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:55,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 22:21:55,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:21:55,416 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-05 22:21:55,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:55,508 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-05 22:21:55,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:21:55,509 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 22:21:55,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:55,511 INFO L225 Difference]: With dead ends: 78 [2020-10-05 22:21:55,511 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 22:21:55,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:21:55,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 22:21:55,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-05 22:21:55,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 22:21:55,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-05 22:21:55,520 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-05 22:21:55,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:55,521 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-05 22:21:55,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 22:21:55,521 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-05 22:21:55,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:21:55,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:55,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:55,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-05 22:21:55,523 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:55,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:55,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-05 22:21:55,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:55,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468103134] [2020-10-05 22:21:55,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:55,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468103134] [2020-10-05 22:21:55,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:21:55,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 22:21:55,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605825755] [2020-10-05 22:21:55,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 22:21:55,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:55,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 22:21:55,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:21:55,606 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-05 22:21:55,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:55,706 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-05 22:21:55,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 22:21:55,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 22:21:55,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:55,709 INFO L225 Difference]: With dead ends: 54 [2020-10-05 22:21:55,709 INFO L226 Difference]: Without dead ends: 43 [2020-10-05 22:21:55,709 INFO L675 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 [2020-10-05 22:21:55,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-05 22:21:55,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-05 22:21:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-05 22:21:55,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-05 22:21:55,715 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-05 22:21:55,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:55,715 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-05 22:21:55,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 22:21:55,715 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-05 22:21:55,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:21:55,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:55,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:55,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-05 22:21:55,717 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:55,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:55,717 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-05 22:21:55,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:55,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116487640] [2020-10-05 22:21:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:55,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116487640] [2020-10-05 22:21:55,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:21:55,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 22:21:55,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731296794] [2020-10-05 22:21:55,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 22:21:55,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:55,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 22:21:55,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:21:55,780 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-05 22:21:55,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:55,865 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-05 22:21:55,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 22:21:55,866 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 22:21:55,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:55,867 INFO L225 Difference]: With dead ends: 57 [2020-10-05 22:21:55,867 INFO L226 Difference]: Without dead ends: 51 [2020-10-05 22:21:55,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:21:55,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-05 22:21:55,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-05 22:21:55,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-05 22:21:55,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-05 22:21:55,873 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-05 22:21:55,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:55,874 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-05 22:21:55,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 22:21:55,874 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-05 22:21:55,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:21:55,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:55,875 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:55,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-05 22:21:55,876 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:55,876 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-05 22:21:55,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:55,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421004004] [2020-10-05 22:21:55,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:55,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421004004] [2020-10-05 22:21:55,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619251887] [2020-10-05 22:21:55,971 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 [2020-10-05 22:21:56,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:21:56,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:56,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:21:56,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:56,084 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:21:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:56,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:56,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-05 22:21:56,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508920421] [2020-10-05 22:21:56,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 22:21:56,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:56,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 22:21:56,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-05 22:21:56,106 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-05 22:21:56,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:56,268 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-05 22:21:56,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:21:56,269 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-05 22:21:56,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:56,270 INFO L225 Difference]: With dead ends: 48 [2020-10-05 22:21:56,270 INFO L226 Difference]: Without dead ends: 43 [2020-10-05 22:21:56,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:21:56,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-05 22:21:56,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-05 22:21:56,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-05 22:21:56,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-05 22:21:56,276 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-05 22:21:56,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:56,276 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-05 22:21:56,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 22:21:56,276 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-05 22:21:56,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:21:56,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:56,277 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:56,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-05 22:21:56,479 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:56,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:56,480 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-05 22:21:56,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:56,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438093607] [2020-10-05 22:21:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:56,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438093607] [2020-10-05 22:21:56,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968785306] [2020-10-05 22:21:56,559 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 [2020-10-05 22:21:56,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:21:56,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:56,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:21:56,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:56,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:56,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-05 22:21:56,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021404261] [2020-10-05 22:21:56,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-05 22:21:56,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:56,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-05 22:21:56,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-05 22:21:56,642 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-05 22:21:56,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:56,720 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-05 22:21:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:21:56,721 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-05 22:21:56,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:56,722 INFO L225 Difference]: With dead ends: 54 [2020-10-05 22:21:56,722 INFO L226 Difference]: Without dead ends: 48 [2020-10-05 22:21:56,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:21:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-05 22:21:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-05 22:21:56,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 22:21:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-05 22:21:56,728 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-05 22:21:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:56,728 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-05 22:21:56,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-05 22:21:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-05 22:21:56,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:21:56,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:56,730 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:56,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:56,942 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:56,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:56,943 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-05 22:21:56,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:56,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94445101] [2020-10-05 22:21:56,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:57,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94445101] [2020-10-05 22:21:57,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513335799] [2020-10-05 22:21:57,043 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 [2020-10-05 22:21:57,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:21:57,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:57,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:21:57,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:57,148 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:57,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:57,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-05 22:21:57,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414193775] [2020-10-05 22:21:57,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 22:21:57,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:57,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 22:21:57,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-05 22:21:57,177 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-05 22:21:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:57,321 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-05 22:21:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:21:57,322 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-05 22:21:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:57,323 INFO L225 Difference]: With dead ends: 58 [2020-10-05 22:21:57,323 INFO L226 Difference]: Without dead ends: 52 [2020-10-05 22:21:57,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:21:57,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-05 22:21:57,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-05 22:21:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-05 22:21:57,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-05 22:21:57,335 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-05 22:21:57,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:57,336 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-05 22:21:57,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 22:21:57,336 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-05 22:21:57,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:21:57,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:57,339 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:57,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:57,553 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:57,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:57,553 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-05 22:21:57,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:57,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722430253] [2020-10-05 22:21:57,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:57,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722430253] [2020-10-05 22:21:57,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376441717] [2020-10-05 22:21:57,612 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 [2020-10-05 22:21:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:57,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:21:57,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:57,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:57,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-05 22:21:57,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888798594] [2020-10-05 22:21:57,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-05 22:21:57,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:57,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-05 22:21:57,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-05 22:21:57,688 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-05 22:21:57,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:57,826 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-05 22:21:57,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:21:57,826 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-05 22:21:57,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:57,830 INFO L225 Difference]: With dead ends: 78 [2020-10-05 22:21:57,830 INFO L226 Difference]: Without dead ends: 72 [2020-10-05 22:21:57,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:21:57,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-05 22:21:57,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-05 22:21:57,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 22:21:57,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-05 22:21:57,839 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-05 22:21:57,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:57,839 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-05 22:21:57,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-05 22:21:57,839 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-05 22:21:57,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:21:57,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:57,840 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:58,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:58,052 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:58,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:58,053 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-05 22:21:58,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:58,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335848930] [2020-10-05 22:21:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:58,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335848930] [2020-10-05 22:21:58,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245900168] [2020-10-05 22:21:58,127 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 [2020-10-05 22:21:58,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:21:58,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:58,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:21:58,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:58,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:58,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:58,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-05 22:21:58,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997263857] [2020-10-05 22:21:58,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 22:21:58,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:58,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 22:21:58,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-05 22:21:58,231 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-05 22:21:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:58,440 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-05 22:21:58,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:21:58,441 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-05 22:21:58,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:58,442 INFO L225 Difference]: With dead ends: 62 [2020-10-05 22:21:58,442 INFO L226 Difference]: Without dead ends: 54 [2020-10-05 22:21:58,442 INFO L675 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 [2020-10-05 22:21:58,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-05 22:21:58,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-05 22:21:58,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-05 22:21:58,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-05 22:21:58,450 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-05 22:21:58,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:58,453 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-05 22:21:58,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 22:21:58,453 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-05 22:21:58,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:21:58,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:58,454 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:58,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-05 22:21:58,655 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:58,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:58,656 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-05 22:21:58,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:58,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221505535] [2020-10-05 22:21:58,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:58,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221505535] [2020-10-05 22:21:58,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124889129] [2020-10-05 22:21:58,740 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 [2020-10-05 22:21:58,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:21:58,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:58,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:21:58,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:58,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:58,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:58,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-05 22:21:58,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455848212] [2020-10-05 22:21:58,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 22:21:58,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:58,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 22:21:58,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-05 22:21:58,807 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-05 22:21:58,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:58,901 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-05 22:21:58,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:21:58,902 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-05 22:21:58,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:58,902 INFO L225 Difference]: With dead ends: 64 [2020-10-05 22:21:58,902 INFO L226 Difference]: Without dead ends: 58 [2020-10-05 22:21:58,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:21:58,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-05 22:21:58,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-05 22:21:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-05 22:21:58,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-05 22:21:58,907 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-05 22:21:58,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:58,908 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-05 22:21:58,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 22:21:58,908 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-05 22:21:58,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:21:58,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:58,909 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:59,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:59,119 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:59,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:59,120 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-05 22:21:59,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:59,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259468441] [2020-10-05 22:21:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:59,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259468441] [2020-10-05 22:21:59,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956599136] [2020-10-05 22:21:59,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 22:21:59,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:21:59,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:59,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:21:59,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:59,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:59,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:59,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-05 22:21:59,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721996282] [2020-10-05 22:21:59,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:21:59,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:59,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:21:59,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:21:59,350 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-05 22:21:59,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:59,526 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-05 22:21:59,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:21:59,526 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-05 22:21:59,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:59,527 INFO L225 Difference]: With dead ends: 61 [2020-10-05 22:21:59,528 INFO L226 Difference]: Without dead ends: 55 [2020-10-05 22:21:59,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:21:59,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-05 22:21:59,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-05 22:21:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-05 22:21:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-05 22:21:59,532 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-05 22:21:59,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:59,532 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-05 22:21:59,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:21:59,533 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-05 22:21:59,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:21:59,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:59,533 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:59,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:59,743 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:59,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:59,744 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-05 22:21:59,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:59,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336225176] [2020-10-05 22:21:59,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:59,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336225176] [2020-10-05 22:21:59,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681814205] [2020-10-05 22:21:59,804 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 [2020-10-05 22:21:59,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:21:59,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:59,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:21:59,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:59,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:59,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-05 22:21:59,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649730536] [2020-10-05 22:21:59,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 22:21:59,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:59,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 22:21:59,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-05 22:21:59,899 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-05 22:22:00,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:00,070 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-05 22:22:00,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:22:00,071 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-05 22:22:00,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:00,072 INFO L225 Difference]: With dead ends: 77 [2020-10-05 22:22:00,072 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 22:22:00,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:22:00,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 22:22:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-05 22:22:00,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-05 22:22:00,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-05 22:22:00,082 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-05 22:22:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:00,087 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-05 22:22:00,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 22:22:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-05 22:22:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:22:00,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:00,089 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:00,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-05 22:22:00,290 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:00,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:00,290 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-05 22:22:00,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:00,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375305784] [2020-10-05 22:22:00,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:00,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375305784] [2020-10-05 22:22:00,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118764928] [2020-10-05 22:22:00,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 22:22:00,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:22:00,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:00,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:22:00,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:00,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:00,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:00,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-05 22:22:00,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829303047] [2020-10-05 22:22:00,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:22:00,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:00,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:22:00,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:22:00,437 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-05 22:22:00,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:00,678 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-05 22:22:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:22:00,678 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-05 22:22:00,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:00,679 INFO L225 Difference]: With dead ends: 58 [2020-10-05 22:22:00,679 INFO L226 Difference]: Without dead ends: 50 [2020-10-05 22:22:00,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:22:00,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-05 22:22:00,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-05 22:22:00,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-05 22:22:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-05 22:22:00,684 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-05 22:22:00,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:00,684 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-05 22:22:00,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:22:00,685 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-05 22:22:00,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:22:00,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:00,686 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:00,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:00,887 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:00,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:00,889 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-05 22:22:00,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:00,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832765257] [2020-10-05 22:22:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:00,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832765257] [2020-10-05 22:22:00,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22071884] [2020-10-05 22:22:00,945 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 [2020-10-05 22:22:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:01,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:22:01,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:01,044 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:22:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:01,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:01,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-05 22:22:01,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881352411] [2020-10-05 22:22:01,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:22:01,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:01,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:22:01,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:22:01,056 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-05 22:22:01,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:01,249 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-05 22:22:01,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:22:01,250 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-05 22:22:01,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:01,251 INFO L225 Difference]: With dead ends: 60 [2020-10-05 22:22:01,251 INFO L226 Difference]: Without dead ends: 55 [2020-10-05 22:22:01,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:22:01,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-05 22:22:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-05 22:22:01,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 22:22:01,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-05 22:22:01,255 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-05 22:22:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:01,256 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-05 22:22:01,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:22:01,256 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-05 22:22:01,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:22:01,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:01,257 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:01,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-05 22:22:01,466 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:01,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:01,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-05 22:22:01,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:01,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830800197] [2020-10-05 22:22:01,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:01,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830800197] [2020-10-05 22:22:01,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683466216] [2020-10-05 22:22:01,544 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 [2020-10-05 22:22:01,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:01,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:01,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:22:01,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:01,612 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:22:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:01,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:01,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 22:22:01,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748911780] [2020-10-05 22:22:01,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:22:01,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:01,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:22:01,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:22:01,632 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-05 22:22:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:01,860 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-05 22:22:01,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:22:01,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 22:22:01,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:01,861 INFO L225 Difference]: With dead ends: 54 [2020-10-05 22:22:01,862 INFO L226 Difference]: Without dead ends: 49 [2020-10-05 22:22:01,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:22:01,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-05 22:22:01,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-05 22:22:01,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-05 22:22:01,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-05 22:22:01,866 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-05 22:22:01,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:01,867 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-05 22:22:01,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:22:01,867 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-05 22:22:01,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:22:01,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:01,867 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:02,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-05 22:22:02,079 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:02,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:02,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-05 22:22:02,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:02,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092802472] [2020-10-05 22:22:02,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:02,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092802472] [2020-10-05 22:22:02,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076368703] [2020-10-05 22:22:02,157 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 [2020-10-05 22:22:02,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:22:02,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:02,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:22:02,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:02,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:02,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-05 22:22:02,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120003294] [2020-10-05 22:22:02,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:22:02,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:02,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:22:02,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:22:02,245 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-05 22:22:02,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:02,340 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-05 22:22:02,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:22:02,341 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-05 22:22:02,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:02,342 INFO L225 Difference]: With dead ends: 60 [2020-10-05 22:22:02,342 INFO L226 Difference]: Without dead ends: 54 [2020-10-05 22:22:02,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:02,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-05 22:22:02,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-05 22:22:02,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 22:22:02,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-05 22:22:02,346 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-05 22:22:02,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:02,346 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-05 22:22:02,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:22:02,346 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-05 22:22:02,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:22:02,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:02,347 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:02,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-05 22:22:02,557 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:02,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:02,557 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-05 22:22:02,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:02,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36591126] [2020-10-05 22:22:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:02,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:02,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36591126] [2020-10-05 22:22:02,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623396041] [2020-10-05 22:22:02,628 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 [2020-10-05 22:22:02,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:02,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:02,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:22:02,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:02,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:02,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:02,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 22:22:02,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367342261] [2020-10-05 22:22:02,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:22:02,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:02,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:22:02,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:22:02,744 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-05 22:22:02,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:02,891 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-05 22:22:02,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:22:02,892 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 22:22:02,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:02,893 INFO L225 Difference]: With dead ends: 66 [2020-10-05 22:22:02,893 INFO L226 Difference]: Without dead ends: 60 [2020-10-05 22:22:02,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:22:02,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-05 22:22:02,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-05 22:22:02,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-05 22:22:02,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-05 22:22:02,896 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-05 22:22:02,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:02,896 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-05 22:22:02,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:22:02,897 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-05 22:22:02,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:22:02,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:02,897 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:03,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-05 22:22:03,108 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:03,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:03,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-05 22:22:03,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:03,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579327460] [2020-10-05 22:22:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:03,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579327460] [2020-10-05 22:22:03,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382426802] [2020-10-05 22:22:03,177 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 [2020-10-05 22:22:03,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:22:03,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:03,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:22:03,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:03,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:03,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-05 22:22:03,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965117856] [2020-10-05 22:22:03,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:22:03,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:03,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:22:03,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:22:03,267 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-05 22:22:03,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:03,459 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-05 22:22:03,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:22:03,460 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-05 22:22:03,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:03,461 INFO L225 Difference]: With dead ends: 67 [2020-10-05 22:22:03,461 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 22:22:03,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:22:03,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 22:22:03,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-05 22:22:03,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-05 22:22:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-05 22:22:03,465 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-05 22:22:03,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:03,465 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-05 22:22:03,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:22:03,466 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-05 22:22:03,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:22:03,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:03,466 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:03,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:03,677 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:03,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:03,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-05 22:22:03,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:03,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657151933] [2020-10-05 22:22:03,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:03,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657151933] [2020-10-05 22:22:03,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967619259] [2020-10-05 22:22:03,760 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 [2020-10-05 22:22:03,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:22:03,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:03,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:22:03,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:03,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:03,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:03,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 22:22:03,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159549102] [2020-10-05 22:22:03,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:22:03,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:03,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:22:03,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:22:03,867 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-05 22:22:04,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:04,090 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-05 22:22:04,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:22:04,091 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 22:22:04,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:04,092 INFO L225 Difference]: With dead ends: 69 [2020-10-05 22:22:04,092 INFO L226 Difference]: Without dead ends: 63 [2020-10-05 22:22:04,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:22:04,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-05 22:22:04,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-05 22:22:04,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 22:22:04,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-05 22:22:04,095 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-05 22:22:04,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:04,096 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-05 22:22:04,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:22:04,098 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-05 22:22:04,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:22:04,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:04,098 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:04,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:04,299 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:04,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:04,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-05 22:22:04,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:04,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130611893] [2020-10-05 22:22:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:04,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:04,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130611893] [2020-10-05 22:22:04,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593331551] [2020-10-05 22:22:04,360 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 [2020-10-05 22:22:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:04,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:22:04,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:04,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:04,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-05 22:22:04,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948298408] [2020-10-05 22:22:04,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:22:04,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:04,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:22:04,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:22:04,424 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-05 22:22:04,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:04,639 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-05 22:22:04,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:22:04,643 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-05 22:22:04,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:04,644 INFO L225 Difference]: With dead ends: 88 [2020-10-05 22:22:04,644 INFO L226 Difference]: Without dead ends: 82 [2020-10-05 22:22:04,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:22:04,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-05 22:22:04,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-05 22:22:04,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 22:22:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-05 22:22:04,651 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-05 22:22:04,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:04,652 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-05 22:22:04,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:22:04,652 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-05 22:22:04,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:22:04,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:04,652 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:04,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:04,853 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:04,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:04,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-05 22:22:04,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:04,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668677265] [2020-10-05 22:22:04,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:04,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668677265] [2020-10-05 22:22:04,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679337323] [2020-10-05 22:22:04,912 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 [2020-10-05 22:22:04,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:04,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:04,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:04,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:04,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:04,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 22:22:04,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651751326] [2020-10-05 22:22:04,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:22:04,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:04,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:22:04,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:22:04,991 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-05 22:22:05,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:05,260 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-05 22:22:05,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:22:05,261 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 22:22:05,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:05,262 INFO L225 Difference]: With dead ends: 69 [2020-10-05 22:22:05,262 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 22:22:05,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:22:05,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 22:22:05,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-05 22:22:05,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-05 22:22:05,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-05 22:22:05,267 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-05 22:22:05,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:05,267 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-05 22:22:05,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:22:05,267 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-05 22:22:05,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:05,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:05,271 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:05,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-05 22:22:05,483 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:05,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:05,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-05 22:22:05,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:05,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362311211] [2020-10-05 22:22:05,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:05,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362311211] [2020-10-05 22:22:05,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133646566] [2020-10-05 22:22:05,570 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 [2020-10-05 22:22:05,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:22:05,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:05,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:05,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:05,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:05,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-05 22:22:05,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24051466] [2020-10-05 22:22:05,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:22:05,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:05,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:22:05,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:22:05,650 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-05 22:22:05,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:05,804 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-05 22:22:05,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:22:05,805 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-05 22:22:05,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:05,806 INFO L225 Difference]: With dead ends: 74 [2020-10-05 22:22:05,806 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 22:22:05,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:22:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 22:22:05,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-05 22:22:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-05 22:22:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-05 22:22:05,810 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-05 22:22:05,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:05,810 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-05 22:22:05,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:22:05,810 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-05 22:22:05,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:05,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:05,811 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:06,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-05 22:22:06,020 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:06,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:06,020 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-05 22:22:06,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:06,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072692200] [2020-10-05 22:22:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:06,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072692200] [2020-10-05 22:22:06,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841429159] [2020-10-05 22:22:06,100 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 [2020-10-05 22:22:06,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:06,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:06,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:06,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:06,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:06,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:06,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 22:22:06,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27121518] [2020-10-05 22:22:06,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:06,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:06,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:06,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:06,193 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-05 22:22:06,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:06,377 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-05 22:22:06,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:22:06,377 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 22:22:06,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:06,378 INFO L225 Difference]: With dead ends: 71 [2020-10-05 22:22:06,378 INFO L226 Difference]: Without dead ends: 65 [2020-10-05 22:22:06,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:22:06,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-05 22:22:06,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-05 22:22:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 22:22:06,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-05 22:22:06,381 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-05 22:22:06,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:06,382 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-05 22:22:06,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:06,382 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-05 22:22:06,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:06,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:06,383 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:06,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-05 22:22:06,593 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:06,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:06,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-05 22:22:06,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:06,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829466452] [2020-10-05 22:22:06,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:06,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829466452] [2020-10-05 22:22:06,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897565115] [2020-10-05 22:22:06,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 22:22:06,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:22:06,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:06,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:06,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:06,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:06,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-05 22:22:06,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995067126] [2020-10-05 22:22:06,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:22:06,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:06,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:22:06,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:22:06,756 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-05 22:22:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:06,941 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-05 22:22:06,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:22:06,944 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-05 22:22:06,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:06,945 INFO L225 Difference]: With dead ends: 68 [2020-10-05 22:22:06,945 INFO L226 Difference]: Without dead ends: 62 [2020-10-05 22:22:06,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:22:06,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-05 22:22:06,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-05 22:22:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-05 22:22:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-05 22:22:06,949 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-05 22:22:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:06,949 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-05 22:22:06,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:22:06,949 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-05 22:22:06,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:06,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:06,950 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:07,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-05 22:22:07,160 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:07,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:07,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-05 22:22:07,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:07,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784198930] [2020-10-05 22:22:07,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:07,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784198930] [2020-10-05 22:22:07,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263933406] [2020-10-05 22:22:07,235 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 [2020-10-05 22:22:07,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:22:07,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:07,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:07,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:07,303 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:07,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:07,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 22:22:07,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880573049] [2020-10-05 22:22:07,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:07,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:07,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:07,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:07,317 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-05 22:22:07,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:07,629 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-05 22:22:07,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:22:07,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 22:22:07,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:07,630 INFO L225 Difference]: With dead ends: 67 [2020-10-05 22:22:07,631 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 22:22:07,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:22:07,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 22:22:07,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-05 22:22:07,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 22:22:07,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-05 22:22:07,634 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-05 22:22:07,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:07,634 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-05 22:22:07,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:07,634 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-05 22:22:07,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:07,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:07,635 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:07,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-05 22:22:07,842 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:07,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:07,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-05 22:22:07,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:07,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254323586] [2020-10-05 22:22:07,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:07,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254323586] [2020-10-05 22:22:07,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42846958] [2020-10-05 22:22:07,916 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 [2020-10-05 22:22:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:07,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:07,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:07,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:07,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-05 22:22:07,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899609176] [2020-10-05 22:22:07,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:22:07,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:07,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:22:07,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:22:07,991 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-05 22:22:08,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:08,234 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-05 22:22:08,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:22:08,237 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-05 22:22:08,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:08,237 INFO L225 Difference]: With dead ends: 83 [2020-10-05 22:22:08,238 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 22:22:08,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:22:08,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 22:22:08,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-05 22:22:08,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 22:22:08,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-05 22:22:08,241 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-05 22:22:08,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:08,241 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-05 22:22:08,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:22:08,242 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-05 22:22:08,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:08,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:08,242 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:08,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:08,443 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:08,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:08,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-05 22:22:08,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:08,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531341645] [2020-10-05 22:22:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:08,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531341645] [2020-10-05 22:22:08,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204554254] [2020-10-05 22:22:08,509 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 [2020-10-05 22:22:08,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:08,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:08,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:08,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:08,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:08,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:08,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 22:22:08,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047513047] [2020-10-05 22:22:08,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:08,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:08,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:08,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:08,610 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-05 22:22:08,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:08,938 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-05 22:22:08,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:22:08,938 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 22:22:08,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:08,939 INFO L225 Difference]: With dead ends: 64 [2020-10-05 22:22:08,939 INFO L226 Difference]: Without dead ends: 56 [2020-10-05 22:22:08,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:22:08,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-05 22:22:08,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-10-05 22:22:08,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-05 22:22:08,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-05 22:22:08,942 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-05 22:22:08,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:08,943 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-05 22:22:08,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:08,944 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-05 22:22:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:08,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:08,944 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:09,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-05 22:22:09,154 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:09,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:09,154 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-05 22:22:09,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:09,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590946749] [2020-10-05 22:22:09,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:09,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590946749] [2020-10-05 22:22:09,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523136937] [2020-10-05 22:22:09,215 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 [2020-10-05 22:22:09,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:22:09,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:09,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:09,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:09,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:22:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:09,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:09,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 22:22:09,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175710006] [2020-10-05 22:22:09,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:09,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:09,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:09,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:09,299 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-05 22:22:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:09,620 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-05 22:22:09,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:22:09,621 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 22:22:09,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:09,622 INFO L225 Difference]: With dead ends: 68 [2020-10-05 22:22:09,622 INFO L226 Difference]: Without dead ends: 63 [2020-10-05 22:22:09,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:22:09,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-05 22:22:09,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-05 22:22:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 22:22:09,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-05 22:22:09,625 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-05 22:22:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:09,625 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-05 22:22:09,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-05 22:22:09,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:09,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:09,626 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:09,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-05 22:22:09,836 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:09,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:09,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-05 22:22:09,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:09,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459205257] [2020-10-05 22:22:09,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:09,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459205257] [2020-10-05 22:22:09,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141535863] [2020-10-05 22:22:09,917 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 [2020-10-05 22:22:09,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:09,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:09,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:09,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:09,988 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:22:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:10,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:10,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 22:22:10,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33299697] [2020-10-05 22:22:10,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:10,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:10,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:10,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:10,005 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-05 22:22:10,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:10,330 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-05 22:22:10,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:22:10,336 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 22:22:10,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:10,337 INFO L225 Difference]: With dead ends: 60 [2020-10-05 22:22:10,337 INFO L226 Difference]: Without dead ends: 55 [2020-10-05 22:22:10,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:22:10,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-05 22:22:10,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-05 22:22:10,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 22:22:10,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-05 22:22:10,341 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-05 22:22:10,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:10,341 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-05 22:22:10,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:10,342 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-05 22:22:10,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:10,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:10,342 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:10,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:10,547 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:10,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:10,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-05 22:22:10,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:10,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653507657] [2020-10-05 22:22:10,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:10,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653507657] [2020-10-05 22:22:10,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150702591] [2020-10-05 22:22:10,644 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 [2020-10-05 22:22:10,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-05 22:22:10,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:10,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:10,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:10,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:10,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 22:22:10,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420444036] [2020-10-05 22:22:10,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:10,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:10,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:10,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:10,710 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-05 22:22:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:10,855 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-05 22:22:10,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:22:10,856 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 22:22:10,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:10,857 INFO L225 Difference]: With dead ends: 66 [2020-10-05 22:22:10,857 INFO L226 Difference]: Without dead ends: 60 [2020-10-05 22:22:10,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:22:10,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-05 22:22:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-05 22:22:10,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 22:22:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-05 22:22:10,860 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-05 22:22:10,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:10,860 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-05 22:22:10,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:10,861 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-05 22:22:10,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:10,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:10,861 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:11,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:11,069 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:11,069 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-05 22:22:11,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:11,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967528575] [2020-10-05 22:22:11,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:11,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967528575] [2020-10-05 22:22:11,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36461895] [2020-10-05 22:22:11,175 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 [2020-10-05 22:22:11,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-05 22:22:11,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:11,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:11,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:11,255 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:11,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:11,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 22:22:11,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416773980] [2020-10-05 22:22:11,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:11,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:11,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:11,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:11,273 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-05 22:22:11,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:11,462 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-05 22:22:11,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:22:11,463 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 22:22:11,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:11,463 INFO L225 Difference]: With dead ends: 74 [2020-10-05 22:22:11,463 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 22:22:11,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:22:11,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 22:22:11,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-05 22:22:11,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-05 22:22:11,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-05 22:22:11,466 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-05 22:22:11,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:11,466 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-05 22:22:11,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:11,466 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-05 22:22:11,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:11,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:11,467 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:11,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-05 22:22:11,668 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:11,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:11,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-05 22:22:11,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:11,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726930140] [2020-10-05 22:22:11,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:11,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726930140] [2020-10-05 22:22:11,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055192857] [2020-10-05 22:22:11,752 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 [2020-10-05 22:22:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:11,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:11,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:11,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:11,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 22:22:11,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111164228] [2020-10-05 22:22:11,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:11,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:11,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:11,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:11,824 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-05 22:22:12,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:12,076 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-05 22:22:12,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:22:12,077 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 22:22:12,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:12,078 INFO L225 Difference]: With dead ends: 75 [2020-10-05 22:22:12,078 INFO L226 Difference]: Without dead ends: 69 [2020-10-05 22:22:12,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:22:12,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-05 22:22:12,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-05 22:22:12,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-05 22:22:12,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-05 22:22:12,082 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-05 22:22:12,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:12,082 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-05 22:22:12,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:12,082 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-05 22:22:12,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:12,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:12,083 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:12,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:12,283 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:12,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:12,284 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-05 22:22:12,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:12,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170759598] [2020-10-05 22:22:12,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:12,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170759598] [2020-10-05 22:22:12,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174550038] [2020-10-05 22:22:12,376 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 [2020-10-05 22:22:12,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:12,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:12,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:12,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:12,453 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:12,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:12,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 22:22:12,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051456028] [2020-10-05 22:22:12,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:12,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:12,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:12,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:12,472 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-05 22:22:12,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:12,750 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-05 22:22:12,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:22:12,750 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 22:22:12,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:12,751 INFO L225 Difference]: With dead ends: 79 [2020-10-05 22:22:12,751 INFO L226 Difference]: Without dead ends: 73 [2020-10-05 22:22:12,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:22:12,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-05 22:22:12,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-05 22:22:12,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 22:22:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-05 22:22:12,754 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-05 22:22:12,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:12,754 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-05 22:22:12,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:12,755 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-05 22:22:12,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:12,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:12,755 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:12,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-05 22:22:12,956 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:12,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:12,957 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-05 22:22:12,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:12,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400989126] [2020-10-05 22:22:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:13,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400989126] [2020-10-05 22:22:13,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545358183] [2020-10-05 22:22:13,057 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 [2020-10-05 22:22:13,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 22:22:13,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:13,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:13,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:13,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:13,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 22:22:13,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321487025] [2020-10-05 22:22:13,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:13,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:13,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:13,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:13,202 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-05 22:22:13,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:13,477 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-05 22:22:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:22:13,478 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 22:22:13,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:13,478 INFO L225 Difference]: With dead ends: 79 [2020-10-05 22:22:13,479 INFO L226 Difference]: Without dead ends: 73 [2020-10-05 22:22:13,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:22:13,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-05 22:22:13,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-05 22:22:13,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-05 22:22:13,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-05 22:22:13,482 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-05 22:22:13,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:13,482 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-05 22:22:13,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:13,482 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-05 22:22:13,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:13,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:13,483 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:13,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:13,690 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:13,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:13,691 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-05 22:22:13,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:13,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492503037] [2020-10-05 22:22:13,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:13,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492503037] [2020-10-05 22:22:13,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542763191] [2020-10-05 22:22:13,831 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 [2020-10-05 22:22:13,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:13,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:13,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:13,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:13,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:13,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:13,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 22:22:13,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839072389] [2020-10-05 22:22:13,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:13,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:13,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:13,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:13,956 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-05 22:22:14,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:14,463 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-05 22:22:14,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:22:14,464 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 22:22:14,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:14,465 INFO L225 Difference]: With dead ends: 76 [2020-10-05 22:22:14,465 INFO L226 Difference]: Without dead ends: 70 [2020-10-05 22:22:14,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:22:14,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-05 22:22:14,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-05 22:22:14,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 22:22:14,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-05 22:22:14,469 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-05 22:22:14,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:14,470 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-05 22:22:14,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:14,470 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-05 22:22:14,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:14,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:14,471 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:14,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-05 22:22:14,681 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:14,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:14,682 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-05 22:22:14,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:14,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462169270] [2020-10-05 22:22:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:14,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462169270] [2020-10-05 22:22:14,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727707925] [2020-10-05 22:22:14,758 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 [2020-10-05 22:22:14,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-05 22:22:14,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:14,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:14,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:14,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:14,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 22:22:14,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785223736] [2020-10-05 22:22:14,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:14,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:14,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:14,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:14,826 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-05 22:22:15,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:15,153 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-05 22:22:15,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:22:15,153 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 22:22:15,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:15,154 INFO L225 Difference]: With dead ends: 96 [2020-10-05 22:22:15,154 INFO L226 Difference]: Without dead ends: 90 [2020-10-05 22:22:15,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-05 22:22:15,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-05 22:22:15,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-05 22:22:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 22:22:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-05 22:22:15,158 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-05 22:22:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:15,158 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-05 22:22:15,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:15,159 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-05 22:22:15,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:15,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:15,159 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:15,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-05 22:22:15,368 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:15,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:15,369 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-05 22:22:15,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:15,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750424310] [2020-10-05 22:22:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:15,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750424310] [2020-10-05 22:22:15,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764384528] [2020-10-05 22:22:15,469 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 [2020-10-05 22:22:15,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-05 22:22:15,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:15,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:15,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:15,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:15,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 22:22:15,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695019924] [2020-10-05 22:22:15,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:15,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:15,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:15,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:15,601 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-05 22:22:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:16,124 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-05 22:22:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:22:16,125 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 22:22:16,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:16,126 INFO L225 Difference]: With dead ends: 77 [2020-10-05 22:22:16,126 INFO L226 Difference]: Without dead ends: 69 [2020-10-05 22:22:16,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:22:16,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-05 22:22:16,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-05 22:22:16,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-05 22:22:16,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-05 22:22:16,130 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-05 22:22:16,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:16,130 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-05 22:22:16,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:16,130 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-05 22:22:16,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:16,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:16,131 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:16,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-05 22:22:16,341 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:16,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:16,342 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-05 22:22:16,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:16,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024512818] [2020-10-05 22:22:16,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:16,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024512818] [2020-10-05 22:22:16,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721655110] [2020-10-05 22:22:16,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 22:22:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:16,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:16,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:16,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:16,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 22:22:16,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817807288] [2020-10-05 22:22:16,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:16,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:16,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:16,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:16,523 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-05 22:22:16,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:16,752 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-05 22:22:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:22:16,753 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 22:22:16,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:16,753 INFO L225 Difference]: With dead ends: 84 [2020-10-05 22:22:16,754 INFO L226 Difference]: Without dead ends: 78 [2020-10-05 22:22:16,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:22:16,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-05 22:22:16,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-05 22:22:16,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 22:22:16,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 22:22:16,757 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-05 22:22:16,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:16,757 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 22:22:16,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:16,758 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 22:22:16,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:16,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:16,759 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:16,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-05 22:22:16,969 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:16,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:16,970 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-05 22:22:16,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:16,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528252859] [2020-10-05 22:22:16,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:17,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528252859] [2020-10-05 22:22:17,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947252764] [2020-10-05 22:22:17,103 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 [2020-10-05 22:22:17,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:17,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:17,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:17,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:17,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:17,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:17,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 22:22:17,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446939791] [2020-10-05 22:22:17,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:17,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:17,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:17,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:17,188 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-05 22:22:17,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:17,454 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-05 22:22:17,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:22:17,454 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 22:22:17,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:17,455 INFO L225 Difference]: With dead ends: 81 [2020-10-05 22:22:17,455 INFO L226 Difference]: Without dead ends: 75 [2020-10-05 22:22:17,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:22:17,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-05 22:22:17,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-05 22:22:17,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 22:22:17,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 22:22:17,458 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-05 22:22:17,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:17,458 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 22:22:17,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:17,458 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 22:22:17,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:17,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:17,459 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:17,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-05 22:22:17,667 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:17,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:17,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-05 22:22:17,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:17,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974588925] [2020-10-05 22:22:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:17,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974588925] [2020-10-05 22:22:17,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798733436] [2020-10-05 22:22:17,759 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 [2020-10-05 22:22:17,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 22:22:17,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:17,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:17,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:17,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:17,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 22:22:17,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542712843] [2020-10-05 22:22:17,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:17,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:17,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:17,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:17,857 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-05 22:22:18,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:18,065 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-05 22:22:18,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:22:18,065 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 22:22:18,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:18,066 INFO L225 Difference]: With dead ends: 78 [2020-10-05 22:22:18,066 INFO L226 Difference]: Without dead ends: 72 [2020-10-05 22:22:18,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:22:18,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-05 22:22:18,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-05 22:22:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 22:22:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 22:22:18,069 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-05 22:22:18,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:18,070 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 22:22:18,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 22:22:18,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:18,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:18,071 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:18,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-05 22:22:18,279 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:18,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:18,280 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-05 22:22:18,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:18,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076988753] [2020-10-05 22:22:18,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:18,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076988753] [2020-10-05 22:22:18,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830066199] [2020-10-05 22:22:18,427 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 [2020-10-05 22:22:18,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:18,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:18,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:18,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:18,534 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:18,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:18,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 22:22:18,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929521331] [2020-10-05 22:22:18,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:18,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:18,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:18,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:18,554 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-05 22:22:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:19,005 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-05 22:22:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:22:19,005 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 22:22:19,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:19,006 INFO L225 Difference]: With dead ends: 77 [2020-10-05 22:22:19,006 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 22:22:19,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-05 22:22:19,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 22:22:19,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-05 22:22:19,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 22:22:19,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 22:22:19,010 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-05 22:22:19,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:19,010 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 22:22:19,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:19,010 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 22:22:19,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:19,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:19,011 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:19,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-05 22:22:19,218 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:19,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:19,219 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-05 22:22:19,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:19,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262289453] [2020-10-05 22:22:19,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:19,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262289453] [2020-10-05 22:22:19,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103349076] [2020-10-05 22:22:19,307 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 [2020-10-05 22:22:19,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-05 22:22:19,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:19,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:19,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:19,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:19,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 22:22:19,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437814482] [2020-10-05 22:22:19,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:19,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:19,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:19,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:19,422 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-05 22:22:19,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:19,770 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-05 22:22:19,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:22:19,771 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 22:22:19,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:19,772 INFO L225 Difference]: With dead ends: 74 [2020-10-05 22:22:19,772 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 22:22:19,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:22:19,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 22:22:19,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-05 22:22:19,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 22:22:19,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 22:22:19,776 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-05 22:22:19,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:19,776 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 22:22:19,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:19,776 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 22:22:19,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:19,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:19,777 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:19,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:19,977 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:19,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:19,978 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-05 22:22:19,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:19,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313306806] [2020-10-05 22:22:19,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:20,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313306806] [2020-10-05 22:22:20,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023440271] [2020-10-05 22:22:20,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 22:22:20,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-05 22:22:20,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:20,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:20,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:20,143 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:20,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:20,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 22:22:20,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099480095] [2020-10-05 22:22:20,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:20,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:20,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:20,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:20,156 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-05 22:22:20,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:20,577 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-05 22:22:20,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:22:20,578 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 22:22:20,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:20,579 INFO L225 Difference]: With dead ends: 73 [2020-10-05 22:22:20,579 INFO L226 Difference]: Without dead ends: 67 [2020-10-05 22:22:20,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:22:20,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-05 22:22:20,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-05 22:22:20,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 22:22:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 22:22:20,583 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-05 22:22:20,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:20,583 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 22:22:20,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 22:22:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:20,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:20,584 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:20,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-05 22:22:20,786 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:20,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:20,787 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-05 22:22:20,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:20,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722367825] [2020-10-05 22:22:20,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:20,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722367825] [2020-10-05 22:22:20,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173814011] [2020-10-05 22:22:20,866 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 [2020-10-05 22:22:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:20,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:20,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:20,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:20,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 22:22:20,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557441948] [2020-10-05 22:22:20,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:20,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:20,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:20,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:20,940 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-05 22:22:21,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:21,282 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-05 22:22:21,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:22:21,283 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 22:22:21,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:21,283 INFO L225 Difference]: With dead ends: 89 [2020-10-05 22:22:21,283 INFO L226 Difference]: Without dead ends: 83 [2020-10-05 22:22:21,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:22:21,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-05 22:22:21,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-05 22:22:21,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-05 22:22:21,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-05 22:22:21,286 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-05 22:22:21,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:21,286 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-05 22:22:21,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:21,286 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-05 22:22:21,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:21,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:21,287 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:21,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:21,495 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:21,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:21,496 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-05 22:22:21,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:21,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777107986] [2020-10-05 22:22:21,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:21,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777107986] [2020-10-05 22:22:21,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527164079] [2020-10-05 22:22:21,628 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 [2020-10-05 22:22:21,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:21,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:21,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:21,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:21,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:21,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 22:22:21,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586208426] [2020-10-05 22:22:21,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:21,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:21,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:21,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:21,765 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-05 22:22:22,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:22,174 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-10-05 22:22:22,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:22:22,175 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 22:22:22,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:22,176 INFO L225 Difference]: With dead ends: 68 [2020-10-05 22:22:22,176 INFO L226 Difference]: Without dead ends: 60 [2020-10-05 22:22:22,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:22:22,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-05 22:22:22,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-10-05 22:22:22,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-05 22:22:22,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-05 22:22:22,182 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-05 22:22:22,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:22,182 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-05 22:22:22,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-05 22:22:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:22,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:22,183 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:22,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-05 22:22:22,394 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:22,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:22,394 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-05 22:22:22,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:22,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420501454] [2020-10-05 22:22:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:22,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420501454] [2020-10-05 22:22:22,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61374605] [2020-10-05 22:22:22,470 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 [2020-10-05 22:22:22,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 22:22:22,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:22,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:22,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:22,541 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:22:22,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:22,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:22,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 22:22:22,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550673418] [2020-10-05 22:22:22,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:22,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:22,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:22,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:22,558 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-05 22:22:22,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:22,987 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-05 22:22:22,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:22:22,988 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 22:22:22,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:22,988 INFO L225 Difference]: With dead ends: 76 [2020-10-05 22:22:22,989 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 22:22:22,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-05 22:22:22,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 22:22:22,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-05 22:22:22,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 22:22:22,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-05 22:22:22,992 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-05 22:22:22,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:22,992 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-05 22:22:22,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:22,992 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-05 22:22:22,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:22,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:22,993 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:23,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:23,200 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:23,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:23,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-05 22:22:23,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:23,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482286558] [2020-10-05 22:22:23,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:23,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482286558] [2020-10-05 22:22:23,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637796730] [2020-10-05 22:22:23,290 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 [2020-10-05 22:22:23,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:23,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:23,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:23,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:23,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:22:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:23,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:23,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 22:22:23,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301252275] [2020-10-05 22:22:23,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:23,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:23,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:23,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:23,399 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-05 22:22:23,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:23,820 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-05 22:22:23,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:22:23,821 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 22:22:23,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:23,822 INFO L225 Difference]: With dead ends: 66 [2020-10-05 22:22:23,822 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 22:22:23,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-05 22:22:23,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 22:22:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-05 22:22:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 22:22:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-05 22:22:23,826 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-05 22:22:23,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:23,826 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-05 22:22:23,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:23,826 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-05 22:22:23,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:23,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:23,827 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:24,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-05 22:22:24,037 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:24,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:24,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-05 22:22:24,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:24,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563867761] [2020-10-05 22:22:24,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:24,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563867761] [2020-10-05 22:22:24,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236267652] [2020-10-05 22:22:24,156 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 [2020-10-05 22:22:24,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-05 22:22:24,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:24,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:24,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:24,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:24,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 22:22:24,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886885978] [2020-10-05 22:22:24,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:24,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:24,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:24,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:24,232 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-05 22:22:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:24,442 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-05 22:22:24,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:22:24,442 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 22:22:24,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:24,443 INFO L225 Difference]: With dead ends: 72 [2020-10-05 22:22:24,443 INFO L226 Difference]: Without dead ends: 66 [2020-10-05 22:22:24,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:22:24,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-05 22:22:24,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-05 22:22:24,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 22:22:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-05 22:22:24,447 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-05 22:22:24,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:24,447 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-05 22:22:24,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-05 22:22:24,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:24,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:24,448 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:24,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-05 22:22:24,658 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:24,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:24,658 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-05 22:22:24,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:24,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147263948] [2020-10-05 22:22:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:24,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147263948] [2020-10-05 22:22:24,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348152633] [2020-10-05 22:22:24,775 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 [2020-10-05 22:22:24,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-05 22:22:24,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:24,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:24,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:24,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:24,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:24,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 22:22:24,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862915122] [2020-10-05 22:22:24,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:24,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:24,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:24,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:24,895 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-05 22:22:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:25,105 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-05 22:22:25,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:22:25,105 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 22:22:25,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:25,106 INFO L225 Difference]: With dead ends: 82 [2020-10-05 22:22:25,106 INFO L226 Difference]: Without dead ends: 76 [2020-10-05 22:22:25,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:22:25,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-05 22:22:25,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-05 22:22:25,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 22:22:25,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-05 22:22:25,109 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-05 22:22:25,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:25,109 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-05 22:22:25,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:25,109 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-05 22:22:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:25,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:25,111 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:25,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-05 22:22:25,319 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:25,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:25,319 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-05 22:22:25,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:25,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804186063] [2020-10-05 22:22:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:25,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804186063] [2020-10-05 22:22:25,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537767730] [2020-10-05 22:22:25,422 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 [2020-10-05 22:22:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:25,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:25,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:25,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:25,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 22:22:25,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583315663] [2020-10-05 22:22:25,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:25,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:25,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:25,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:25,497 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-05 22:22:25,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:25,781 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-05 22:22:25,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:22:25,782 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 22:22:25,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:25,783 INFO L225 Difference]: With dead ends: 83 [2020-10-05 22:22:25,784 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 22:22:25,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:22:25,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 22:22:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-05 22:22:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-05 22:22:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-05 22:22:25,787 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-05 22:22:25,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:25,787 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-05 22:22:25,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:25,787 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-05 22:22:25,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:25,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:25,788 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:25,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-05 22:22:25,997 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:25,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:25,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-05 22:22:25,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:25,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419394703] [2020-10-05 22:22:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:26,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419394703] [2020-10-05 22:22:26,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966652433] [2020-10-05 22:22:26,105 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 [2020-10-05 22:22:26,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:26,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:26,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:26,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:26,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:26,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:26,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 22:22:26,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844794629] [2020-10-05 22:22:26,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:26,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:26,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:26,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:26,251 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-05 22:22:26,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:26,659 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-05 22:22:26,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:22:26,666 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 22:22:26,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:26,667 INFO L225 Difference]: With dead ends: 89 [2020-10-05 22:22:26,667 INFO L226 Difference]: Without dead ends: 83 [2020-10-05 22:22:26,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:22:26,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-05 22:22:26,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-05 22:22:26,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 22:22:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-05 22:22:26,672 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-05 22:22:26,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:26,672 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-05 22:22:26,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:26,673 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-05 22:22:26,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:26,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:26,674 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:26,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:26,885 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:26,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-05 22:22:26,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:26,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830809177] [2020-10-05 22:22:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:27,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830809177] [2020-10-05 22:22:27,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379644570] [2020-10-05 22:22:27,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:27,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-05 22:22:27,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:27,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:27,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:27,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:27,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 22:22:27,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082610595] [2020-10-05 22:22:27,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:27,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:27,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:27,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:27,137 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-05 22:22:27,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:27,472 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-05 22:22:27,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:22:27,473 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 22:22:27,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:27,474 INFO L225 Difference]: With dead ends: 89 [2020-10-05 22:22:27,474 INFO L226 Difference]: Without dead ends: 83 [2020-10-05 22:22:27,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:22:27,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-05 22:22:27,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-05 22:22:27,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 22:22:27,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 22:22:27,478 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-05 22:22:27,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:27,478 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 22:22:27,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:27,479 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 22:22:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:27,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:27,479 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:27,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:27,680 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:27,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:27,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-05 22:22:27,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:27,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013280811] [2020-10-05 22:22:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:27,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013280811] [2020-10-05 22:22:27,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446501792] [2020-10-05 22:22:27,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:27,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:27,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:27,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:27,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:27,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:27,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:27,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 22:22:27,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502910789] [2020-10-05 22:22:27,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:27,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:27,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:27,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:27,873 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-05 22:22:28,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:28,284 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-05 22:22:28,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:22:28,284 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 22:22:28,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:28,285 INFO L225 Difference]: With dead ends: 86 [2020-10-05 22:22:28,285 INFO L226 Difference]: Without dead ends: 80 [2020-10-05 22:22:28,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-05 22:22:28,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-05 22:22:28,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-05 22:22:28,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 22:22:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 22:22:28,288 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-05 22:22:28,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:28,288 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 22:22:28,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:28,288 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 22:22:28,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:28,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:28,289 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:28,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-05 22:22:28,495 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:28,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:28,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-05 22:22:28,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:28,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691078508] [2020-10-05 22:22:28,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:28,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691078508] [2020-10-05 22:22:28,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469693167] [2020-10-05 22:22:28,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:28,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-05 22:22:28,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:28,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:28,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:28,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:28,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 22:22:28,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525684998] [2020-10-05 22:22:28,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:28,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:28,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:28,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:28,666 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-05 22:22:29,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:29,051 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-05 22:22:29,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 22:22:29,052 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 22:22:29,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:29,053 INFO L225 Difference]: With dead ends: 87 [2020-10-05 22:22:29,053 INFO L226 Difference]: Without dead ends: 81 [2020-10-05 22:22:29,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-05 22:22:29,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-05 22:22:29,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-05 22:22:29,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-05 22:22:29,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-05 22:22:29,057 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-05 22:22:29,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:29,057 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-05 22:22:29,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:29,057 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-05 22:22:29,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:29,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:29,058 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:29,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:29,267 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:29,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:29,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-05 22:22:29,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:29,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889503413] [2020-10-05 22:22:29,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:29,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889503413] [2020-10-05 22:22:29,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278961774] [2020-10-05 22:22:29,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:29,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-05 22:22:29,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:29,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:29,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:29,444 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:29,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:29,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 22:22:29,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460134785] [2020-10-05 22:22:29,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:29,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:29,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:29,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:29,459 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-05 22:22:29,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:29,959 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-05 22:22:29,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:22:29,959 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 22:22:29,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:29,960 INFO L225 Difference]: With dead ends: 84 [2020-10-05 22:22:29,960 INFO L226 Difference]: Without dead ends: 78 [2020-10-05 22:22:29,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-05 22:22:29,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-05 22:22:29,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-05 22:22:29,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 22:22:29,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-05 22:22:29,964 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-05 22:22:29,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:29,964 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-05 22:22:29,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:29,964 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-05 22:22:29,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:29,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:29,965 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:30,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-05 22:22:30,175 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:30,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:30,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-05 22:22:30,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:30,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368259521] [2020-10-05 22:22:30,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:30,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368259521] [2020-10-05 22:22:30,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560978766] [2020-10-05 22:22:30,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:30,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:30,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:30,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:30,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 22:22:30,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148936704] [2020-10-05 22:22:30,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:30,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:30,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:30,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:30,346 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-05 22:22:30,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:30,808 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-05 22:22:30,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:22:30,809 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 22:22:30,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:30,810 INFO L225 Difference]: With dead ends: 104 [2020-10-05 22:22:30,810 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 22:22:30,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-05 22:22:30,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 22:22:30,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-05 22:22:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 22:22:30,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-05 22:22:30,814 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-05 22:22:30,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:30,815 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-05 22:22:30,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:30,815 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-05 22:22:30,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:30,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:30,816 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:31,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-05 22:22:31,027 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:31,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:31,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-05 22:22:31,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:31,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872406795] [2020-10-05 22:22:31,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:31,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872406795] [2020-10-05 22:22:31,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226396541] [2020-10-05 22:22:31,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:31,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:31,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:31,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:31,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:31,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:31,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:31,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 22:22:31,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822740334] [2020-10-05 22:22:31,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:31,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:31,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:31,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:31,209 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-05 22:22:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:31,709 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-05 22:22:31,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:22:31,710 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 22:22:31,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:31,711 INFO L225 Difference]: With dead ends: 85 [2020-10-05 22:22:31,711 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 22:22:31,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 22:22:31,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 22:22:31,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-05 22:22:31,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-05 22:22:31,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-05 22:22:31,714 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-05 22:22:31,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:31,714 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-05 22:22:31,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:31,714 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-05 22:22:31,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:31,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:31,715 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:31,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-05 22:22:31,915 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:31,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:31,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-05 22:22:31,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:31,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307623536] [2020-10-05 22:22:31,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:32,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:32,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307623536] [2020-10-05 22:22:32,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054470077] [2020-10-05 22:22:32,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:32,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-05 22:22:32,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:32,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:32,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:32,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:32,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 22:22:32,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311273963] [2020-10-05 22:22:32,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:32,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:32,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:32,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:32,212 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-05 22:22:32,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:32,448 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-05 22:22:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:22:32,449 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 22:22:32,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:32,450 INFO L225 Difference]: With dead ends: 94 [2020-10-05 22:22:32,450 INFO L226 Difference]: Without dead ends: 88 [2020-10-05 22:22:32,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:22:32,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-05 22:22:32,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-05 22:22:32,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 22:22:32,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-05 22:22:32,455 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-05 22:22:32,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:32,455 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-05 22:22:32,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:32,456 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-05 22:22:32,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:32,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:32,457 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:32,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-05 22:22:32,668 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:32,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:32,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-05 22:22:32,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:32,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167590649] [2020-10-05 22:22:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:32,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167590649] [2020-10-05 22:22:32,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445678281] [2020-10-05 22:22:32,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:32,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:32,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:32,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:32,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:32,951 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:32,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:32,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 22:22:32,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963370164] [2020-10-05 22:22:32,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:22:32,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:32,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:22:32,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:22:32,963 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-05 22:22:33,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:33,276 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-05 22:22:33,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:22:33,277 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 22:22:33,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:33,278 INFO L225 Difference]: With dead ends: 91 [2020-10-05 22:22:33,278 INFO L226 Difference]: Without dead ends: 85 [2020-10-05 22:22:33,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:22:33,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-05 22:22:33,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-05 22:22:33,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 22:22:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-05 22:22:33,281 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-05 22:22:33,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:33,282 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-05 22:22:33,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:22:33,282 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-05 22:22:33,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:33,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:33,282 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:33,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-05 22:22:33,491 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:33,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:33,491 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-05 22:22:33,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:33,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055811175] [2020-10-05 22:22:33,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:33,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055811175] [2020-10-05 22:22:33,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111997069] [2020-10-05 22:22:33,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:33,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-05 22:22:33,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:33,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:33,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:33,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:33,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 22:22:33,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197742482] [2020-10-05 22:22:33,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:33,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:33,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:33,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:33,717 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-05 22:22:34,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:34,139 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-05 22:22:34,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:22:34,140 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 22:22:34,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:34,142 INFO L225 Difference]: With dead ends: 88 [2020-10-05 22:22:34,142 INFO L226 Difference]: Without dead ends: 82 [2020-10-05 22:22:34,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:22:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-05 22:22:34,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-05 22:22:34,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 22:22:34,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-05 22:22:34,145 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-05 22:22:34,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:34,145 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-05 22:22:34,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:34,146 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-05 22:22:34,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:34,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:34,146 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:34,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:34,355 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:34,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:34,356 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-05 22:22:34,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:34,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461831483] [2020-10-05 22:22:34,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:34,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461831483] [2020-10-05 22:22:34,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098391098] [2020-10-05 22:22:34,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:34,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-05 22:22:34,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:34,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:34,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:34,553 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:34,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:34,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 22:22:34,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848543866] [2020-10-05 22:22:34,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:22:34,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:34,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:22:34,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:22:34,566 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-05 22:22:34,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:34,954 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-05 22:22:34,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:22:34,955 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 22:22:34,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:34,956 INFO L225 Difference]: With dead ends: 87 [2020-10-05 22:22:34,957 INFO L226 Difference]: Without dead ends: 81 [2020-10-05 22:22:34,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-05 22:22:34,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-05 22:22:34,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-05 22:22:34,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 22:22:34,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-05 22:22:34,960 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-05 22:22:34,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:34,960 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-05 22:22:34,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:22:34,960 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-05 22:22:34,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:34,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:34,961 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:35,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:35,169 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:35,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-05 22:22:35,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:35,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602848953] [2020-10-05 22:22:35,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:35,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602848953] [2020-10-05 22:22:35,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663793258] [2020-10-05 22:22:35,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:35,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:35,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:35,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:35,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 22:22:35,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172310234] [2020-10-05 22:22:35,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:35,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:35,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:35,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:35,364 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-05 22:22:35,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:35,713 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-05 22:22:35,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:22:35,713 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 22:22:35,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:35,714 INFO L225 Difference]: With dead ends: 84 [2020-10-05 22:22:35,714 INFO L226 Difference]: Without dead ends: 78 [2020-10-05 22:22:35,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-05 22:22:35,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-05 22:22:35,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-05 22:22:35,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 22:22:35,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-05 22:22:35,716 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-05 22:22:35,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:35,717 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-05 22:22:35,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:35,717 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-05 22:22:35,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:35,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:35,717 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:35,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-05 22:22:35,918 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:35,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:35,919 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-05 22:22:35,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:35,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484978807] [2020-10-05 22:22:35,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:36,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484978807] [2020-10-05 22:22:36,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647254306] [2020-10-05 22:22:36,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:36,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:36,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:36,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:36,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:36,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:36,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:36,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 22:22:36,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233471550] [2020-10-05 22:22:36,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:22:36,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:36,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:22:36,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:22:36,140 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-05 22:22:36,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:36,637 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-05 22:22:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:22:36,638 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 22:22:36,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:36,638 INFO L225 Difference]: With dead ends: 83 [2020-10-05 22:22:36,639 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 22:22:36,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-05 22:22:36,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 22:22:36,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-05 22:22:36,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 22:22:36,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-05 22:22:36,642 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-05 22:22:36,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:36,642 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-05 22:22:36,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:22:36,642 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-05 22:22:36,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:36,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:36,643 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:36,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:36,852 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:36,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:36,852 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-05 22:22:36,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:36,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672621532] [2020-10-05 22:22:36,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:36,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672621532] [2020-10-05 22:22:36,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793160729] [2020-10-05 22:22:36,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:37,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-05 22:22:37,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:37,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:37,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:37,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:37,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 22:22:37,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92502397] [2020-10-05 22:22:37,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:37,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:37,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:37,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:37,032 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-05 22:22:37,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:37,444 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-05 22:22:37,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 22:22:37,448 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 22:22:37,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:37,449 INFO L225 Difference]: With dead ends: 80 [2020-10-05 22:22:37,449 INFO L226 Difference]: Without dead ends: 74 [2020-10-05 22:22:37,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-05 22:22:37,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-05 22:22:37,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-05 22:22:37,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 22:22:37,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-05 22:22:37,451 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-05 22:22:37,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:37,451 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-05 22:22:37,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-05 22:22:37,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:37,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:37,452 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:37,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-05 22:22:37,653 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:37,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:37,654 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-05 22:22:37,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:37,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094351152] [2020-10-05 22:22:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:37,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094351152] [2020-10-05 22:22:37,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5966491] [2020-10-05 22:22:37,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:37,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:37,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:37,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:37,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:37,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:37,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:37,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 22:22:37,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381477800] [2020-10-05 22:22:37,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:22:37,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:37,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:22:37,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:22:37,850 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-05 22:22:38,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:38,389 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-05 22:22:38,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:22:38,390 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 22:22:38,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:38,391 INFO L225 Difference]: With dead ends: 79 [2020-10-05 22:22:38,391 INFO L226 Difference]: Without dead ends: 73 [2020-10-05 22:22:38,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 22:22:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-05 22:22:38,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-05 22:22:38,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 22:22:38,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-05 22:22:38,394 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-05 22:22:38,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:38,394 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-05 22:22:38,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:22:38,395 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-05 22:22:38,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:38,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:38,395 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:38,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:38,600 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:38,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:38,600 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-05 22:22:38,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:38,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651980067] [2020-10-05 22:22:38,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:38,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651980067] [2020-10-05 22:22:38,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405260007] [2020-10-05 22:22:38,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:38,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-05 22:22:38,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:38,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:38,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:38,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:38,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 22:22:38,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940568549] [2020-10-05 22:22:38,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:38,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:38,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:38,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:38,776 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-05 22:22:39,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:39,230 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-05 22:22:39,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:22:39,231 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 22:22:39,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:39,232 INFO L225 Difference]: With dead ends: 95 [2020-10-05 22:22:39,232 INFO L226 Difference]: Without dead ends: 89 [2020-10-05 22:22:39,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 22:22:39,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-05 22:22:39,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-05 22:22:39,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-05 22:22:39,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-05 22:22:39,236 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-05 22:22:39,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:39,237 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-05 22:22:39,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:39,237 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-05 22:22:39,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:39,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:39,237 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:39,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-05 22:22:39,438 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:39,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:39,439 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-05 22:22:39,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:39,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017647832] [2020-10-05 22:22:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:39,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017647832] [2020-10-05 22:22:39,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729736313] [2020-10-05 22:22:39,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:39,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-05 22:22:39,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:39,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:39,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:39,632 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:39,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:39,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 22:22:39,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572335741] [2020-10-05 22:22:39,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:22:39,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:39,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:22:39,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:22:39,644 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-05 22:22:40,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:40,253 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-05 22:22:40,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 22:22:40,254 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 22:22:40,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:40,254 INFO L225 Difference]: With dead ends: 76 [2020-10-05 22:22:40,254 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 22:22:40,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 22:22:40,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 22:22:40,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-05 22:22:40,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-05 22:22:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-05 22:22:40,258 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-05 22:22:40,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:40,258 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-05 22:22:40,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:22:40,258 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-05 22:22:40,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:40,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:40,259 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:40,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:40,462 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:40,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:40,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-05 22:22:40,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:40,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376994546] [2020-10-05 22:22:40,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:40,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376994546] [2020-10-05 22:22:40,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247500416] [2020-10-05 22:22:40,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:40,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:40,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:40,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:22:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:40,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:40,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 22:22:40,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831525509] [2020-10-05 22:22:40,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:22:40,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:40,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:22:40,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:22:40,705 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-05 22:22:41,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:41,234 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-05 22:22:41,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:22:41,234 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 22:22:41,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:41,235 INFO L225 Difference]: With dead ends: 84 [2020-10-05 22:22:41,235 INFO L226 Difference]: Without dead ends: 79 [2020-10-05 22:22:41,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 22:22:41,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-05 22:22:41,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-05 22:22:41,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 22:22:41,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-05 22:22:41,241 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-05 22:22:41,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:41,241 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-05 22:22:41,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:22:41,241 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-05 22:22:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 22:22:41,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:41,243 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:41,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-05 22:22:41,453 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:41,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:41,454 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-05 22:22:41,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:41,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768819176] [2020-10-05 22:22:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:41,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768819176] [2020-10-05 22:22:41,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71948314] [2020-10-05 22:22:41,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:41,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:41,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:41,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 22:22:41,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:41,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:22:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:41,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:41,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 22:22:41,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673744528] [2020-10-05 22:22:41,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 22:22:41,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:41,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 22:22:41,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:22:41,651 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-05 22:22:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:42,276 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-05 22:22:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:22:42,276 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 22:22:42,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:42,277 INFO L225 Difference]: With dead ends: 72 [2020-10-05 22:22:42,278 INFO L226 Difference]: Without dead ends: 67 [2020-10-05 22:22:42,278 INFO L675 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 [2020-10-05 22:22:42,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-05 22:22:42,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-05 22:22:42,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 22:22:42,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-05 22:22:42,281 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-05 22:22:42,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:42,282 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-05 22:22:42,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 22:22:42,282 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-05 22:22:42,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 22:22:42,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:42,282 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:42,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-05 22:22:42,489 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:42,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:42,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-05 22:22:42,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:42,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585789112] [2020-10-05 22:22:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:42,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585789112] [2020-10-05 22:22:42,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472305083] [2020-10-05 22:22:42,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:42,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-05 22:22:42,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:42,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 22:22:42,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:42,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:42,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-05 22:22:42,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422512176] [2020-10-05 22:22:42,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:22:42,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:42,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:22:42,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:22:42,711 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-05 22:22:42,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:42,985 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-05 22:22:42,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:22:42,986 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-05 22:22:42,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:42,987 INFO L225 Difference]: With dead ends: 78 [2020-10-05 22:22:42,987 INFO L226 Difference]: Without dead ends: 72 [2020-10-05 22:22:42,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-05 22:22:42,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-05 22:22:42,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-05 22:22:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 22:22:42,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-05 22:22:42,990 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-05 22:22:42,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:42,990 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-05 22:22:42,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:22:42,991 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-05 22:22:42,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 22:22:42,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:42,991 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:43,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:43,201 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:43,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:43,201 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-05 22:22:43,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:43,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761093165] [2020-10-05 22:22:43,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:43,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761093165] [2020-10-05 22:22:43,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086542806] [2020-10-05 22:22:43,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:43,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:43,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:43,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 22:22:43,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:43,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:43,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:43,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 22:22:43,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177871313] [2020-10-05 22:22:43,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 22:22:43,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:43,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 22:22:43,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:22:43,457 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-05 22:22:43,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:43,758 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-05 22:22:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:22:43,759 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 22:22:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:43,760 INFO L225 Difference]: With dead ends: 90 [2020-10-05 22:22:43,760 INFO L226 Difference]: Without dead ends: 84 [2020-10-05 22:22:43,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:22:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-05 22:22:43,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-05 22:22:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 22:22:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-05 22:22:43,764 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-05 22:22:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:43,764 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-05 22:22:43,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 22:22:43,764 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-05 22:22:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 22:22:43,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:43,765 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:43,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:43,966 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:43,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:43,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-05 22:22:43,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:43,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171505130] [2020-10-05 22:22:43,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:44,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171505130] [2020-10-05 22:22:44,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722410305] [2020-10-05 22:22:44,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:44,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-05 22:22:44,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:44,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 22:22:44,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:44,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:44,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-05 22:22:44,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161210835] [2020-10-05 22:22:44,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:22:44,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:44,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:22:44,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:22:44,193 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-05 22:22:44,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:44,544 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-05 22:22:44,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:22:44,545 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-05 22:22:44,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:44,546 INFO L225 Difference]: With dead ends: 91 [2020-10-05 22:22:44,546 INFO L226 Difference]: Without dead ends: 85 [2020-10-05 22:22:44,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-05 22:22:44,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-05 22:22:44,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-05 22:22:44,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-05 22:22:44,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-05 22:22:44,548 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-05 22:22:44,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:44,549 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-05 22:22:44,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:22:44,549 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-05 22:22:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 22:22:44,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:44,549 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:44,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:44,752 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:44,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:44,752 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-05 22:22:44,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:44,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079437397] [2020-10-05 22:22:44,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:44,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079437397] [2020-10-05 22:22:44,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978776821] [2020-10-05 22:22:44,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:44,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-05 22:22:44,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:44,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 22:22:44,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:45,007 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:45,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:45,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 22:22:45,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791024922] [2020-10-05 22:22:45,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 22:22:45,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:45,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 22:22:45,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:22:45,032 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-05 22:22:45,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:45,535 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-05 22:22:45,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:22:45,536 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 22:22:45,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:45,537 INFO L225 Difference]: With dead ends: 99 [2020-10-05 22:22:45,538 INFO L226 Difference]: Without dead ends: 93 [2020-10-05 22:22:45,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-05 22:22:45,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-05 22:22:45,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-05 22:22:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 22:22:45,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-05 22:22:45,542 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-05 22:22:45,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:45,543 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-05 22:22:45,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 22:22:45,543 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-05 22:22:45,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 22:22:45,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:45,544 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:45,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:45,754 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:45,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:45,756 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-05 22:22:45,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:45,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460160343] [2020-10-05 22:22:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:45,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460160343] [2020-10-05 22:22:45,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825373288] [2020-10-05 22:22:45,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:46,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 22:22:46,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:46,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:46,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-05 22:22:46,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363306312] [2020-10-05 22:22:46,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:22:46,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:46,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:22:46,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:22:46,057 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-05 22:22:46,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:46,608 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-05 22:22:46,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 22:22:46,609 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-05 22:22:46,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:46,611 INFO L225 Difference]: With dead ends: 99 [2020-10-05 22:22:46,611 INFO L226 Difference]: Without dead ends: 93 [2020-10-05 22:22:46,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-05 22:22:46,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-05 22:22:46,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-05 22:22:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-05 22:22:46,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-05 22:22:46,615 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-05 22:22:46,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:46,616 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-05 22:22:46,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:22:46,616 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-05 22:22:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 22:22:46,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:46,617 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:46,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-05 22:22:46,818 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:46,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:46,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-05 22:22:46,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:46,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768302099] [2020-10-05 22:22:46,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:46,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768302099] [2020-10-05 22:22:46,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75501399] [2020-10-05 22:22:46,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:47,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:47,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:47,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 22:22:47,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:47,053 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:47,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:47,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 22:22:47,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885988002] [2020-10-05 22:22:47,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 22:22:47,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:47,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 22:22:47,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:22:47,068 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-05 22:22:47,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:47,531 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-05 22:22:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:22:47,532 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 22:22:47,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:47,533 INFO L225 Difference]: With dead ends: 96 [2020-10-05 22:22:47,533 INFO L226 Difference]: Without dead ends: 90 [2020-10-05 22:22:47,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 22:22:47,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-05 22:22:47,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-05 22:22:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-05 22:22:47,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-05 22:22:47,537 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-05 22:22:47,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:47,537 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-05 22:22:47,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 22:22:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-05 22:22:47,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 22:22:47,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:47,538 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:47,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:47,738 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:47,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:47,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-05 22:22:47,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:47,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855501335] [2020-10-05 22:22:47,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:47,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855501335] [2020-10-05 22:22:47,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237759035] [2020-10-05 22:22:47,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:47,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-05 22:22:47,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:47,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 22:22:47,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:47,932 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:47,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:47,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-05 22:22:47,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579106745] [2020-10-05 22:22:47,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:22:47,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:47,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:22:47,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:22:47,934 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-05 22:22:48,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:48,373 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-05 22:22:48,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:22:48,374 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-05 22:22:48,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:48,375 INFO L225 Difference]: With dead ends: 97 [2020-10-05 22:22:48,375 INFO L226 Difference]: Without dead ends: 91 [2020-10-05 22:22:48,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 22:22:48,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-05 22:22:48,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-05 22:22:48,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 22:22:48,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-05 22:22:48,378 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-05 22:22:48,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:48,378 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-05 22:22:48,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:22:48,378 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-05 22:22:48,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 22:22:48,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:48,379 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:48,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-05 22:22:48,580 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:48,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:48,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-05 22:22:48,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:48,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173957404] [2020-10-05 22:22:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:48,703 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:48,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173957404] [2020-10-05 22:22:48,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286433992] [2020-10-05 22:22:48,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:48,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:48,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:48,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 22:22:48,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:48,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:48,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:48,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 22:22:48,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873690670] [2020-10-05 22:22:48,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 22:22:48,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:48,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 22:22:48,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:22:48,842 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-05 22:22:49,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:49,626 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-05 22:22:49,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:22:49,627 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 22:22:49,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:49,628 INFO L225 Difference]: With dead ends: 94 [2020-10-05 22:22:49,628 INFO L226 Difference]: Without dead ends: 88 [2020-10-05 22:22:49,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-10-05 22:22:49,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-05 22:22:49,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-05 22:22:49,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 22:22:49,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-05 22:22:49,632 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-05 22:22:49,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:49,633 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-05 22:22:49,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 22:22:49,633 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-05 22:22:49,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 22:22:49,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:49,634 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:49,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:49,846 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:49,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:49,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-05 22:22:49,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:49,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243880550] [2020-10-05 22:22:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:50,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243880550] [2020-10-05 22:22:50,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793911367] [2020-10-05 22:22:50,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:50,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-05 22:22:50,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:50,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 22:22:50,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:50,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:50,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-05 22:22:50,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416960744] [2020-10-05 22:22:50,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:22:50,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:50,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:22:50,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:22:50,146 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-05 22:22:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:50,841 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-05 22:22:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 22:22:50,842 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-05 22:22:50,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:50,843 INFO L225 Difference]: With dead ends: 95 [2020-10-05 22:22:50,844 INFO L226 Difference]: Without dead ends: 89 [2020-10-05 22:22:50,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 22:22:50,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-05 22:22:50,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-05 22:22:50,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-05 22:22:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-05 22:22:50,847 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-05 22:22:50,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:50,848 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-05 22:22:50,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:22:50,848 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-05 22:22:50,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 22:22:50,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:50,849 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:51,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-05 22:22:51,058 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:51,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:51,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-05 22:22:51,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:51,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249271621] [2020-10-05 22:22:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:51,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249271621] [2020-10-05 22:22:51,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985220416] [2020-10-05 22:22:51,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:51,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-05 22:22:51,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:51,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 22:22:51,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:51,278 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:51,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:51,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 22:22:51,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997497934] [2020-10-05 22:22:51,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 22:22:51,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:51,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 22:22:51,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:22:51,293 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-05 22:22:51,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:51,916 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-05 22:22:51,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 22:22:51,917 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 22:22:51,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:51,918 INFO L225 Difference]: With dead ends: 92 [2020-10-05 22:22:51,918 INFO L226 Difference]: Without dead ends: 86 [2020-10-05 22:22:51,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 22:22:51,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-05 22:22:51,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-05 22:22:51,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 22:22:51,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-05 22:22:51,922 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-05 22:22:51,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:51,922 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-05 22:22:51,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 22:22:51,922 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-05 22:22:51,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 22:22:51,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:51,923 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:52,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:52,132 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:52,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:52,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-05 22:22:52,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:52,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798545618] [2020-10-05 22:22:52,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:52,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798545618] [2020-10-05 22:22:52,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471918859] [2020-10-05 22:22:52,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:52,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 22:22:52,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:52,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:52,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-05 22:22:52,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961988527] [2020-10-05 22:22:52,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:22:52,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:52,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:22:52,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:22:52,314 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-05 22:22:52,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:52,792 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-05 22:22:52,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 22:22:52,793 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-05 22:22:52,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:52,794 INFO L225 Difference]: With dead ends: 112 [2020-10-05 22:22:52,794 INFO L226 Difference]: Without dead ends: 106 [2020-10-05 22:22:52,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-05 22:22:52,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-05 22:22:52,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-05 22:22:52,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-05 22:22:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-05 22:22:52,798 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-05 22:22:52,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:52,798 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-05 22:22:52,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:22:52,798 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-05 22:22:52,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 22:22:52,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:52,799 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:53,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:53,009 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:53,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:53,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-05 22:22:53,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:53,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148761814] [2020-10-05 22:22:53,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:53,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148761814] [2020-10-05 22:22:53,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981254461] [2020-10-05 22:22:53,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:53,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:53,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:53,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 22:22:53,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:53,229 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:53,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:53,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 22:22:53,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105333756] [2020-10-05 22:22:53,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 22:22:53,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:53,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 22:22:53,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:22:53,244 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-05 22:22:53,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:53,931 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-05 22:22:53,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:22:53,931 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 22:22:53,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:53,932 INFO L225 Difference]: With dead ends: 93 [2020-10-05 22:22:53,932 INFO L226 Difference]: Without dead ends: 85 [2020-10-05 22:22:53,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 22:22:53,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-05 22:22:53,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-05 22:22:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-05 22:22:53,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-05 22:22:53,935 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-05 22:22:53,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:53,935 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-05 22:22:53,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 22:22:53,935 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-05 22:22:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 22:22:53,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:53,936 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:54,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:54,137 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:54,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:54,137 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-05 22:22:54,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:54,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278529523] [2020-10-05 22:22:54,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:54,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278529523] [2020-10-05 22:22:54,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791508918] [2020-10-05 22:22:54,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:54,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-05 22:22:54,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:54,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 22:22:54,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:54,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:54,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-05 22:22:54,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948284855] [2020-10-05 22:22:54,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 22:22:54,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:54,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 22:22:54,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:22:54,386 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-05 22:22:54,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:54,709 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-05 22:22:54,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:22:54,710 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-05 22:22:54,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:54,711 INFO L225 Difference]: With dead ends: 104 [2020-10-05 22:22:54,711 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 22:22:54,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-05 22:22:54,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 22:22:54,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-05 22:22:54,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 22:22:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-05 22:22:54,715 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-05 22:22:54,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:54,715 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-05 22:22:54,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 22:22:54,716 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-05 22:22:54,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 22:22:54,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:54,716 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:54,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:54,926 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:54,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:54,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-05 22:22:54,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:54,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543047997] [2020-10-05 22:22:54,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:55,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543047997] [2020-10-05 22:22:55,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900579737] [2020-10-05 22:22:55,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:55,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:55,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:55,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 22:22:55,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:55,181 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:55,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:55,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 22:22:55,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140819452] [2020-10-05 22:22:55,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:22:55,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:55,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:22:55,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:22:55,202 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-05 22:22:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:55,628 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-05 22:22:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:22:55,629 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 22:22:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:55,630 INFO L225 Difference]: With dead ends: 101 [2020-10-05 22:22:55,630 INFO L226 Difference]: Without dead ends: 95 [2020-10-05 22:22:55,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-05 22:22:55,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-05 22:22:55,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-05 22:22:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 22:22:55,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-05 22:22:55,634 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-05 22:22:55,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:55,635 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-05 22:22:55,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:22:55,635 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-05 22:22:55,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 22:22:55,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:55,636 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:55,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:55,844 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:55,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:55,844 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-05 22:22:55,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:55,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947689001] [2020-10-05 22:22:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:55,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947689001] [2020-10-05 22:22:55,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750872047] [2020-10-05 22:22:55,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:56,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-05 22:22:56,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:56,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 22:22:56,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:56,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:56,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-05 22:22:56,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696055547] [2020-10-05 22:22:56,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 22:22:56,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:56,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 22:22:56,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:22:56,126 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-05 22:22:56,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:56,658 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-05 22:22:56,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:22:56,659 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-05 22:22:56,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:56,660 INFO L225 Difference]: With dead ends: 98 [2020-10-05 22:22:56,660 INFO L226 Difference]: Without dead ends: 92 [2020-10-05 22:22:56,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-05 22:22:56,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-05 22:22:56,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-05 22:22:56,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 22:22:56,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-05 22:22:56,669 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-05 22:22:56,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:56,670 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-05 22:22:56,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 22:22:56,672 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-05 22:22:56,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 22:22:56,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:56,673 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:56,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:56,885 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:56,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:56,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-05 22:22:56,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:56,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212618907] [2020-10-05 22:22:56,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:57,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212618907] [2020-10-05 22:22:57,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984720112] [2020-10-05 22:22:57,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:57,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-05 22:22:57,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:57,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 22:22:57,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:57,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:57,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:57,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 22:22:57,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999991756] [2020-10-05 22:22:57,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:22:57,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:57,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:22:57,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:22:57,273 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-05 22:22:57,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:57,922 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-05 22:22:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:22:57,922 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 22:22:57,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:57,923 INFO L225 Difference]: With dead ends: 97 [2020-10-05 22:22:57,923 INFO L226 Difference]: Without dead ends: 91 [2020-10-05 22:22:57,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 22:22:57,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-05 22:22:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-05 22:22:57,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 22:22:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-05 22:22:57,926 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-05 22:22:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:57,926 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-05 22:22:57,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:22:57,927 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-05 22:22:57,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 22:22:57,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:57,930 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:58,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:58,138 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:58,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:58,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-05 22:22:58,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:58,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284731738] [2020-10-05 22:22:58,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:58,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284731738] [2020-10-05 22:22:58,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047128700] [2020-10-05 22:22:58,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:58,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 22:22:58,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:58,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:58,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-05 22:22:58,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387654728] [2020-10-05 22:22:58,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 22:22:58,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:58,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 22:22:58,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:22:58,359 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-05 22:22:58,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:58,798 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-05 22:22:58,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 22:22:58,799 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-05 22:22:58,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:58,800 INFO L225 Difference]: With dead ends: 94 [2020-10-05 22:22:58,800 INFO L226 Difference]: Without dead ends: 88 [2020-10-05 22:22:58,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 22:22:58,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-05 22:22:58,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-05 22:22:58,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 22:22:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-05 22:22:58,803 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-05 22:22:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:58,803 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-05 22:22:58,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 22:22:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-05 22:22:58,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 22:22:58,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:58,804 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:59,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-05 22:22:59,015 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:59,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:59,015 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-05 22:22:59,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:59,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337241285] [2020-10-05 22:22:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:59,170 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:59,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337241285] [2020-10-05 22:22:59,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124148110] [2020-10-05 22:22:59,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:59,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:59,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:59,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 22:22:59,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:59,248 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:59,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:59,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 22:22:59,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179307371] [2020-10-05 22:22:59,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:22:59,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:59,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:22:59,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:22:59,262 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-05 22:22:59,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:59,842 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-05 22:22:59,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:22:59,843 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 22:22:59,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:59,844 INFO L225 Difference]: With dead ends: 93 [2020-10-05 22:22:59,844 INFO L226 Difference]: Without dead ends: 87 [2020-10-05 22:22:59,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 22:22:59,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-05 22:22:59,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-05 22:22:59,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 22:22:59,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-05 22:22:59,847 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-05 22:22:59,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:59,847 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-05 22:22:59,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:22:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-05 22:22:59,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 22:22:59,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:59,848 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:00,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:00,050 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:00,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:00,050 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-05 22:23:00,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:00,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941109621] [2020-10-05 22:23:00,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:00,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941109621] [2020-10-05 22:23:00,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811703488] [2020-10-05 22:23:00,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:00,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-05 22:23:00,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:00,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 22:23:00,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:00,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:00,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-05 22:23:00,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782317428] [2020-10-05 22:23:00,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 22:23:00,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:00,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 22:23:00,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:23:00,314 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-05 22:23:00,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:00,874 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-05 22:23:00,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:23:00,874 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-05 22:23:00,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:00,875 INFO L225 Difference]: With dead ends: 90 [2020-10-05 22:23:00,875 INFO L226 Difference]: Without dead ends: 84 [2020-10-05 22:23:00,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-05 22:23:00,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-05 22:23:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-05 22:23:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 22:23:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-05 22:23:00,878 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-05 22:23:00,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:00,878 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-05 22:23:00,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 22:23:00,878 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-05 22:23:00,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 22:23:00,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:00,879 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:01,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-05 22:23:01,086 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:01,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:01,086 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-05 22:23:01,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:01,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073398867] [2020-10-05 22:23:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:01,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073398867] [2020-10-05 22:23:01,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270013911] [2020-10-05 22:23:01,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:01,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:23:01,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:01,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 22:23:01,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:01,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:01,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:01,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 22:23:01,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428505772] [2020-10-05 22:23:01,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:23:01,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:01,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:23:01,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:23:01,328 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-05 22:23:02,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:02,005 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-05 22:23:02,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 22:23:02,006 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 22:23:02,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:02,007 INFO L225 Difference]: With dead ends: 89 [2020-10-05 22:23:02,007 INFO L226 Difference]: Without dead ends: 83 [2020-10-05 22:23:02,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-05 22:23:02,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-05 22:23:02,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-05 22:23:02,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 22:23:02,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-05 22:23:02,010 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-05 22:23:02,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:02,010 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-05 22:23:02,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:23:02,010 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-05 22:23:02,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 22:23:02,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:02,010 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:02,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:02,211 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:02,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:02,212 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-05 22:23:02,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:02,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518886345] [2020-10-05 22:23:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:02,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518886345] [2020-10-05 22:23:02,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704910223] [2020-10-05 22:23:02,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:02,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-05 22:23:02,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:02,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 22:23:02,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:02,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:02,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-05 22:23:02,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135722039] [2020-10-05 22:23:02,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 22:23:02,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:02,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 22:23:02,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:23:02,414 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-05 22:23:02,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:02,975 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-05 22:23:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 22:23:02,976 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-05 22:23:02,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:02,977 INFO L225 Difference]: With dead ends: 86 [2020-10-05 22:23:02,977 INFO L226 Difference]: Without dead ends: 80 [2020-10-05 22:23:02,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 22:23:02,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-05 22:23:02,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-05 22:23:02,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 22:23:02,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-05 22:23:02,980 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-05 22:23:02,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:02,981 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-05 22:23:02,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 22:23:02,981 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-05 22:23:02,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 22:23:02,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:02,981 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:03,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:03,187 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:03,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:03,187 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-05 22:23:03,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:03,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330048377] [2020-10-05 22:23:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:03,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330048377] [2020-10-05 22:23:03,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220982240] [2020-10-05 22:23:03,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:03,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-05 22:23:03,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:03,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 22:23:03,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:03,424 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:03,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:03,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 22:23:03,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488127560] [2020-10-05 22:23:03,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:23:03,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:03,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:23:03,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:23:03,441 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-05 22:23:04,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:04,207 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-05 22:23:04,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:23:04,208 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 22:23:04,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:04,209 INFO L225 Difference]: With dead ends: 85 [2020-10-05 22:23:04,209 INFO L226 Difference]: Without dead ends: 79 [2020-10-05 22:23:04,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 22:23:04,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-05 22:23:04,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-05 22:23:04,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 22:23:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-05 22:23:04,211 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-05 22:23:04,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:04,211 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-05 22:23:04,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:23:04,211 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-05 22:23:04,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 22:23:04,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:04,212 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:04,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:04,413 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:04,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:04,413 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-05 22:23:04,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:04,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252118802] [2020-10-05 22:23:04,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:04,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252118802] [2020-10-05 22:23:04,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860305280] [2020-10-05 22:23:04,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:04,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 22:23:04,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:04,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:04,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-05 22:23:04,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510077588] [2020-10-05 22:23:04,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 22:23:04,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:04,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 22:23:04,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:23:04,635 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-05 22:23:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:05,234 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-05 22:23:05,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 22:23:05,235 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-05 22:23:05,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:05,236 INFO L225 Difference]: With dead ends: 101 [2020-10-05 22:23:05,236 INFO L226 Difference]: Without dead ends: 95 [2020-10-05 22:23:05,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 22:23:05,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-05 22:23:05,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-05 22:23:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-05 22:23:05,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-05 22:23:05,239 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-05 22:23:05,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:05,239 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-05 22:23:05,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 22:23:05,240 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-05 22:23:05,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 22:23:05,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:05,240 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:05,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:05,449 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:05,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:05,449 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-05 22:23:05,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:05,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663750161] [2020-10-05 22:23:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:05,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663750161] [2020-10-05 22:23:05,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077789003] [2020-10-05 22:23:05,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:05,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:23:05,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:05,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 22:23:05,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:05,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:05,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 22:23:05,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719027491] [2020-10-05 22:23:05,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:23:05,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:05,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:23:05,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:23:05,689 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-05 22:23:06,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:06,393 INFO L93 Difference]: Finished difference Result 80 states and 197 transitions. [2020-10-05 22:23:06,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:23:06,394 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 22:23:06,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:06,395 INFO L225 Difference]: With dead ends: 80 [2020-10-05 22:23:06,395 INFO L226 Difference]: Without dead ends: 72 [2020-10-05 22:23:06,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 22:23:06,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-05 22:23:06,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-05 22:23:06,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-05 22:23:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-05 22:23:06,398 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-05 22:23:06,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:06,398 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-05 22:23:06,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:23:06,398 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-05 22:23:06,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 22:23:06,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:06,399 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:06,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:06,600 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:06,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:06,600 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-05 22:23:06,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:06,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72589683] [2020-10-05 22:23:06,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:06,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72589683] [2020-10-05 22:23:06,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712642272] [2020-10-05 22:23:06,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:06,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-05 22:23:06,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:06,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 22:23:06,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:06,805 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:23:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:06,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:06,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 22:23:06,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397792880] [2020-10-05 22:23:06,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:23:06,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:06,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:23:06,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:23:06,823 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-05 22:23:07,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:07,576 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-05 22:23:07,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 22:23:07,577 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 22:23:07,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:07,578 INFO L225 Difference]: With dead ends: 92 [2020-10-05 22:23:07,578 INFO L226 Difference]: Without dead ends: 87 [2020-10-05 22:23:07,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 22:23:07,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-05 22:23:07,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-05 22:23:07,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-05 22:23:07,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-05 22:23:07,580 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-05 22:23:07,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:07,581 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-05 22:23:07,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:23:07,581 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-05 22:23:07,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 22:23:07,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:07,581 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:07,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:07,782 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:07,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:07,783 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-05 22:23:07,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:07,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393055448] [2020-10-05 22:23:07,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:07,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393055448] [2020-10-05 22:23:07,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933741985] [2020-10-05 22:23:07,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:07,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:23:07,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:07,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 22:23:07,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:08,015 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:23:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:08,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:08,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 22:23:08,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320231019] [2020-10-05 22:23:08,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 22:23:08,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:08,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 22:23:08,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:23:08,033 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-05 22:23:08,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:08,848 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-05 22:23:08,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 22:23:08,849 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 22:23:08,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:08,850 INFO L225 Difference]: With dead ends: 78 [2020-10-05 22:23:08,850 INFO L226 Difference]: Without dead ends: 73 [2020-10-05 22:23:08,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 22:23:08,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-05 22:23:08,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-05 22:23:08,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 22:23:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-05 22:23:08,854 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-05 22:23:08,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:08,854 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-05 22:23:08,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 22:23:08,854 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-05 22:23:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 22:23:08,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:08,855 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:09,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-05 22:23:09,063 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:09,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:09,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-05 22:23:09,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:09,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875145853] [2020-10-05 22:23:09,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:09,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875145853] [2020-10-05 22:23:09,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672294839] [2020-10-05 22:23:09,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:09,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-05 22:23:09,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:09,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 22:23:09,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:09,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:09,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 22:23:09,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682106942] [2020-10-05 22:23:09,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:23:09,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:09,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:23:09,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:23:09,335 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-05 22:23:09,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:09,660 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-05 22:23:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:23:09,661 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 22:23:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:09,662 INFO L225 Difference]: With dead ends: 84 [2020-10-05 22:23:09,662 INFO L226 Difference]: Without dead ends: 78 [2020-10-05 22:23:09,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-05 22:23:09,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-05 22:23:09,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-05 22:23:09,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 22:23:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-05 22:23:09,665 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-05 22:23:09,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:09,665 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-05 22:23:09,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:23:09,665 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-05 22:23:09,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 22:23:09,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:09,665 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:09,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:09,866 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:09,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:09,867 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-05 22:23:09,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:09,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44973429] [2020-10-05 22:23:09,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:10,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44973429] [2020-10-05 22:23:10,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260888973] [2020-10-05 22:23:10,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:10,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-05 22:23:10,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:10,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 22:23:10,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:10,135 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:10,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:10,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 22:23:10,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379017386] [2020-10-05 22:23:10,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 22:23:10,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:10,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 22:23:10,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:23:10,153 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-05 22:23:10,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:10,557 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-05 22:23:10,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:23:10,558 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 22:23:10,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:10,559 INFO L225 Difference]: With dead ends: 98 [2020-10-05 22:23:10,559 INFO L226 Difference]: Without dead ends: 92 [2020-10-05 22:23:10,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-10-05 22:23:10,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-05 22:23:10,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-05 22:23:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-05 22:23:10,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-05 22:23:10,562 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-05 22:23:10,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:10,562 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-05 22:23:10,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 22:23:10,562 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-05 22:23:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 22:23:10,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:10,563 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:10,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-05 22:23:10,763 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:10,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:10,764 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-05 22:23:10,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:10,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68818521] [2020-10-05 22:23:10,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:10,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68818521] [2020-10-05 22:23:10,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712180455] [2020-10-05 22:23:10,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:11,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 22:23:11,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:11,030 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:11,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:11,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 22:23:11,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294737750] [2020-10-05 22:23:11,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:23:11,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:11,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:23:11,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:23:11,032 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-05 22:23:11,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:11,452 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-05 22:23:11,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 22:23:11,453 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 22:23:11,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:11,454 INFO L225 Difference]: With dead ends: 99 [2020-10-05 22:23:11,454 INFO L226 Difference]: Without dead ends: 93 [2020-10-05 22:23:11,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 22:23:11,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-05 22:23:11,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-05 22:23:11,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 22:23:11,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-05 22:23:11,458 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-05 22:23:11,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:11,458 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-05 22:23:11,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:23:11,458 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-05 22:23:11,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 22:23:11,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:11,459 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:11,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:11,660 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:11,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:11,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-05 22:23:11,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:11,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317612657] [2020-10-05 22:23:11,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:11,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317612657] [2020-10-05 22:23:11,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512182996] [2020-10-05 22:23:11,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:11,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:23:11,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:11,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 22:23:11,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:11,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:11,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:11,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 22:23:11,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843797884] [2020-10-05 22:23:11,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 22:23:11,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:11,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 22:23:11,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:23:11,942 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-05 22:23:12,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:12,427 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-05 22:23:12,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:23:12,427 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 22:23:12,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:12,428 INFO L225 Difference]: With dead ends: 109 [2020-10-05 22:23:12,429 INFO L226 Difference]: Without dead ends: 103 [2020-10-05 22:23:12,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-10-05 22:23:12,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-05 22:23:12,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-05 22:23:12,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 22:23:12,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-05 22:23:12,431 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-05 22:23:12,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:12,432 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-05 22:23:12,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 22:23:12,432 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-05 22:23:12,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 22:23:12,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:12,432 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:12,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:12,641 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:12,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:12,641 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-05 22:23:12,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:12,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139454468] [2020-10-05 22:23:12,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:12,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139454468] [2020-10-05 22:23:12,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927662254] [2020-10-05 22:23:12,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:12,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-05 22:23:12,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:12,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 22:23:12,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:12,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:12,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 22:23:12,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996912289] [2020-10-05 22:23:12,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:23:12,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:12,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:23:12,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:23:12,904 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-05 22:23:13,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:13,398 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-05 22:23:13,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:23:13,399 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 22:23:13,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:13,400 INFO L225 Difference]: With dead ends: 109 [2020-10-05 22:23:13,401 INFO L226 Difference]: Without dead ends: 103 [2020-10-05 22:23:13,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 22:23:13,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-05 22:23:13,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-05 22:23:13,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-05 22:23:13,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-05 22:23:13,404 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-05 22:23:13,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:13,404 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-05 22:23:13,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:23:13,405 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-05 22:23:13,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 22:23:13,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:13,405 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:13,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-05 22:23:13,615 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:13,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:13,615 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-05 22:23:13,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:13,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147023644] [2020-10-05 22:23:13,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:13,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147023644] [2020-10-05 22:23:13,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075011962] [2020-10-05 22:23:13,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:13,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:23:13,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:13,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 22:23:13,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:13,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:13,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:13,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 22:23:13,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655958574] [2020-10-05 22:23:13,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 22:23:13,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:13,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 22:23:13,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:23:13,900 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-05 22:23:14,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:14,483 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-05 22:23:14,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:23:14,484 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 22:23:14,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:14,485 INFO L225 Difference]: With dead ends: 106 [2020-10-05 22:23:14,485 INFO L226 Difference]: Without dead ends: 100 [2020-10-05 22:23:14,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 22:23:14,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-05 22:23:14,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-05 22:23:14,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 22:23:14,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-05 22:23:14,488 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-05 22:23:14,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:14,488 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-05 22:23:14,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 22:23:14,488 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-05 22:23:14,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 22:23:14,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:14,489 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:14,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-05 22:23:14,698 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:14,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:14,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-05 22:23:14,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:14,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256809007] [2020-10-05 22:23:14,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:14,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:14,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256809007] [2020-10-05 22:23:14,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049698618] [2020-10-05 22:23:14,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:14,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-05 22:23:14,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:14,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 22:23:14,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:14,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:14,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 22:23:14,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809029200] [2020-10-05 22:23:14,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:23:14,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:14,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:23:14,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:23:14,948 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-05 22:23:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:15,568 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-05 22:23:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 22:23:15,569 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 22:23:15,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:15,571 INFO L225 Difference]: With dead ends: 107 [2020-10-05 22:23:15,571 INFO L226 Difference]: Without dead ends: 101 [2020-10-05 22:23:15,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-05 22:23:15,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-05 22:23:15,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-05 22:23:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-05 22:23:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-05 22:23:15,575 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-05 22:23:15,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:15,575 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-05 22:23:15,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:23:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-05 22:23:15,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 22:23:15,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:15,576 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:15,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:15,777 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:15,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:15,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-05 22:23:15,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:15,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213836508] [2020-10-05 22:23:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:15,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213836508] [2020-10-05 22:23:15,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334123248] [2020-10-05 22:23:15,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:16,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-05 22:23:16,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:16,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 22:23:16,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:16,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:16,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:16,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 22:23:16,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561465046] [2020-10-05 22:23:16,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 22:23:16,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:16,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 22:23:16,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:23:16,077 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-05 22:23:16,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:16,713 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-05 22:23:16,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 22:23:16,714 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 22:23:16,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:16,715 INFO L225 Difference]: With dead ends: 104 [2020-10-05 22:23:16,715 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 22:23:16,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 22:23:16,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 22:23:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-05 22:23:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-05 22:23:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-05 22:23:16,718 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-05 22:23:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:16,719 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-05 22:23:16,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 22:23:16,719 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-05 22:23:16,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 22:23:16,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:16,719 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:16,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-05 22:23:16,921 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:16,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:16,922 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-05 22:23:16,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:16,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582120286] [2020-10-05 22:23:16,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:17,080 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:17,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582120286] [2020-10-05 22:23:17,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385626158] [2020-10-05 22:23:17,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:17,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 22:23:17,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:17,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:17,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 22:23:17,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229118617] [2020-10-05 22:23:17,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:23:17,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:17,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:23:17,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:23:17,152 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-05 22:23:17,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:17,751 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-05 22:23:17,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 22:23:17,752 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 22:23:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:17,753 INFO L225 Difference]: With dead ends: 105 [2020-10-05 22:23:17,753 INFO L226 Difference]: Without dead ends: 99 [2020-10-05 22:23:17,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 22:23:17,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-05 22:23:17,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-05 22:23:17,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 22:23:17,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-05 22:23:17,758 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-05 22:23:17,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:17,758 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-05 22:23:17,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:23:17,758 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-05 22:23:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 22:23:17,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:17,759 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:17,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:17,963 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:17,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:17,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-05 22:23:17,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:17,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061234317] [2020-10-05 22:23:17,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:18,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061234317] [2020-10-05 22:23:18,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487310221] [2020-10-05 22:23:18,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:18,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:23:18,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:18,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 22:23:18,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:18,216 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:18,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:18,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 22:23:18,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637849967] [2020-10-05 22:23:18,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 22:23:18,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:18,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 22:23:18,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:23:18,230 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-05 22:23:18,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:18,981 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-05 22:23:18,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:23:18,981 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 22:23:18,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:18,982 INFO L225 Difference]: With dead ends: 102 [2020-10-05 22:23:18,982 INFO L226 Difference]: Without dead ends: 96 [2020-10-05 22:23:18,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 22:23:18,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-05 22:23:18,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-05 22:23:18,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 22:23:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-05 22:23:18,985 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-05 22:23:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:18,986 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-05 22:23:18,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 22:23:18,986 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-05 22:23:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 22:23:18,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:18,986 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:19,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-05 22:23:19,195 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:19,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:19,195 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-05 22:23:19,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:19,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963531820] [2020-10-05 22:23:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:19,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963531820] [2020-10-05 22:23:19,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758337715] [2020-10-05 22:23:19,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:19,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-05 22:23:19,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:19,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 22:23:19,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:19,439 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:19,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:19,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 22:23:19,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271372566] [2020-10-05 22:23:19,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:23:19,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:19,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:23:19,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:23:19,441 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-05 22:23:20,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:20,094 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-05 22:23:20,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 22:23:20,095 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 22:23:20,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:20,096 INFO L225 Difference]: With dead ends: 103 [2020-10-05 22:23:20,096 INFO L226 Difference]: Without dead ends: 97 [2020-10-05 22:23:20,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 22:23:20,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-05 22:23:20,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-05 22:23:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-05 22:23:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-05 22:23:20,099 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-05 22:23:20,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:20,099 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-05 22:23:20,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:23:20,099 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-05 22:23:20,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 22:23:20,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:20,099 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:20,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:20,300 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:20,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:20,301 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-05 22:23:20,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:20,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985067127] [2020-10-05 22:23:20,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:20,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985067127] [2020-10-05 22:23:20,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665990532] [2020-10-05 22:23:20,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:20,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:23:20,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:20,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 22:23:20,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:20,535 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:20,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:20,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 22:23:20,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698273348] [2020-10-05 22:23:20,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 22:23:20,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:20,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 22:23:20,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:23:20,549 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-05 22:23:21,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:21,372 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-05 22:23:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 22:23:21,373 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 22:23:21,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:21,373 INFO L225 Difference]: With dead ends: 100 [2020-10-05 22:23:21,373 INFO L226 Difference]: Without dead ends: 94 [2020-10-05 22:23:21,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 22:23:21,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-05 22:23:21,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-05 22:23:21,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-05 22:23:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-05 22:23:21,376 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-05 22:23:21,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:21,376 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-05 22:23:21,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 22:23:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-05 22:23:21,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 22:23:21,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:21,377 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:21,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-05 22:23:21,578 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:21,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:21,579 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-05 22:23:21,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:21,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535516245] [2020-10-05 22:23:21,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:21,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:21,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535516245] [2020-10-05 22:23:21,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8399542] [2020-10-05 22:23:21,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:21,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-05 22:23:21,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:21,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 22:23:21,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:21,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:21,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 22:23:21,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668233963] [2020-10-05 22:23:21,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:23:21,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:21,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:23:21,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:23:21,873 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-05 22:23:22,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:22,666 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-05 22:23:22,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 22:23:22,666 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 22:23:22,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:22,667 INFO L225 Difference]: With dead ends: 120 [2020-10-05 22:23:22,667 INFO L226 Difference]: Without dead ends: 114 [2020-10-05 22:23:22,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 22:23:22,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-05 22:23:22,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-05 22:23:22,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-05 22:23:22,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-05 22:23:22,672 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-05 22:23:22,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:22,673 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-05 22:23:22,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:23:22,673 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-05 22:23:22,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 22:23:22,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:22,674 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:22,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-05 22:23:22,883 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:22,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:22,884 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-05 22:23:22,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:22,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426582702] [2020-10-05 22:23:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:23,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426582702] [2020-10-05 22:23:23,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898056547] [2020-10-05 22:23:23,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:23,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-05 22:23:23,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:23,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 22:23:23,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:23,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:23,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 22:23:23,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558473819] [2020-10-05 22:23:23,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 22:23:23,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:23,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 22:23:23,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:23:23,212 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-05 22:23:24,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:24,075 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-05 22:23:24,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 22:23:24,076 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 22:23:24,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:24,077 INFO L225 Difference]: With dead ends: 101 [2020-10-05 22:23:24,077 INFO L226 Difference]: Without dead ends: 93 [2020-10-05 22:23:24,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 22:23:24,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-05 22:23:24,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-05 22:23:24,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-05 22:23:24,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-05 22:23:24,082 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-05 22:23:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:24,082 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-05 22:23:24,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 22:23:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-05 22:23:24,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 22:23:24,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:24,083 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:24,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:24,290 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:24,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:24,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-05 22:23:24,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:24,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814595937] [2020-10-05 22:23:24,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:24,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814595937] [2020-10-05 22:23:24,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977640678] [2020-10-05 22:23:24,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:24,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 22:23:24,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:24,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:24,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 22:23:24,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732799619] [2020-10-05 22:23:24,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 22:23:24,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:24,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 22:23:24,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:23:24,590 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-05 22:23:24,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:25,000 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-05 22:23:25,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:23:25,001 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 22:23:25,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:25,001 INFO L225 Difference]: With dead ends: 114 [2020-10-05 22:23:25,001 INFO L226 Difference]: Without dead ends: 108 [2020-10-05 22:23:25,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 22:23:25,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-05 22:23:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-05 22:23:25,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 22:23:25,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 22:23:25,004 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-05 22:23:25,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:25,004 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 22:23:25,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 22:23:25,004 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 22:23:25,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 22:23:25,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:25,005 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:25,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:25,206 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:25,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:25,206 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-05 22:23:25,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:25,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235133436] [2020-10-05 22:23:25,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:25,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235133436] [2020-10-05 22:23:25,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966884934] [2020-10-05 22:23:25,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:25,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:23:25,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:25,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 22:23:25,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:25,523 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:25,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:25,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 22:23:25,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705762473] [2020-10-05 22:23:25,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 22:23:25,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:25,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 22:23:25,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:23:25,536 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-05 22:23:26,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:26,050 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-05 22:23:26,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:23:26,051 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 22:23:26,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:26,052 INFO L225 Difference]: With dead ends: 111 [2020-10-05 22:23:26,052 INFO L226 Difference]: Without dead ends: 105 [2020-10-05 22:23:26,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 22:23:26,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-05 22:23:26,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-05 22:23:26,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 22:23:26,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 22:23:26,054 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-05 22:23:26,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:26,054 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 22:23:26,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 22:23:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 22:23:26,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 22:23:26,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:26,055 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:26,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-05 22:23:26,258 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:26,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:26,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-05 22:23:26,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:26,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977874782] [2020-10-05 22:23:26,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:26,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977874782] [2020-10-05 22:23:26,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241214191] [2020-10-05 22:23:26,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:26,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-05 22:23:26,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:26,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 22:23:26,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:26,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:26,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 22:23:26,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944975878] [2020-10-05 22:23:26,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 22:23:26,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:26,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 22:23:26,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:23:26,546 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-05 22:23:27,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:27,022 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-05 22:23:27,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 22:23:27,023 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 22:23:27,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:27,023 INFO L225 Difference]: With dead ends: 108 [2020-10-05 22:23:27,024 INFO L226 Difference]: Without dead ends: 102 [2020-10-05 22:23:27,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-05 22:23:27,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-05 22:23:27,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-05 22:23:27,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 22:23:27,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 22:23:27,027 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-05 22:23:27,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:27,027 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 22:23:27,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 22:23:27,028 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 22:23:27,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 22:23:27,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:27,028 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:27,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:27,236 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:27,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:27,237 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-05 22:23:27,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:27,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425418933] [2020-10-05 22:23:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:27,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425418933] [2020-10-05 22:23:27,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712715779] [2020-10-05 22:23:27,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:27,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:23:27,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:27,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 22:23:27,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:27,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:27,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:27,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 22:23:27,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316183996] [2020-10-05 22:23:27,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 22:23:27,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:27,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 22:23:27,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:23:27,673 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-05 22:23:28,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:28,214 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-05 22:23:28,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:23:28,215 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 22:23:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:28,215 INFO L225 Difference]: With dead ends: 107 [2020-10-05 22:23:28,215 INFO L226 Difference]: Without dead ends: 101 [2020-10-05 22:23:28,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-05 22:23:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-05 22:23:28,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-05 22:23:28,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 22:23:28,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 22:23:28,218 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-05 22:23:28,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:28,218 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 22:23:28,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 22:23:28,219 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 22:23:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 22:23:28,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:28,219 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:28,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-05 22:23:28,428 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:28,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:28,429 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-05 22:23:28,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:28,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114765141] [2020-10-05 22:23:28,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:28,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114765141] [2020-10-05 22:23:28,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087024728] [2020-10-05 22:23:28,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:28,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-05 22:23:28,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:28,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 22:23:28,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:28,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:28,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 22:23:28,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048138609] [2020-10-05 22:23:28,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 22:23:28,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:28,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 22:23:28,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:23:28,790 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-05 22:23:29,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:29,298 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-05 22:23:29,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:23:29,299 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 22:23:29,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:29,299 INFO L225 Difference]: With dead ends: 104 [2020-10-05 22:23:29,300 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 22:23:29,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 22:23:29,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 22:23:29,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-05 22:23:29,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 22:23:29,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 22:23:29,303 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-05 22:23:29,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:29,303 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 22:23:29,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 22:23:29,303 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 22:23:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 22:23:29,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:29,304 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:29,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-05 22:23:29,513 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:29,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:29,513 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-05 22:23:29,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:29,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683599107] [2020-10-05 22:23:29,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:29,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683599107] [2020-10-05 22:23:29,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857484558] [2020-10-05 22:23:29,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:29,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-05 22:23:29,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:29,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 22:23:29,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:29,804 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:29,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:29,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 22:23:29,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417808764] [2020-10-05 22:23:29,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 22:23:29,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:29,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 22:23:29,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:23:29,819 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-05 22:23:30,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:30,519 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-05 22:23:30,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 22:23:30,520 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 22:23:30,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:30,520 INFO L225 Difference]: With dead ends: 103 [2020-10-05 22:23:30,521 INFO L226 Difference]: Without dead ends: 97 [2020-10-05 22:23:30,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 22:23:30,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-05 22:23:30,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-05 22:23:30,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 22:23:30,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 22:23:30,523 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-05 22:23:30,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:30,524 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 22:23:30,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 22:23:30,524 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 22:23:30,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 22:23:30,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:30,524 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:30,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-05 22:23:30,730 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:30,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:30,730 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-05 22:23:30,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:30,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100647158] [2020-10-05 22:23:30,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:30,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100647158] [2020-10-05 22:23:30,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587806284] [2020-10-05 22:23:30,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:30,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 22:23:30,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:31,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:31,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 22:23:31,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279289560] [2020-10-05 22:23:31,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 22:23:31,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:31,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 22:23:31,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:23:31,002 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-05 22:23:31,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:31,615 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-05 22:23:31,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 22:23:31,616 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 22:23:31,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:31,616 INFO L225 Difference]: With dead ends: 100 [2020-10-05 22:23:31,617 INFO L226 Difference]: Without dead ends: 94 [2020-10-05 22:23:31,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 22:23:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-05 22:23:31,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-05 22:23:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 22:23:31,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 22:23:31,619 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-05 22:23:31,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:31,619 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 22:23:31,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 22:23:31,620 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 22:23:31,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 22:23:31,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:31,620 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:31,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:31,830 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:31,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:31,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-05 22:23:31,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:31,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604871965] [2020-10-05 22:23:31,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:32,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604871965] [2020-10-05 22:23:32,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140235150] [2020-10-05 22:23:32,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:32,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:23:32,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:32,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 22:23:32,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:32,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:32,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:32,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 22:23:32,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612321261] [2020-10-05 22:23:32,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 22:23:32,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:32,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 22:23:32,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:23:32,121 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-05 22:23:32,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:32,905 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-05 22:23:32,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:23:32,906 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 22:23:32,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:32,906 INFO L225 Difference]: With dead ends: 99 [2020-10-05 22:23:32,907 INFO L226 Difference]: Without dead ends: 93 [2020-10-05 22:23:32,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 22:23:32,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-05 22:23:32,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-05 22:23:32,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 22:23:32,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 22:23:32,910 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-05 22:23:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:32,910 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 22:23:32,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 22:23:32,910 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 22:23:32,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 22:23:32,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:32,911 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:33,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-05 22:23:33,119 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:33,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:33,119 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-05 22:23:33,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:33,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116266952] [2020-10-05 22:23:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:33,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116266952] [2020-10-05 22:23:33,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052956562] [2020-10-05 22:23:33,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:33,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-05 22:23:33,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:33,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 22:23:33,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:33,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:33,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 22:23:33,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618840658] [2020-10-05 22:23:33,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 22:23:33,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:33,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 22:23:33,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:23:33,381 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-05 22:23:34,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:34,046 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-05 22:23:34,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 22:23:34,047 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 22:23:34,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:34,047 INFO L225 Difference]: With dead ends: 96 [2020-10-05 22:23:34,048 INFO L226 Difference]: Without dead ends: 90 [2020-10-05 22:23:34,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 22:23:34,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-05 22:23:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-05 22:23:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 22:23:34,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 22:23:34,050 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-05 22:23:34,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:34,050 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 22:23:34,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 22:23:34,051 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 22:23:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 22:23:34,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:34,051 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:34,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:34,255 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:34,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:34,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-05 22:23:34,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:34,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775920972] [2020-10-05 22:23:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:34,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775920972] [2020-10-05 22:23:34,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038159968] [2020-10-05 22:23:34,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:34,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:23:34,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:34,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 22:23:34,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:34,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:34,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:34,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 22:23:34,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526116486] [2020-10-05 22:23:34,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 22:23:34,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:34,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 22:23:34,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:23:34,531 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-05 22:23:35,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:35,421 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-05 22:23:35,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 22:23:35,422 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 22:23:35,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:35,423 INFO L225 Difference]: With dead ends: 95 [2020-10-05 22:23:35,423 INFO L226 Difference]: Without dead ends: 89 [2020-10-05 22:23:35,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 22:23:35,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-05 22:23:35,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-05 22:23:35,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 22:23:35,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 22:23:35,426 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-05 22:23:35,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:35,426 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 22:23:35,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 22:23:35,426 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 22:23:35,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 22:23:35,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:35,428 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:35,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:35,636 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:35,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:35,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-05 22:23:35,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:35,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061873582] [2020-10-05 22:23:35,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:35,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061873582] [2020-10-05 22:23:35,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197614293] [2020-10-05 22:23:35,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:35,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-05 22:23:35,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:35,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 22:23:35,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:35,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:35,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 22:23:35,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485147563] [2020-10-05 22:23:35,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 22:23:35,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:35,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 22:23:35,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:23:35,949 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-05 22:23:36,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:36,711 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-05 22:23:36,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 22:23:36,712 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 22:23:36,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:36,713 INFO L225 Difference]: With dead ends: 92 [2020-10-05 22:23:36,713 INFO L226 Difference]: Without dead ends: 86 [2020-10-05 22:23:36,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 22:23:36,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-05 22:23:36,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-05 22:23:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 22:23:36,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 22:23:36,715 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-05 22:23:36,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:36,716 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 22:23:36,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 22:23:36,716 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 22:23:36,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 22:23:36,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:36,716 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:36,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:36,917 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:36,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:36,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-05 22:23:36,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:36,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053280867] [2020-10-05 22:23:36,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:37,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053280867] [2020-10-05 22:23:37,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560268091] [2020-10-05 22:23:37,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:37,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-05 22:23:37,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:37,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 22:23:37,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:37,182 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:37,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:37,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 22:23:37,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116350609] [2020-10-05 22:23:37,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 22:23:37,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:37,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 22:23:37,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:23:37,199 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-05 22:23:38,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:38,178 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-05 22:23:38,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 22:23:38,178 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 22:23:38,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:38,179 INFO L225 Difference]: With dead ends: 91 [2020-10-05 22:23:38,179 INFO L226 Difference]: Without dead ends: 85 [2020-10-05 22:23:38,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-05 22:23:38,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-05 22:23:38,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-05 22:23:38,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 22:23:38,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 22:23:38,182 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-05 22:23:38,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:38,182 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 22:23:38,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 22:23:38,182 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 22:23:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 22:23:38,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:38,183 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:38,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:38,391 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:38,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:38,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-05 22:23:38,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:38,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431114751] [2020-10-05 22:23:38,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:38,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431114751] [2020-10-05 22:23:38,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488663077] [2020-10-05 22:23:38,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:38,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 22:23:38,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:38,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:38,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 22:23:38,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794398751] [2020-10-05 22:23:38,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 22:23:38,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:38,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 22:23:38,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:23:38,704 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-05 22:23:39,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:39,449 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-05 22:23:39,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 22:23:39,450 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 22:23:39,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:39,451 INFO L225 Difference]: With dead ends: 107 [2020-10-05 22:23:39,451 INFO L226 Difference]: Without dead ends: 101 [2020-10-05 22:23:39,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 22:23:39,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-05 22:23:39,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-05 22:23:39,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-05 22:23:39,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-05 22:23:39,454 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-05 22:23:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:39,455 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-05 22:23:39,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 22:23:39,455 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-05 22:23:39,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 22:23:39,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:39,456 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:39,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-05 22:23:39,664 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:39,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:39,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-05 22:23:39,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:39,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482055579] [2020-10-05 22:23:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:39,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482055579] [2020-10-05 22:23:39,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521191478] [2020-10-05 22:23:39,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:39,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:23:39,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:39,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 22:23:39,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:39,931 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:39,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:39,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 22:23:39,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855441469] [2020-10-05 22:23:39,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 22:23:39,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:39,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 22:23:39,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:23:39,946 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-05 22:23:40,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:40,968 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-05 22:23:40,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 22:23:40,969 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 22:23:40,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:40,970 INFO L225 Difference]: With dead ends: 88 [2020-10-05 22:23:40,970 INFO L226 Difference]: Without dead ends: 80 [2020-10-05 22:23:40,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 22:23:40,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-05 22:23:40,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-05 22:23:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 22:23:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-05 22:23:40,972 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-05 22:23:40,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:40,972 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-05 22:23:40,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 22:23:40,972 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-05 22:23:40,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 22:23:40,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:40,973 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:41,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-05 22:23:41,174 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:41,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:41,174 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-05 22:23:41,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:41,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250761051] [2020-10-05 22:23:41,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:41,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250761051] [2020-10-05 22:23:41,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791290623] [2020-10-05 22:23:41,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:41,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-05 22:23:41,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:41,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 22:23:41,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:41,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:23:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:41,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:41,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 22:23:41,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304901525] [2020-10-05 22:23:41,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 22:23:41,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:41,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 22:23:41,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:23:41,462 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-05 22:23:42,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:42,397 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-05 22:23:42,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 22:23:42,398 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 22:23:42,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:42,399 INFO L225 Difference]: With dead ends: 100 [2020-10-05 22:23:42,399 INFO L226 Difference]: Without dead ends: 95 [2020-10-05 22:23:42,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 22:23:42,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-05 22:23:42,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-05 22:23:42,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-05 22:23:42,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-05 22:23:42,401 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-05 22:23:42,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:42,401 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-05 22:23:42,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 22:23:42,402 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-05 22:23:42,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 22:23:42,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:42,402 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:42,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-05 22:23:42,603 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:42,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:42,603 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-05 22:23:42,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:42,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514902599] [2020-10-05 22:23:42,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:42,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514902599] [2020-10-05 22:23:42,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701116863] [2020-10-05 22:23:42,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:42,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:23:42,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:42,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 22:23:42,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:42,873 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:23:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:42,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:42,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 22:23:42,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243954110] [2020-10-05 22:23:42,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 22:23:42,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:42,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 22:23:42,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:23:42,894 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-05 22:23:43,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:43,921 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-05 22:23:43,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 22:23:43,922 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 22:23:43,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:43,922 INFO L225 Difference]: With dead ends: 84 [2020-10-05 22:23:43,923 INFO L226 Difference]: Without dead ends: 79 [2020-10-05 22:23:43,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 22:23:43,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-05 22:23:43,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-05 22:23:43,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 22:23:43,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-05 22:23:43,925 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-05 22:23:43,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:43,925 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-05 22:23:43,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 22:23:43,925 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-05 22:23:43,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 22:23:43,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:43,925 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:44,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-05 22:23:44,126 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:44,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:44,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-05 22:23:44,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:44,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977238477] [2020-10-05 22:23:44,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:44,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977238477] [2020-10-05 22:23:44,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770410439] [2020-10-05 22:23:44,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:44,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-05 22:23:44,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:44,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 22:23:44,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:44,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:44,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 22:23:44,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205148571] [2020-10-05 22:23:44,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 22:23:44,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:44,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 22:23:44,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:23:44,455 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-05 22:23:44,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:44,879 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-05 22:23:44,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:23:44,879 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 22:23:44,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:44,880 INFO L225 Difference]: With dead ends: 90 [2020-10-05 22:23:44,880 INFO L226 Difference]: Without dead ends: 84 [2020-10-05 22:23:44,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 22:23:44,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-05 22:23:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-05 22:23:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-05 22:23:44,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-05 22:23:44,883 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-05 22:23:44,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:44,883 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-05 22:23:44,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 22:23:44,883 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-05 22:23:44,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 22:23:44,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:44,884 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:45,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:45,087 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:45,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:45,087 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-05 22:23:45,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:45,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030748298] [2020-10-05 22:23:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:45,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030748298] [2020-10-05 22:23:45,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794453782] [2020-10-05 22:23:45,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:45,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-05 22:23:45,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:45,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 22:23:45,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:45,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:45,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:45,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 22:23:45,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234116973] [2020-10-05 22:23:45,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 22:23:45,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:45,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 22:23:45,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:23:45,463 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-05 22:23:45,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:45,963 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-05 22:23:45,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:23:45,967 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 22:23:45,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:45,968 INFO L225 Difference]: With dead ends: 106 [2020-10-05 22:23:45,968 INFO L226 Difference]: Without dead ends: 100 [2020-10-05 22:23:45,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 22:23:45,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-05 22:23:45,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-05 22:23:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 22:23:45,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-05 22:23:45,970 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-05 22:23:45,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:45,970 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-05 22:23:45,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 22:23:45,971 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-05 22:23:45,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 22:23:45,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:45,971 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:46,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-05 22:23:46,175 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:46,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:46,176 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-05 22:23:46,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:46,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389605356] [2020-10-05 22:23:46,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:46,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389605356] [2020-10-05 22:23:46,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649078077] [2020-10-05 22:23:46,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:46,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 22:23:46,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:46,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:46,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 22:23:46,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831812348] [2020-10-05 22:23:46,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 22:23:46,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:46,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 22:23:46,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:23:46,508 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-05 22:23:47,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:47,021 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-05 22:23:47,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:23:47,022 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 22:23:47,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:47,023 INFO L225 Difference]: With dead ends: 107 [2020-10-05 22:23:47,023 INFO L226 Difference]: Without dead ends: 101 [2020-10-05 22:23:47,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 22:23:47,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-05 22:23:47,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-05 22:23:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-05 22:23:47,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-05 22:23:47,027 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-05 22:23:47,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:47,027 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-05 22:23:47,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 22:23:47,028 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-05 22:23:47,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 22:23:47,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:47,028 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:47,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-05 22:23:47,237 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:47,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:47,237 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-05 22:23:47,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:47,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315114551] [2020-10-05 22:23:47,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:47,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315114551] [2020-10-05 22:23:47,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613023743] [2020-10-05 22:23:47,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:47,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:23:47,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:47,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 22:23:47,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:47,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:47,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:47,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 22:23:47,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241944647] [2020-10-05 22:23:47,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 22:23:47,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:47,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 22:23:47,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:23:47,605 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-05 22:23:48,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:48,176 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-05 22:23:48,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:23:48,177 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 22:23:48,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:48,178 INFO L225 Difference]: With dead ends: 119 [2020-10-05 22:23:48,178 INFO L226 Difference]: Without dead ends: 113 [2020-10-05 22:23:48,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 22:23:48,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-05 22:23:48,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-05 22:23:48,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-05 22:23:48,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-05 22:23:48,180 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-05 22:23:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:48,180 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-05 22:23:48,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 22:23:48,181 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-05 22:23:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 22:23:48,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:48,181 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:48,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-05 22:23:48,382 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:48,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:48,382 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-05 22:23:48,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:48,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528541288] [2020-10-05 22:23:48,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:48,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528541288] [2020-10-05 22:23:48,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773096513] [2020-10-05 22:23:48,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:48,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-05 22:23:48,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:48,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 22:23:48,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:48,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:48,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 22:23:48,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747804397] [2020-10-05 22:23:48,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 22:23:48,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:48,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 22:23:48,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:23:48,696 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-05 22:23:49,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:49,299 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-05 22:23:49,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 22:23:49,300 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 22:23:49,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:49,300 INFO L225 Difference]: With dead ends: 119 [2020-10-05 22:23:49,301 INFO L226 Difference]: Without dead ends: 113 [2020-10-05 22:23:49,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 22:23:49,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-05 22:23:49,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-05 22:23:49,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 22:23:49,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-05 22:23:49,303 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-05 22:23:49,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:49,304 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-05 22:23:49,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 22:23:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-05 22:23:49,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 22:23:49,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:49,304 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:49,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:49,513 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:49,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:49,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-05 22:23:49,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:49,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167783783] [2020-10-05 22:23:49,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:49,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167783783] [2020-10-05 22:23:49,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143799277] [2020-10-05 22:23:49,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:49,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:23:49,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:49,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 22:23:49,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:49,832 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:49,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:49,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 22:23:49,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556181979] [2020-10-05 22:23:49,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 22:23:49,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:49,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 22:23:49,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:23:49,846 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-05 22:23:50,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:50,545 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-05 22:23:50,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 22:23:50,545 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 22:23:50,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:50,546 INFO L225 Difference]: With dead ends: 116 [2020-10-05 22:23:50,546 INFO L226 Difference]: Without dead ends: 110 [2020-10-05 22:23:50,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 22:23:50,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-05 22:23:50,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-05 22:23:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 22:23:50,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-05 22:23:50,548 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-05 22:23:50,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:50,549 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-05 22:23:50,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 22:23:50,549 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-05 22:23:50,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 22:23:50,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:50,549 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:50,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:50,750 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:50,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:50,751 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-05 22:23:50,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:50,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487141811] [2020-10-05 22:23:50,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:51,001 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:51,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487141811] [2020-10-05 22:23:51,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479531208] [2020-10-05 22:23:51,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:51,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-05 22:23:51,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:51,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 22:23:51,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:51,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:51,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 22:23:51,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230760872] [2020-10-05 22:23:51,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 22:23:51,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:51,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 22:23:51,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:23:51,111 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-05 22:23:51,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:51,715 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-05 22:23:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 22:23:51,716 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 22:23:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:51,716 INFO L225 Difference]: With dead ends: 117 [2020-10-05 22:23:51,716 INFO L226 Difference]: Without dead ends: 111 [2020-10-05 22:23:51,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 22:23:51,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-05 22:23:51,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-05 22:23:51,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-05 22:23:51,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-05 22:23:51,718 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-05 22:23:51,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:51,718 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-05 22:23:51,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 22:23:51,719 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-05 22:23:51,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 22:23:51,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:51,719 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:51,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:51,920 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:51,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:51,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-05 22:23:51,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:51,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747672674] [2020-10-05 22:23:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:52,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747672674] [2020-10-05 22:23:52,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22988622] [2020-10-05 22:23:52,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:52,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-05 22:23:52,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:52,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 22:23:52,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:52,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:52,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:52,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 22:23:52,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515823620] [2020-10-05 22:23:52,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 22:23:52,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:52,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 22:23:52,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:23:52,271 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-05 22:23:53,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:53,020 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-05 22:23:53,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:23:53,021 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 22:23:53,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:53,022 INFO L225 Difference]: With dead ends: 114 [2020-10-05 22:23:53,022 INFO L226 Difference]: Without dead ends: 108 [2020-10-05 22:23:53,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 22:23:53,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-05 22:23:53,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-05 22:23:53,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-05 22:23:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-05 22:23:53,025 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-05 22:23:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:53,025 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-05 22:23:53,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 22:23:53,026 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-05 22:23:53,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 22:23:53,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:53,026 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:53,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-05 22:23:53,236 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:53,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:53,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-05 22:23:53,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:53,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009850393] [2020-10-05 22:23:53,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:53,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009850393] [2020-10-05 22:23:53,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923356251] [2020-10-05 22:23:53,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:53,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 22:23:53,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:53,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:53,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 22:23:53,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776534678] [2020-10-05 22:23:53,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 22:23:53,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:53,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 22:23:53,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:23:53,533 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-05 22:23:54,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:54,256 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-05 22:23:54,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 22:23:54,257 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 22:23:54,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:54,258 INFO L225 Difference]: With dead ends: 115 [2020-10-05 22:23:54,258 INFO L226 Difference]: Without dead ends: 109 [2020-10-05 22:23:54,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 22:23:54,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-05 22:23:54,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-05 22:23:54,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-05 22:23:54,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-05 22:23:54,260 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-05 22:23:54,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:54,261 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-05 22:23:54,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 22:23:54,261 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-05 22:23:54,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 22:23:54,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:54,261 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:54,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:54,465 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:54,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:54,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-05 22:23:54,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:54,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377699186] [2020-10-05 22:23:54,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:54,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377699186] [2020-10-05 22:23:54,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084860108] [2020-10-05 22:23:54,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:54,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:23:54,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:54,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 22:23:54,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:54,768 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:54,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:54,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 22:23:54,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055027441] [2020-10-05 22:23:54,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 22:23:54,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:54,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 22:23:54,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:23:54,784 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-05 22:23:55,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:55,647 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-05 22:23:55,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 22:23:55,648 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 22:23:55,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:55,649 INFO L225 Difference]: With dead ends: 112 [2020-10-05 22:23:55,649 INFO L226 Difference]: Without dead ends: 106 [2020-10-05 22:23:55,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 22:23:55,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-05 22:23:55,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-05 22:23:55,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-05 22:23:55,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-05 22:23:55,651 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-05 22:23:55,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:55,651 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-05 22:23:55,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 22:23:55,652 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-05 22:23:55,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 22:23:55,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:55,652 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:55,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-05 22:23:55,853 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:55,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:55,853 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-05 22:23:55,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:55,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868681790] [2020-10-05 22:23:55,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:56,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868681790] [2020-10-05 22:23:56,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140235630] [2020-10-05 22:23:56,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:56,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-05 22:23:56,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:56,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 22:23:56,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:56,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:56,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 22:23:56,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373711287] [2020-10-05 22:23:56,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 22:23:56,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:56,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 22:23:56,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:23:56,135 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-05 22:23:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:56,919 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-05 22:23:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 22:23:56,920 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 22:23:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:56,921 INFO L225 Difference]: With dead ends: 113 [2020-10-05 22:23:56,921 INFO L226 Difference]: Without dead ends: 107 [2020-10-05 22:23:56,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-05 22:23:56,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-05 22:23:56,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-05 22:23:56,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 22:23:56,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 22:23:56,923 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-05 22:23:56,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:56,924 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 22:23:56,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 22:23:56,924 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 22:23:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 22:23:56,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:56,924 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:57,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-05 22:23:57,125 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:57,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:57,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-05 22:23:57,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:57,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428789538] [2020-10-05 22:23:57,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:57,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428789538] [2020-10-05 22:23:57,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484760423] [2020-10-05 22:23:57,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:57,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:23:57,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:57,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 22:23:57,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:57,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:23:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:57,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:57,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 22:23:57,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166704931] [2020-10-05 22:23:57,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 22:23:57,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:57,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 22:23:57,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:23:57,441 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-05 22:23:58,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:58,407 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-05 22:23:58,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 22:23:58,408 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 22:23:58,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:58,408 INFO L225 Difference]: With dead ends: 110 [2020-10-05 22:23:58,408 INFO L226 Difference]: Without dead ends: 104 [2020-10-05 22:23:58,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-05 22:23:58,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-05 22:23:58,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-05 22:23:58,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 22:23:58,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 22:23:58,411 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-05 22:23:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:58,411 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 22:23:58,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 22:23:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 22:23:58,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 22:23:58,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:58,412 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:23:58,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-05 22:23:58,616 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:23:58,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:23:58,617 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-05 22:23:58,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:23:58,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601569977] [2020-10-05 22:23:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:23:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:23:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:58,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601569977] [2020-10-05 22:23:58,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531043669] [2020-10-05 22:23:58,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:23:58,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-05 22:23:58,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:23:58,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 22:23:58,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:23:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:23:58,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:23:58,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 22:23:58,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872557178] [2020-10-05 22:23:58,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 22:23:58,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:23:58,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 22:23:58,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:23:58,902 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-05 22:23:59,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:23:59,857 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-05 22:23:59,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-05 22:23:59,857 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 22:23:59,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:23:59,858 INFO L225 Difference]: With dead ends: 111 [2020-10-05 22:23:59,858 INFO L226 Difference]: Without dead ends: 105 [2020-10-05 22:23:59,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 22:23:59,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-05 22:23:59,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-05 22:23:59,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-05 22:23:59,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-05 22:23:59,860 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-05 22:23:59,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:23:59,860 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-05 22:23:59,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 22:23:59,861 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-05 22:23:59,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 22:23:59,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:23:59,861 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:00,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:00,062 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:00,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:00,063 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-05 22:24:00,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:00,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514257065] [2020-10-05 22:24:00,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:00,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514257065] [2020-10-05 22:24:00,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392698992] [2020-10-05 22:24:00,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:00,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-05 22:24:00,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:00,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 22:24:00,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:00,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:24:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:00,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:00,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 22:24:00,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703015612] [2020-10-05 22:24:00,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 22:24:00,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:00,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 22:24:00,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:24:00,374 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-05 22:24:01,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:01,421 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-05 22:24:01,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 22:24:01,422 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 22:24:01,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:01,422 INFO L225 Difference]: With dead ends: 108 [2020-10-05 22:24:01,422 INFO L226 Difference]: Without dead ends: 102 [2020-10-05 22:24:01,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 22:24:01,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-05 22:24:01,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-05 22:24:01,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-05 22:24:01,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-05 22:24:01,425 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-05 22:24:01,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:01,426 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-05 22:24:01,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 22:24:01,426 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-05 22:24:01,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 22:24:01,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:01,426 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:01,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-05 22:24:01,627 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:01,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:01,627 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-05 22:24:01,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:01,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598630347] [2020-10-05 22:24:01,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:01,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598630347] [2020-10-05 22:24:01,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139119907] [2020-10-05 22:24:01,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:01,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 22:24:01,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:01,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:01,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 22:24:01,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146090167] [2020-10-05 22:24:01,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 22:24:01,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:01,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 22:24:01,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:24:01,911 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-05 22:24:02,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:02,821 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-05 22:24:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 22:24:02,822 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 22:24:02,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:02,823 INFO L225 Difference]: With dead ends: 128 [2020-10-05 22:24:02,823 INFO L226 Difference]: Without dead ends: 122 [2020-10-05 22:24:02,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-05 22:24:02,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-05 22:24:02,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-05 22:24:02,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-05 22:24:02,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-05 22:24:02,826 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-05 22:24:02,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:02,826 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-05 22:24:02,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 22:24:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-05 22:24:02,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 22:24:02,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:02,827 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:03,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:03,035 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:03,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:03,035 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-05 22:24:03,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:03,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584756518] [2020-10-05 22:24:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:03,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584756518] [2020-10-05 22:24:03,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933182621] [2020-10-05 22:24:03,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:03,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:24:03,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:03,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 22:24:03,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:03,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:03,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 22:24:03,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52849523] [2020-10-05 22:24:03,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 22:24:03,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:03,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 22:24:03,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:24:03,342 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-05 22:24:04,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:04,434 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-05 22:24:04,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-05 22:24:04,435 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 22:24:04,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:04,435 INFO L225 Difference]: With dead ends: 109 [2020-10-05 22:24:04,435 INFO L226 Difference]: Without dead ends: 101 [2020-10-05 22:24:04,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=733, Invalid=1817, Unknown=0, NotChecked=0, Total=2550 [2020-10-05 22:24:04,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-05 22:24:04,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-05 22:24:04,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-05 22:24:04,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-05 22:24:04,438 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-05 22:24:04,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:04,438 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-05 22:24:04,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 22:24:04,438 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-05 22:24:04,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 22:24:04,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:04,439 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:04,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:04,639 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:04,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:04,640 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-05 22:24:04,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:04,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935542022] [2020-10-05 22:24:04,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:04,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935542022] [2020-10-05 22:24:04,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580951831] [2020-10-05 22:24:04,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:04,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-05 22:24:04,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:04,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 22:24:04,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:05,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:05,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 22:24:05,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207800905] [2020-10-05 22:24:05,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 22:24:05,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:05,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 22:24:05,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:24:05,013 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-05 22:24:05,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:05,533 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-05 22:24:05,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 22:24:05,534 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 22:24:05,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:05,535 INFO L225 Difference]: With dead ends: 124 [2020-10-05 22:24:05,535 INFO L226 Difference]: Without dead ends: 118 [2020-10-05 22:24:05,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 22:24:05,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-05 22:24:05,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-05 22:24:05,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 22:24:05,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 22:24:05,537 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 22:24:05,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:05,538 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 22:24:05,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 22:24:05,538 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 22:24:05,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 22:24:05,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:05,538 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:05,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:05,744 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:05,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:05,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-05 22:24:05,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:05,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588403385] [2020-10-05 22:24:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:06,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588403385] [2020-10-05 22:24:06,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389547632] [2020-10-05 22:24:06,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:06,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:24:06,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:06,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 22:24:06,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:06,131 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:24:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:06,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:06,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 22:24:06,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862226220] [2020-10-05 22:24:06,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 22:24:06,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:06,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 22:24:06,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:24:06,146 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 22:24:06,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:06,766 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-05 22:24:06,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:24:06,767 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 22:24:06,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:06,768 INFO L225 Difference]: With dead ends: 121 [2020-10-05 22:24:06,768 INFO L226 Difference]: Without dead ends: 115 [2020-10-05 22:24:06,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 22:24:06,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-05 22:24:06,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-05 22:24:06,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 22:24:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 22:24:06,771 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 22:24:06,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:06,771 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 22:24:06,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 22:24:06,771 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 22:24:06,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 22:24:06,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:06,772 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:06,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:06,980 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:06,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:06,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-05 22:24:06,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:06,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229153532] [2020-10-05 22:24:06,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:07,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229153532] [2020-10-05 22:24:07,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174457147] [2020-10-05 22:24:07,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:07,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-05 22:24:07,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:07,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 22:24:07,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:07,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:07,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 22:24:07,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068071405] [2020-10-05 22:24:07,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 22:24:07,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:07,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 22:24:07,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:24:07,340 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 22:24:07,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:07,935 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-05 22:24:07,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:24:07,936 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 22:24:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:07,936 INFO L225 Difference]: With dead ends: 118 [2020-10-05 22:24:07,936 INFO L226 Difference]: Without dead ends: 112 [2020-10-05 22:24:07,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 22:24:07,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-05 22:24:07,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-05 22:24:07,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 22:24:07,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 22:24:07,939 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 22:24:07,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:07,939 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 22:24:07,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 22:24:07,939 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 22:24:07,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 22:24:07,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:07,940 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:08,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:08,141 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:08,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:08,141 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-05 22:24:08,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:08,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260988739] [2020-10-05 22:24:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:08,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260988739] [2020-10-05 22:24:08,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637599695] [2020-10-05 22:24:08,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:08,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-05 22:24:08,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:08,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 22:24:08,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:08,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:24:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:08,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:08,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 22:24:08,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328083185] [2020-10-05 22:24:08,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 22:24:08,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:08,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 22:24:08,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:24:08,524 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 22:24:09,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:09,223 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-05 22:24:09,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 22:24:09,224 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 22:24:09,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:09,225 INFO L225 Difference]: With dead ends: 117 [2020-10-05 22:24:09,225 INFO L226 Difference]: Without dead ends: 111 [2020-10-05 22:24:09,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 22:24:09,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-05 22:24:09,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-05 22:24:09,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 22:24:09,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 22:24:09,228 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 22:24:09,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:09,228 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 22:24:09,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 22:24:09,228 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 22:24:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 22:24:09,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:09,228 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:09,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-05 22:24:09,429 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:09,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:09,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-05 22:24:09,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:09,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453391397] [2020-10-05 22:24:09,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:09,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453391397] [2020-10-05 22:24:09,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384085606] [2020-10-05 22:24:09,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:09,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 22:24:09,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:09,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:09,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 22:24:09,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258075563] [2020-10-05 22:24:09,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 22:24:09,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:09,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 22:24:09,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:24:09,773 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 22:24:10,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:10,424 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-05 22:24:10,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 22:24:10,425 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 22:24:10,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:10,426 INFO L225 Difference]: With dead ends: 114 [2020-10-05 22:24:10,426 INFO L226 Difference]: Without dead ends: 108 [2020-10-05 22:24:10,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 22:24:10,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-05 22:24:10,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-05 22:24:10,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 22:24:10,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 22:24:10,429 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 22:24:10,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:10,429 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 22:24:10,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 22:24:10,435 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 22:24:10,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 22:24:10,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:10,435 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:10,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-05 22:24:10,640 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:10,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:10,640 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-05 22:24:10,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:10,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556741056] [2020-10-05 22:24:10,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:10,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556741056] [2020-10-05 22:24:10,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650627293] [2020-10-05 22:24:10,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:10,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:24:10,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:10,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 22:24:10,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:10,988 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:24:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:11,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:11,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 22:24:11,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286876502] [2020-10-05 22:24:11,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 22:24:11,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:11,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 22:24:11,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:24:11,004 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 22:24:11,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:11,826 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-05 22:24:11,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:24:11,827 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 22:24:11,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:11,827 INFO L225 Difference]: With dead ends: 113 [2020-10-05 22:24:11,827 INFO L226 Difference]: Without dead ends: 107 [2020-10-05 22:24:11,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 22:24:11,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-05 22:24:11,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-05 22:24:11,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 22:24:11,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 22:24:11,830 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 22:24:11,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:11,830 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 22:24:11,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 22:24:11,830 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 22:24:11,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 22:24:11,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:11,831 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:12,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-05 22:24:12,039 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:12,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:12,040 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-05 22:24:12,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:12,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832386073] [2020-10-05 22:24:12,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:12,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832386073] [2020-10-05 22:24:12,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829541858] [2020-10-05 22:24:12,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:12,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-05 22:24:12,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:12,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 22:24:12,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:12,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:12,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 22:24:12,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677990865] [2020-10-05 22:24:12,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 22:24:12,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:12,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 22:24:12,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:24:12,382 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 22:24:13,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:13,120 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-05 22:24:13,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 22:24:13,121 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 22:24:13,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:13,122 INFO L225 Difference]: With dead ends: 110 [2020-10-05 22:24:13,122 INFO L226 Difference]: Without dead ends: 104 [2020-10-05 22:24:13,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 22:24:13,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-05 22:24:13,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-05 22:24:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 22:24:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 22:24:13,125 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 22:24:13,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:13,125 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 22:24:13,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 22:24:13,125 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 22:24:13,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 22:24:13,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:13,126 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:13,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-05 22:24:13,327 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:13,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:13,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-05 22:24:13,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:13,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113155399] [2020-10-05 22:24:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:13,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113155399] [2020-10-05 22:24:13,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203362557] [2020-10-05 22:24:13,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:13,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:24:13,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:13,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 22:24:13,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:13,670 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:24:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:13,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:13,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 22:24:13,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598037971] [2020-10-05 22:24:13,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 22:24:13,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:13,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 22:24:13,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:24:13,687 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 22:24:14,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:14,613 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-05 22:24:14,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 22:24:14,614 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 22:24:14,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:14,615 INFO L225 Difference]: With dead ends: 109 [2020-10-05 22:24:14,615 INFO L226 Difference]: Without dead ends: 103 [2020-10-05 22:24:14,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-05 22:24:14,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-05 22:24:14,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-05 22:24:14,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 22:24:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 22:24:14,617 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 22:24:14,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:14,617 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 22:24:14,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 22:24:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 22:24:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 22:24:14,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:14,618 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:14,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:14,819 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:14,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:14,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-05 22:24:14,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:14,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569908230] [2020-10-05 22:24:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:15,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569908230] [2020-10-05 22:24:15,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834538525] [2020-10-05 22:24:15,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:15,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-05 22:24:15,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:15,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 22:24:15,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:15,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:15,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 22:24:15,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814050017] [2020-10-05 22:24:15,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 22:24:15,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:15,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 22:24:15,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:24:15,151 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 22:24:15,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:15,950 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-05 22:24:15,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 22:24:15,951 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 22:24:15,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:15,951 INFO L225 Difference]: With dead ends: 106 [2020-10-05 22:24:15,952 INFO L226 Difference]: Without dead ends: 100 [2020-10-05 22:24:15,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 22:24:15,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-05 22:24:15,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-05 22:24:15,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 22:24:15,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 22:24:15,954 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 22:24:15,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:15,954 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 22:24:15,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 22:24:15,955 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 22:24:15,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 22:24:15,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:15,955 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:16,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-05 22:24:16,156 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:16,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:16,156 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-05 22:24:16,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:16,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60927234] [2020-10-05 22:24:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:16,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60927234] [2020-10-05 22:24:16,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463560207] [2020-10-05 22:24:16,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:16,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-05 22:24:16,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:16,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 22:24:16,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:16,496 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:24:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:16,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:16,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 22:24:16,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421185005] [2020-10-05 22:24:16,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 22:24:16,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:16,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 22:24:16,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:24:16,513 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 22:24:17,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:17,541 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-05 22:24:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 22:24:17,542 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 22:24:17,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:17,542 INFO L225 Difference]: With dead ends: 105 [2020-10-05 22:24:17,543 INFO L226 Difference]: Without dead ends: 99 [2020-10-05 22:24:17,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 22:24:17,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-05 22:24:17,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-05 22:24:17,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 22:24:17,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 22:24:17,545 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 22:24:17,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:17,545 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 22:24:17,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 22:24:17,545 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 22:24:17,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 22:24:17,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:17,545 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:17,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:17,746 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:17,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:17,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-05 22:24:17,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:17,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534416848] [2020-10-05 22:24:17,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:17,980 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:17,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534416848] [2020-10-05 22:24:17,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685818971] [2020-10-05 22:24:17,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:18,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 22:24:18,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:18,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:18,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 22:24:18,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958468660] [2020-10-05 22:24:18,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 22:24:18,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:18,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 22:24:18,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:24:18,064 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 22:24:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:18,937 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-05 22:24:18,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 22:24:18,938 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 22:24:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:18,939 INFO L225 Difference]: With dead ends: 102 [2020-10-05 22:24:18,939 INFO L226 Difference]: Without dead ends: 96 [2020-10-05 22:24:18,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-05 22:24:18,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-05 22:24:18,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-05 22:24:18,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 22:24:18,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 22:24:18,941 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 22:24:18,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:18,941 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 22:24:18,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 22:24:18,942 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 22:24:18,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 22:24:18,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:18,942 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:19,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:19,143 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:19,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:19,143 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-05 22:24:19,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:19,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977666714] [2020-10-05 22:24:19,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:19,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977666714] [2020-10-05 22:24:19,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921755194] [2020-10-05 22:24:19,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:19,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:24:19,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:19,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 22:24:19,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:19,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:24:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:19,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:19,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 22:24:19,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385318460] [2020-10-05 22:24:19,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 22:24:19,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:19,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 22:24:19,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:24:19,487 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 22:24:20,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:20,622 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-05 22:24:20,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 22:24:20,623 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 22:24:20,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:20,624 INFO L225 Difference]: With dead ends: 101 [2020-10-05 22:24:20,624 INFO L226 Difference]: Without dead ends: 95 [2020-10-05 22:24:20,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-05 22:24:20,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-05 22:24:20,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-05 22:24:20,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 22:24:20,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 22:24:20,626 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 22:24:20,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:20,626 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 22:24:20,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 22:24:20,627 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 22:24:20,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 22:24:20,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:20,627 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:20,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-05 22:24:20,828 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:20,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:20,828 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-05 22:24:20,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:20,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765661352] [2020-10-05 22:24:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:21,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765661352] [2020-10-05 22:24:21,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449117531] [2020-10-05 22:24:21,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:21,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-05 22:24:21,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:21,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 22:24:21,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:21,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:21,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 22:24:21,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741779125] [2020-10-05 22:24:21,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 22:24:21,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:21,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 22:24:21,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:24:21,119 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 22:24:22,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:22,065 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-05 22:24:22,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-05 22:24:22,066 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 22:24:22,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:22,066 INFO L225 Difference]: With dead ends: 98 [2020-10-05 22:24:22,067 INFO L226 Difference]: Without dead ends: 92 [2020-10-05 22:24:22,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 22:24:22,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-05 22:24:22,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-05 22:24:22,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 22:24:22,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 22:24:22,069 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 22:24:22,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:22,069 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 22:24:22,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 22:24:22,069 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 22:24:22,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 22:24:22,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:22,070 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:22,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:22,272 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:22,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:22,272 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-05 22:24:22,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:22,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533580872] [2020-10-05 22:24:22,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:22,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533580872] [2020-10-05 22:24:22,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175005697] [2020-10-05 22:24:22,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:22,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:24:22,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:22,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 22:24:22,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:22,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:24:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:22,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:22,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 22:24:22,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496856863] [2020-10-05 22:24:22,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 22:24:22,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:22,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 22:24:22,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:24:22,606 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 22:24:23,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:23,844 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-05 22:24:23,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-05 22:24:23,844 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 22:24:23,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:23,845 INFO L225 Difference]: With dead ends: 97 [2020-10-05 22:24:23,845 INFO L226 Difference]: Without dead ends: 91 [2020-10-05 22:24:23,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-05 22:24:23,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-05 22:24:23,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-05 22:24:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 22:24:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 22:24:23,848 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 22:24:23,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:23,848 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 22:24:23,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 22:24:23,848 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 22:24:23,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 22:24:23,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:23,849 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:24,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-05 22:24:24,049 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:24,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:24,050 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-05 22:24:24,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:24,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201166493] [2020-10-05 22:24:24,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:24,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201166493] [2020-10-05 22:24:24,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598260620] [2020-10-05 22:24:24,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:24,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-05 22:24:24,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:24,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 22:24:24,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:24,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:24,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 22:24:24,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841982285] [2020-10-05 22:24:24,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 22:24:24,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:24,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 22:24:24,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:24:24,355 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 22:24:25,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:25,364 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-05 22:24:25,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 22:24:25,365 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 22:24:25,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:25,365 INFO L225 Difference]: With dead ends: 113 [2020-10-05 22:24:25,366 INFO L226 Difference]: Without dead ends: 107 [2020-10-05 22:24:25,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-05 22:24:25,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-05 22:24:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-05 22:24:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-05 22:24:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-05 22:24:25,368 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-05 22:24:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:25,369 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-05 22:24:25,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 22:24:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-05 22:24:25,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 22:24:25,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:25,369 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:25,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-05 22:24:25,570 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:25,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:25,570 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-05 22:24:25,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:25,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439630232] [2020-10-05 22:24:25,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:25,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439630232] [2020-10-05 22:24:25,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981143834] [2020-10-05 22:24:25,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:25,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-05 22:24:25,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:25,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 22:24:25,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:25,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:24:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:25,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:25,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 22:24:25,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254148073] [2020-10-05 22:24:25,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 22:24:25,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:25,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 22:24:25,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:24:25,904 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-05 22:24:27,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:27,184 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-10-05 22:24:27,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-05 22:24:27,185 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 22:24:27,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:27,185 INFO L225 Difference]: With dead ends: 94 [2020-10-05 22:24:27,186 INFO L226 Difference]: Without dead ends: 86 [2020-10-05 22:24:27,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-10-05 22:24:27,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-05 22:24:27,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-10-05 22:24:27,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-05 22:24:27,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-05 22:24:27,188 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-05 22:24:27,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:27,188 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-05 22:24:27,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 22:24:27,188 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-05 22:24:27,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 22:24:27,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:27,189 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:27,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-05 22:24:27,389 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:27,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:27,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-05 22:24:27,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:27,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147923514] [2020-10-05 22:24:27,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:27,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147923514] [2020-10-05 22:24:27,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792139215] [2020-10-05 22:24:27,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:27,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 22:24:27,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:27,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:24:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:27,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:27,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 22:24:27,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709129308] [2020-10-05 22:24:27,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 22:24:27,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:27,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 22:24:27,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:24:27,730 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-05 22:24:28,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:28,940 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-05 22:24:28,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 22:24:28,940 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 22:24:28,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:28,941 INFO L225 Difference]: With dead ends: 108 [2020-10-05 22:24:28,941 INFO L226 Difference]: Without dead ends: 103 [2020-10-05 22:24:28,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-05 22:24:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-05 22:24:28,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-05 22:24:28,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-05 22:24:28,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-05 22:24:28,944 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-05 22:24:28,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:28,944 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-05 22:24:28,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 22:24:28,944 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-05 22:24:28,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 22:24:28,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:28,945 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:29,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-05 22:24:29,145 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:29,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:29,148 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-05 22:24:29,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:29,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541104734] [2020-10-05 22:24:29,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:29,398 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:29,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541104734] [2020-10-05 22:24:29,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126106583] [2020-10-05 22:24:29,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:29,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:24:29,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:29,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 22:24:29,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:29,490 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:24:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:29,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:29,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 22:24:29,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272461818] [2020-10-05 22:24:29,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 22:24:29,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:29,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 22:24:29,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:24:29,515 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-05 22:24:30,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:30,816 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-05 22:24:30,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 22:24:30,817 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 22:24:30,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:30,818 INFO L225 Difference]: With dead ends: 90 [2020-10-05 22:24:30,818 INFO L226 Difference]: Without dead ends: 85 [2020-10-05 22:24:30,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-05 22:24:30,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-05 22:24:30,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-05 22:24:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 22:24:30,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-05 22:24:30,821 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-05 22:24:30,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:30,821 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-05 22:24:30,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 22:24:30,821 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-05 22:24:30,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 22:24:30,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:30,822 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:31,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:31,022 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:31,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:31,023 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-05 22:24:31,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:31,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071882611] [2020-10-05 22:24:31,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:31,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071882611] [2020-10-05 22:24:31,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284351794] [2020-10-05 22:24:31,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:31,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 22:24:31,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:31,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 22:24:31,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:31,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:31,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 22:24:31,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22978273] [2020-10-05 22:24:31,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 22:24:31,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:31,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 22:24:31,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:24:31,433 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-05 22:24:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:32,003 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-05 22:24:32,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 22:24:32,004 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 22:24:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:32,004 INFO L225 Difference]: With dead ends: 96 [2020-10-05 22:24:32,005 INFO L226 Difference]: Without dead ends: 90 [2020-10-05 22:24:32,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-05 22:24:32,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-05 22:24:32,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-05 22:24:32,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-05 22:24:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-05 22:24:32,007 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-05 22:24:32,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:32,007 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-05 22:24:32,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 22:24:32,007 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-05 22:24:32,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 22:24:32,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:32,008 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:32,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:32,208 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:32,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:32,209 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-05 22:24:32,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:32,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79959530] [2020-10-05 22:24:32,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:32,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79959530] [2020-10-05 22:24:32,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180945288] [2020-10-05 22:24:32,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:32,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:24:32,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:32,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 22:24:32,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:32,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:24:32,638 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:32,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:32,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 22:24:32,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25384547] [2020-10-05 22:24:32,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 22:24:32,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:32,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 22:24:32,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:24:32,639 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-05 22:24:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:33,259 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-05 22:24:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:24:33,260 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 22:24:33,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:33,260 INFO L225 Difference]: With dead ends: 114 [2020-10-05 22:24:33,260 INFO L226 Difference]: Without dead ends: 108 [2020-10-05 22:24:33,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 22:24:33,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-05 22:24:33,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-05 22:24:33,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 22:24:33,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-05 22:24:33,263 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-05 22:24:33,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:33,263 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-05 22:24:33,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 22:24:33,263 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-05 22:24:33,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 22:24:33,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:33,264 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:33,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:33,464 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:33,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:33,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-05 22:24:33,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:33,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225450706] [2020-10-05 22:24:33,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:33,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225450706] [2020-10-05 22:24:33,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163186630] [2020-10-05 22:24:33,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:33,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-05 22:24:33,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:33,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 22:24:33,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:33,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:33,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 22:24:33,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863778504] [2020-10-05 22:24:33,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 22:24:33,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:33,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 22:24:33,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:24:33,870 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-05 22:24:34,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:34,541 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-05 22:24:34,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 22:24:34,542 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 22:24:34,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:34,542 INFO L225 Difference]: With dead ends: 115 [2020-10-05 22:24:34,543 INFO L226 Difference]: Without dead ends: 109 [2020-10-05 22:24:34,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 22:24:34,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-05 22:24:34,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-05 22:24:34,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-05 22:24:34,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-05 22:24:34,545 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-05 22:24:34,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:34,546 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-05 22:24:34,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 22:24:34,546 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-05 22:24:34,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 22:24:34,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:34,546 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:34,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:34,747 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:34,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:34,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-05 22:24:34,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:34,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998403186] [2020-10-05 22:24:34,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:35,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998403186] [2020-10-05 22:24:35,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785800212] [2020-10-05 22:24:35,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:35,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 22:24:35,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:35,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 22:24:35,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:35,168 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:24:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:35,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:35,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 22:24:35,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357508753] [2020-10-05 22:24:35,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 22:24:35,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:35,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 22:24:35,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:24:35,182 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-05 22:24:35,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:35,866 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-05 22:24:35,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 22:24:35,866 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 22:24:35,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:35,867 INFO L225 Difference]: With dead ends: 129 [2020-10-05 22:24:35,867 INFO L226 Difference]: Without dead ends: 123 [2020-10-05 22:24:35,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 22:24:35,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-05 22:24:35,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-05 22:24:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-05 22:24:35,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-05 22:24:35,870 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-05 22:24:35,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:35,870 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-05 22:24:35,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 22:24:35,871 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-05 22:24:35,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 22:24:35,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:35,871 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:36,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:36,080 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:36,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:36,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-05 22:24:36,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:36,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863458464] [2020-10-05 22:24:36,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:36,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863458464] [2020-10-05 22:24:36,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130920355] [2020-10-05 22:24:36,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:36,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 22:24:36,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:36,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:36,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 22:24:36,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726655372] [2020-10-05 22:24:36,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 22:24:36,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:36,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 22:24:36,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:24:36,460 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-05 22:24:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:37,184 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-05 22:24:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 22:24:37,185 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 22:24:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:37,186 INFO L225 Difference]: With dead ends: 129 [2020-10-05 22:24:37,186 INFO L226 Difference]: Without dead ends: 123 [2020-10-05 22:24:37,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 22:24:37,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-05 22:24:37,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-05 22:24:37,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-05 22:24:37,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-05 22:24:37,189 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-05 22:24:37,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:37,189 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-05 22:24:37,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 22:24:37,189 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-05 22:24:37,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 22:24:37,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:37,189 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:37,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:37,390 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:37,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:37,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-05 22:24:37,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:37,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272698595] [2020-10-05 22:24:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:37,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272698595] [2020-10-05 22:24:37,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253525730] [2020-10-05 22:24:37,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:37,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:24:37,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:37,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 22:24:37,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:37,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:24:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:37,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:37,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 22:24:37,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91532420] [2020-10-05 22:24:37,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 22:24:37,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:37,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 22:24:37,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:24:37,808 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-05 22:24:38,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:38,630 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-05 22:24:38,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:24:38,631 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 22:24:38,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:38,632 INFO L225 Difference]: With dead ends: 126 [2020-10-05 22:24:38,632 INFO L226 Difference]: Without dead ends: 120 [2020-10-05 22:24:38,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 22:24:38,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-05 22:24:38,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-05 22:24:38,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-05 22:24:38,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-05 22:24:38,634 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-05 22:24:38,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:38,635 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-05 22:24:38,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 22:24:38,635 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-05 22:24:38,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 22:24:38,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:38,635 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:38,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:38,836 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:38,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:38,837 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-05 22:24:38,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:38,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277761558] [2020-10-05 22:24:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:39,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277761558] [2020-10-05 22:24:39,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514772965] [2020-10-05 22:24:39,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:39,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 22:24:39,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:39,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 22:24:39,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:39,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:39,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 22:24:39,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224767994] [2020-10-05 22:24:39,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 22:24:39,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:39,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 22:24:39,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:24:39,215 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-05 22:24:40,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:40,001 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-05 22:24:40,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 22:24:40,001 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 22:24:40,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:40,002 INFO L225 Difference]: With dead ends: 127 [2020-10-05 22:24:40,002 INFO L226 Difference]: Without dead ends: 121 [2020-10-05 22:24:40,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-05 22:24:40,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-05 22:24:40,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-05 22:24:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 22:24:40,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-05 22:24:40,004 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-05 22:24:40,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:40,004 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-05 22:24:40,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 22:24:40,004 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-05 22:24:40,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 22:24:40,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:40,004 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:40,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-05 22:24:40,205 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:40,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:40,205 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-05 22:24:40,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:40,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847453013] [2020-10-05 22:24:40,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:40,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847453013] [2020-10-05 22:24:40,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623816649] [2020-10-05 22:24:40,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:40,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:24:40,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:40,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 22:24:40,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:40,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:24:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:40,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:40,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 22:24:40,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218606470] [2020-10-05 22:24:40,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 22:24:40,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:40,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 22:24:40,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:24:40,613 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-05 22:24:41,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:41,540 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-05 22:24:41,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 22:24:41,540 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 22:24:41,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:41,541 INFO L225 Difference]: With dead ends: 124 [2020-10-05 22:24:41,541 INFO L226 Difference]: Without dead ends: 118 [2020-10-05 22:24:41,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-05 22:24:41,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-05 22:24:41,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-05 22:24:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 22:24:41,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-05 22:24:41,544 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-05 22:24:41,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:41,544 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-05 22:24:41,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 22:24:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-05 22:24:41,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 22:24:41,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:41,544 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:41,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-05 22:24:41,746 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:41,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:41,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-05 22:24:41,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:41,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238339470] [2020-10-05 22:24:41,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:42,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238339470] [2020-10-05 22:24:42,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289954486] [2020-10-05 22:24:42,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:42,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-05 22:24:42,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:42,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 22:24:42,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:42,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:42,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 22:24:42,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243612771] [2020-10-05 22:24:42,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 22:24:42,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:42,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 22:24:42,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:24:42,127 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-05 22:24:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:42,968 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-05 22:24:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 22:24:42,969 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 22:24:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:42,969 INFO L225 Difference]: With dead ends: 125 [2020-10-05 22:24:42,969 INFO L226 Difference]: Without dead ends: 119 [2020-10-05 22:24:42,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 22:24:42,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-05 22:24:42,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-05 22:24:42,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-05 22:24:42,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-05 22:24:42,971 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-05 22:24:42,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:42,971 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-05 22:24:42,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 22:24:42,972 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-05 22:24:42,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 22:24:42,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:42,972 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:43,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-05 22:24:43,173 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:43,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:43,174 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-05 22:24:43,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:43,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446278858] [2020-10-05 22:24:43,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:43,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446278858] [2020-10-05 22:24:43,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304462079] [2020-10-05 22:24:43,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:43,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 22:24:43,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:43,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 22:24:43,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:43,542 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:24:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:43,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:43,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 22:24:43,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904850316] [2020-10-05 22:24:43,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 22:24:43,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:43,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 22:24:43,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:24:43,559 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-05 22:24:44,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:44,581 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-05 22:24:44,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 22:24:44,582 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 22:24:44,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:44,583 INFO L225 Difference]: With dead ends: 122 [2020-10-05 22:24:44,583 INFO L226 Difference]: Without dead ends: 116 [2020-10-05 22:24:44,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 22:24:44,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-05 22:24:44,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-05 22:24:44,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-05 22:24:44,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-05 22:24:44,586 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-05 22:24:44,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:44,586 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-05 22:24:44,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 22:24:44,586 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-05 22:24:44,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 22:24:44,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:44,586 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:44,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-05 22:24:44,787 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:44,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:44,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-05 22:24:44,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:44,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761719101] [2020-10-05 22:24:44,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:45,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761719101] [2020-10-05 22:24:45,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955602362] [2020-10-05 22:24:45,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:45,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 22:24:45,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:45,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:45,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 22:24:45,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626049259] [2020-10-05 22:24:45,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 22:24:45,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:45,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 22:24:45,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:24:45,137 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-05 22:24:46,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:46,066 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-05 22:24:46,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-05 22:24:46,067 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 22:24:46,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:46,067 INFO L225 Difference]: With dead ends: 123 [2020-10-05 22:24:46,067 INFO L226 Difference]: Without dead ends: 117 [2020-10-05 22:24:46,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-05 22:24:46,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-05 22:24:46,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-05 22:24:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-05 22:24:46,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-05 22:24:46,069 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-05 22:24:46,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:46,069 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-05 22:24:46,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 22:24:46,069 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-05 22:24:46,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 22:24:46,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:46,070 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:46,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:46,271 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:46,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:46,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-05 22:24:46,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:46,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684967401] [2020-10-05 22:24:46,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:46,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684967401] [2020-10-05 22:24:46,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744993315] [2020-10-05 22:24:46,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:46,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:24:46,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:46,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 22:24:46,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:46,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:24:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:46,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:46,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 22:24:46,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428491738] [2020-10-05 22:24:46,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 22:24:46,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:46,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 22:24:46,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:24:46,647 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-05 22:24:47,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:47,766 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-05 22:24:47,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 22:24:47,768 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 22:24:47,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:47,768 INFO L225 Difference]: With dead ends: 120 [2020-10-05 22:24:47,768 INFO L226 Difference]: Without dead ends: 114 [2020-10-05 22:24:47,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-05 22:24:47,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-05 22:24:47,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-05 22:24:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-05 22:24:47,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-05 22:24:47,771 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-05 22:24:47,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:47,771 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-05 22:24:47,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 22:24:47,772 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-05 22:24:47,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 22:24:47,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:47,772 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:47,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:47,973 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:47,973 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-05 22:24:47,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:47,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049259631] [2020-10-05 22:24:47,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:48,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049259631] [2020-10-05 22:24:48,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896447209] [2020-10-05 22:24:48,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:48,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 22:24:48,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:48,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 22:24:48,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:48,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:48,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 22:24:48,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750552745] [2020-10-05 22:24:48,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 22:24:48,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:48,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 22:24:48,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:24:48,330 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-05 22:24:49,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:49,318 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-05 22:24:49,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 22:24:49,319 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 22:24:49,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:49,320 INFO L225 Difference]: With dead ends: 121 [2020-10-05 22:24:49,320 INFO L226 Difference]: Without dead ends: 115 [2020-10-05 22:24:49,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-05 22:24:49,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-05 22:24:49,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-05 22:24:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 22:24:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 22:24:49,323 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-05 22:24:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:49,323 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 22:24:49,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 22:24:49,323 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 22:24:49,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 22:24:49,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:49,324 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:49,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-05 22:24:49,525 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:49,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:49,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-05 22:24:49,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:49,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834138471] [2020-10-05 22:24:49,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:49,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834138471] [2020-10-05 22:24:49,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041549886] [2020-10-05 22:24:49,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:49,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:24:49,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:49,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 22:24:49,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:49,878 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:24:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:49,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:49,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 22:24:49,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233122714] [2020-10-05 22:24:49,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 22:24:49,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:49,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 22:24:49,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:24:49,906 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-05 22:24:51,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:51,169 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-05 22:24:51,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-05 22:24:51,174 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 22:24:51,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:51,175 INFO L225 Difference]: With dead ends: 118 [2020-10-05 22:24:51,175 INFO L226 Difference]: Without dead ends: 112 [2020-10-05 22:24:51,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-05 22:24:51,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-05 22:24:51,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-05 22:24:51,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 22:24:51,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 22:24:51,177 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-05 22:24:51,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:51,177 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 22:24:51,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 22:24:51,177 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 22:24:51,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 22:24:51,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:51,177 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:51,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:51,378 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:51,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:51,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-05 22:24:51,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:51,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039425131] [2020-10-05 22:24:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:51,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039425131] [2020-10-05 22:24:51,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743695586] [2020-10-05 22:24:51,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:51,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-05 22:24:51,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:51,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 22:24:51,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:51,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:51,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 22:24:51,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444101752] [2020-10-05 22:24:51,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 22:24:51,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:51,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 22:24:51,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:24:51,765 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-05 22:24:52,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:52,844 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-05 22:24:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-05 22:24:52,845 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 22:24:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:52,846 INFO L225 Difference]: With dead ends: 119 [2020-10-05 22:24:52,846 INFO L226 Difference]: Without dead ends: 113 [2020-10-05 22:24:52,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-05 22:24:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-05 22:24:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-05 22:24:52,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-05 22:24:52,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-05 22:24:52,850 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-05 22:24:52,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:52,851 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-05 22:24:52,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 22:24:52,851 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-05 22:24:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 22:24:52,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:52,851 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:53,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:53,052 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:53,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:53,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-05 22:24:53,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:53,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409656883] [2020-10-05 22:24:53,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:53,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409656883] [2020-10-05 22:24:53,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316892595] [2020-10-05 22:24:53,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:53,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 22:24:53,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:53,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 22:24:53,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:53,407 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:24:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:53,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:53,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 22:24:53,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332446695] [2020-10-05 22:24:53,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 22:24:53,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:53,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 22:24:53,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:24:53,428 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-05 22:24:54,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:54,751 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-05 22:24:54,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-05 22:24:54,752 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 22:24:54,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:54,752 INFO L225 Difference]: With dead ends: 116 [2020-10-05 22:24:54,752 INFO L226 Difference]: Without dead ends: 110 [2020-10-05 22:24:54,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-05 22:24:54,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-05 22:24:54,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-05 22:24:54,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-05 22:24:54,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-05 22:24:54,755 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-05 22:24:54,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:54,755 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-05 22:24:54,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 22:24:54,755 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-05 22:24:54,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 22:24:54,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:54,756 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:54,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:54,956 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:54,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:54,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-05 22:24:54,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:54,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935697911] [2020-10-05 22:24:54,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:55,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935697911] [2020-10-05 22:24:55,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999968706] [2020-10-05 22:24:55,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:55,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 22:24:55,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:55,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:55,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 22:24:55,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508421780] [2020-10-05 22:24:55,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 22:24:55,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:55,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 22:24:55,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:24:55,291 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-05 22:24:56,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:56,438 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-05 22:24:56,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-05 22:24:56,439 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 22:24:56,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:56,440 INFO L225 Difference]: With dead ends: 136 [2020-10-05 22:24:56,440 INFO L226 Difference]: Without dead ends: 130 [2020-10-05 22:24:56,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-05 22:24:56,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-05 22:24:56,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-05 22:24:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-05 22:24:56,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-05 22:24:56,443 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-05 22:24:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:56,443 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-05 22:24:56,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 22:24:56,443 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-05 22:24:56,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 22:24:56,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:56,444 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:56,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:56,651 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:56,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:56,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-05 22:24:56,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:56,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119442313] [2020-10-05 22:24:56,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:56,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119442313] [2020-10-05 22:24:56,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958433951] [2020-10-05 22:24:56,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:56,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:24:56,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:56,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 22:24:56,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:56,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:24:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:57,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:57,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 22:24:57,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153308031] [2020-10-05 22:24:57,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 22:24:57,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:57,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 22:24:57,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:24:57,014 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-05 22:24:58,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:58,381 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-05 22:24:58,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-05 22:24:58,382 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 22:24:58,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:58,382 INFO L225 Difference]: With dead ends: 117 [2020-10-05 22:24:58,383 INFO L226 Difference]: Without dead ends: 109 [2020-10-05 22:24:58,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-05 22:24:58,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-05 22:24:58,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-05 22:24:58,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-05 22:24:58,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-05 22:24:58,385 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-05 22:24:58,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:58,385 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-05 22:24:58,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 22:24:58,386 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-05 22:24:58,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 22:24:58,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:58,386 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:58,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:58,587 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:58,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:58,587 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-05 22:24:58,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:58,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565070597] [2020-10-05 22:24:58,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:24:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:58,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565070597] [2020-10-05 22:24:58,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650484029] [2020-10-05 22:24:58,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:24:59,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 22:24:59,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:24:59,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 22:24:59,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:24:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:24:59,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:24:59,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 22:24:59,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042807838] [2020-10-05 22:24:59,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 22:24:59,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:24:59,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 22:24:59,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:24:59,043 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-05 22:24:59,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:24:59,709 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-05 22:24:59,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:24:59,710 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 22:24:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:24:59,710 INFO L225 Difference]: With dead ends: 134 [2020-10-05 22:24:59,710 INFO L226 Difference]: Without dead ends: 128 [2020-10-05 22:24:59,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 22:24:59,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-05 22:24:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-05 22:24:59,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 22:24:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 22:24:59,713 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 22:24:59,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:24:59,713 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 22:24:59,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 22:24:59,713 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 22:24:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 22:24:59,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:24:59,713 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:24:59,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-05 22:24:59,914 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:24:59,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:24:59,915 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-05 22:24:59,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:24:59,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566823521] [2020-10-05 22:24:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:24:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:00,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566823521] [2020-10-05 22:25:00,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708875714] [2020-10-05 22:25:00,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:00,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:25:00,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:00,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 22:25:00,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:00,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:25:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:00,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:00,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 22:25:00,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254251402] [2020-10-05 22:25:00,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:25:00,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:00,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:25:00,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:25:00,403 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 22:25:01,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:01,155 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-05 22:25:01,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 22:25:01,156 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 22:25:01,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:01,156 INFO L225 Difference]: With dead ends: 131 [2020-10-05 22:25:01,156 INFO L226 Difference]: Without dead ends: 125 [2020-10-05 22:25:01,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 22:25:01,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-05 22:25:01,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-05 22:25:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 22:25:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 22:25:01,159 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 22:25:01,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:01,159 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 22:25:01,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:25:01,159 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 22:25:01,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 22:25:01,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:01,160 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:01,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-05 22:25:01,360 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:01,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:01,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-05 22:25:01,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:01,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976097804] [2020-10-05 22:25:01,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:01,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976097804] [2020-10-05 22:25:01,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898246428] [2020-10-05 22:25:01,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:01,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-05 22:25:01,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:01,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 22:25:01,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:01,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:01,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 22:25:01,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048006475] [2020-10-05 22:25:01,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 22:25:01,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:01,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 22:25:01,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:25:01,803 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 22:25:02,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:02,534 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-05 22:25:02,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 22:25:02,535 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 22:25:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:02,536 INFO L225 Difference]: With dead ends: 128 [2020-10-05 22:25:02,536 INFO L226 Difference]: Without dead ends: 122 [2020-10-05 22:25:02,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 22:25:02,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-05 22:25:02,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-05 22:25:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 22:25:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 22:25:02,539 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 22:25:02,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:02,539 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 22:25:02,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 22:25:02,540 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 22:25:02,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 22:25:02,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:02,540 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:02,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:02,741 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:02,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:02,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-05 22:25:02,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:02,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892146627] [2020-10-05 22:25:02,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:03,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892146627] [2020-10-05 22:25:03,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932080640] [2020-10-05 22:25:03,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:03,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 22:25:03,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:03,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 22:25:03,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:03,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:25:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:03,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:03,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 22:25:03,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41135860] [2020-10-05 22:25:03,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:25:03,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:03,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:25:03,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:25:03,208 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 22:25:04,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:04,059 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-05 22:25:04,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:25:04,060 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 22:25:04,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:04,061 INFO L225 Difference]: With dead ends: 127 [2020-10-05 22:25:04,061 INFO L226 Difference]: Without dead ends: 121 [2020-10-05 22:25:04,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-05 22:25:04,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-05 22:25:04,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-05 22:25:04,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 22:25:04,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 22:25:04,064 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 22:25:04,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:04,064 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 22:25:04,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:25:04,064 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 22:25:04,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 22:25:04,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:04,064 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:04,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-05 22:25:04,265 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:04,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:04,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-05 22:25:04,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:04,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641731007] [2020-10-05 22:25:04,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:04,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641731007] [2020-10-05 22:25:04,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973232530] [2020-10-05 22:25:04,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:04,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 22:25:04,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:04,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:04,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 22:25:04,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478422175] [2020-10-05 22:25:04,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 22:25:04,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:04,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 22:25:04,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:25:04,687 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 22:25:05,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:05,484 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-05 22:25:05,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 22:25:05,485 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 22:25:05,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:05,486 INFO L225 Difference]: With dead ends: 124 [2020-10-05 22:25:05,486 INFO L226 Difference]: Without dead ends: 118 [2020-10-05 22:25:05,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 22:25:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-05 22:25:05,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-05 22:25:05,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 22:25:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 22:25:05,488 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 22:25:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:05,489 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 22:25:05,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 22:25:05,489 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 22:25:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 22:25:05,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:05,489 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:05,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:05,690 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:05,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:05,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-05 22:25:05,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:05,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467931418] [2020-10-05 22:25:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:06,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467931418] [2020-10-05 22:25:06,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595221896] [2020-10-05 22:25:06,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:06,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:25:06,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:06,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 22:25:06,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:06,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:25:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:06,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:06,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 22:25:06,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257581169] [2020-10-05 22:25:06,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:25:06,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:06,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:25:06,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:25:06,134 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 22:25:07,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:07,124 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-05 22:25:07,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 22:25:07,125 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 22:25:07,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:07,125 INFO L225 Difference]: With dead ends: 123 [2020-10-05 22:25:07,126 INFO L226 Difference]: Without dead ends: 117 [2020-10-05 22:25:07,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 22:25:07,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-05 22:25:07,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-05 22:25:07,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 22:25:07,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 22:25:07,128 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 22:25:07,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:07,129 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 22:25:07,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:25:07,129 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 22:25:07,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 22:25:07,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:07,129 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:07,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:07,330 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:07,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:07,331 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-05 22:25:07,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:07,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187698765] [2020-10-05 22:25:07,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:07,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187698765] [2020-10-05 22:25:07,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842313080] [2020-10-05 22:25:07,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:07,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 22:25:07,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:07,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 22:25:07,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:07,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:07,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 22:25:07,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996313823] [2020-10-05 22:25:07,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 22:25:07,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:07,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 22:25:07,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:25:07,727 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 22:25:08,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:08,603 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-05 22:25:08,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 22:25:08,605 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 22:25:08,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:08,605 INFO L225 Difference]: With dead ends: 120 [2020-10-05 22:25:08,605 INFO L226 Difference]: Without dead ends: 114 [2020-10-05 22:25:08,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-05 22:25:08,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-05 22:25:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-05 22:25:08,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 22:25:08,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 22:25:08,608 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 22:25:08,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:08,608 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 22:25:08,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 22:25:08,608 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 22:25:08,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 22:25:08,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:08,609 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:08,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:08,809 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:08,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:08,810 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-05 22:25:08,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:08,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325772471] [2020-10-05 22:25:08,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:09,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325772471] [2020-10-05 22:25:09,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840865424] [2020-10-05 22:25:09,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:09,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:25:09,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:09,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 22:25:09,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:09,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:25:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:09,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:09,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 22:25:09,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848940468] [2020-10-05 22:25:09,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:25:09,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:09,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:25:09,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:25:09,244 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 22:25:10,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:10,333 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-05 22:25:10,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 22:25:10,334 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 22:25:10,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:10,335 INFO L225 Difference]: With dead ends: 119 [2020-10-05 22:25:10,335 INFO L226 Difference]: Without dead ends: 113 [2020-10-05 22:25:10,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-05 22:25:10,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-05 22:25:10,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-05 22:25:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 22:25:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 22:25:10,340 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 22:25:10,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:10,340 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 22:25:10,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:25:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 22:25:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 22:25:10,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:10,341 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:10,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:10,550 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:10,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:10,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-05 22:25:10,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:10,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601589027] [2020-10-05 22:25:10,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:10,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601589027] [2020-10-05 22:25:10,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877419139] [2020-10-05 22:25:10,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:10,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-05 22:25:10,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:10,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 22:25:10,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:10,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:10,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 22:25:10,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611257873] [2020-10-05 22:25:10,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 22:25:10,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:10,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 22:25:10,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:25:10,949 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 22:25:11,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:11,908 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-05 22:25:11,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 22:25:11,909 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 22:25:11,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:11,910 INFO L225 Difference]: With dead ends: 116 [2020-10-05 22:25:11,910 INFO L226 Difference]: Without dead ends: 110 [2020-10-05 22:25:11,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 22:25:11,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-05 22:25:11,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-05 22:25:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 22:25:11,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 22:25:11,913 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 22:25:11,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:11,913 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 22:25:11,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 22:25:11,913 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 22:25:11,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 22:25:11,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:11,914 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:12,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-05 22:25:12,115 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:12,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:12,115 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-05 22:25:12,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:12,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088511741] [2020-10-05 22:25:12,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:12,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088511741] [2020-10-05 22:25:12,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768494038] [2020-10-05 22:25:12,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:12,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 22:25:12,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:12,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 22:25:12,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:12,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:25:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:12,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:12,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 22:25:12,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36379847] [2020-10-05 22:25:12,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:25:12,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:12,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:25:12,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:25:12,541 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 22:25:13,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:13,734 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-05 22:25:13,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 22:25:13,735 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 22:25:13,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:13,736 INFO L225 Difference]: With dead ends: 115 [2020-10-05 22:25:13,736 INFO L226 Difference]: Without dead ends: 109 [2020-10-05 22:25:13,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-05 22:25:13,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-05 22:25:13,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-05 22:25:13,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 22:25:13,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 22:25:13,739 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 22:25:13,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:13,739 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 22:25:13,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:25:13,739 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 22:25:13,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 22:25:13,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:13,740 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:13,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:13,948 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:13,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:13,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-05 22:25:13,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:13,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308931924] [2020-10-05 22:25:13,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:14,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308931924] [2020-10-05 22:25:14,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809423012] [2020-10-05 22:25:14,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:14,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 22:25:14,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:14,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:14,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 22:25:14,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400282304] [2020-10-05 22:25:14,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 22:25:14,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:14,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 22:25:14,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:25:14,340 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 22:25:15,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:15,362 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-05 22:25:15,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-05 22:25:15,363 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 22:25:15,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:15,363 INFO L225 Difference]: With dead ends: 112 [2020-10-05 22:25:15,364 INFO L226 Difference]: Without dead ends: 106 [2020-10-05 22:25:15,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-05 22:25:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-05 22:25:15,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-05 22:25:15,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 22:25:15,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 22:25:15,366 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 22:25:15,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:15,366 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 22:25:15,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 22:25:15,366 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 22:25:15,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 22:25:15,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:15,367 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:15,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-05 22:25:15,568 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:15,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:15,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-05 22:25:15,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:15,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426118975] [2020-10-05 22:25:15,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:15,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426118975] [2020-10-05 22:25:15,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362606606] [2020-10-05 22:25:15,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:15,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:25:15,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:15,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 22:25:15,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:15,957 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:25:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:15,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:15,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 22:25:15,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969980369] [2020-10-05 22:25:15,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:25:15,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:15,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:25:15,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:25:15,979 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 22:25:17,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:17,274 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-05 22:25:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-05 22:25:17,275 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 22:25:17,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:17,276 INFO L225 Difference]: With dead ends: 111 [2020-10-05 22:25:17,276 INFO L226 Difference]: Without dead ends: 105 [2020-10-05 22:25:17,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-05 22:25:17,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-05 22:25:17,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-05 22:25:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 22:25:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 22:25:17,284 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 22:25:17,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:17,284 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 22:25:17,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:25:17,284 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 22:25:17,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 22:25:17,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:17,284 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:17,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-05 22:25:17,485 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:17,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:17,486 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-05 22:25:17,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:17,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546693755] [2020-10-05 22:25:17,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:17,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546693755] [2020-10-05 22:25:17,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740422862] [2020-10-05 22:25:17,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:17,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 22:25:17,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:17,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 22:25:17,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:17,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:17,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 22:25:17,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735065284] [2020-10-05 22:25:17,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 22:25:17,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:17,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 22:25:17,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:25:17,865 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 22:25:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:18,961 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-05 22:25:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 22:25:18,962 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 22:25:18,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:18,962 INFO L225 Difference]: With dead ends: 108 [2020-10-05 22:25:18,962 INFO L226 Difference]: Without dead ends: 102 [2020-10-05 22:25:18,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-05 22:25:18,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-05 22:25:18,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-05 22:25:18,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 22:25:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 22:25:18,965 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 22:25:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:18,965 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 22:25:18,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 22:25:18,966 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 22:25:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 22:25:18,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:18,966 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:19,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:19,171 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:19,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:19,172 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-05 22:25:19,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:19,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145854747] [2020-10-05 22:25:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:19,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145854747] [2020-10-05 22:25:19,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023823136] [2020-10-05 22:25:19,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:19,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:25:19,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:19,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 22:25:19,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:19,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:25:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:19,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:19,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 22:25:19,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829532028] [2020-10-05 22:25:19,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:25:19,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:19,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:25:19,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:25:19,584 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 22:25:21,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:21,015 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-05 22:25:21,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-05 22:25:21,016 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 22:25:21,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:21,016 INFO L225 Difference]: With dead ends: 107 [2020-10-05 22:25:21,017 INFO L226 Difference]: Without dead ends: 101 [2020-10-05 22:25:21,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-05 22:25:21,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-05 22:25:21,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-05 22:25:21,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 22:25:21,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 22:25:21,020 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 22:25:21,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:21,020 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 22:25:21,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:25:21,020 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 22:25:21,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 22:25:21,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:21,021 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:21,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:21,225 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:21,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:21,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-05 22:25:21,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:21,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284790835] [2020-10-05 22:25:21,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:21,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284790835] [2020-10-05 22:25:21,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101126384] [2020-10-05 22:25:21,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:21,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-05 22:25:21,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:21,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 22:25:21,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:21,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:21,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 22:25:21,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628708324] [2020-10-05 22:25:21,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 22:25:21,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:21,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 22:25:21,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:25:21,611 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 22:25:22,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:22,824 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-05 22:25:22,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-05 22:25:22,825 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 22:25:22,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:22,825 INFO L225 Difference]: With dead ends: 104 [2020-10-05 22:25:22,826 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 22:25:22,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-05 22:25:22,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 22:25:22,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-05 22:25:22,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 22:25:22,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 22:25:22,828 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 22:25:22,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:22,829 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 22:25:22,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 22:25:22,829 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 22:25:22,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 22:25:22,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:22,829 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:23,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:23,030 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:23,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:23,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-05 22:25:23,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:23,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189534666] [2020-10-05 22:25:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:23,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189534666] [2020-10-05 22:25:23,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413544167] [2020-10-05 22:25:23,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:23,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 22:25:23,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:23,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 22:25:23,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:23,424 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:25:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:23,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:23,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 22:25:23,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240871671] [2020-10-05 22:25:23,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:25:23,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:23,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:25:23,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:25:23,446 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 22:25:25,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:25,019 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-05 22:25:25,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-05 22:25:25,020 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 22:25:25,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:25,021 INFO L225 Difference]: With dead ends: 103 [2020-10-05 22:25:25,021 INFO L226 Difference]: Without dead ends: 97 [2020-10-05 22:25:25,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-05 22:25:25,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-05 22:25:25,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-05 22:25:25,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 22:25:25,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 22:25:25,023 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 22:25:25,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:25,023 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 22:25:25,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:25:25,023 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 22:25:25,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 22:25:25,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:25,024 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:25,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-05 22:25:25,224 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:25,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:25,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-05 22:25:25,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:25,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923884620] [2020-10-05 22:25:25,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:25,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923884620] [2020-10-05 22:25:25,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206734948] [2020-10-05 22:25:25,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:25,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 22:25:25,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:25,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:25,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 22:25:25,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972515359] [2020-10-05 22:25:25,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 22:25:25,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:25,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 22:25:25,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:25:25,618 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 22:25:26,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:26,906 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-05 22:25:26,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-05 22:25:26,907 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 22:25:26,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:26,908 INFO L225 Difference]: With dead ends: 119 [2020-10-05 22:25:26,908 INFO L226 Difference]: Without dead ends: 113 [2020-10-05 22:25:26,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-05 22:25:26,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-05 22:25:26,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-05 22:25:26,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-05 22:25:26,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-05 22:25:26,911 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-05 22:25:26,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:26,911 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-05 22:25:26,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 22:25:26,911 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-05 22:25:26,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 22:25:26,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:26,911 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:27,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:27,112 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:27,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:27,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-05 22:25:27,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:27,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877966988] [2020-10-05 22:25:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:27,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877966988] [2020-10-05 22:25:27,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959670118] [2020-10-05 22:25:27,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:27,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:25:27,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:27,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 22:25:27,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:27,506 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:25:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:27,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:27,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 22:25:27,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639118630] [2020-10-05 22:25:27,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:25:27,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:27,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:25:27,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:25:27,527 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-05 22:25:29,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:29,139 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-05 22:25:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-05 22:25:29,140 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 22:25:29,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:29,140 INFO L225 Difference]: With dead ends: 100 [2020-10-05 22:25:29,140 INFO L226 Difference]: Without dead ends: 92 [2020-10-05 22:25:29,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-05 22:25:29,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-05 22:25:29,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-05 22:25:29,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-05 22:25:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-05 22:25:29,142 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-05 22:25:29,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:29,143 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-05 22:25:29,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:25:29,143 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-05 22:25:29,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 22:25:29,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:29,144 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:29,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:29,344 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:29,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-05 22:25:29,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:29,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441907937] [2020-10-05 22:25:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:29,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441907937] [2020-10-05 22:25:29,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25489486] [2020-10-05 22:25:29,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:29,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 22:25:29,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:29,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 22:25:29,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:29,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:25:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:29,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:29,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 22:25:29,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814334634] [2020-10-05 22:25:29,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:25:29,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:29,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:25:29,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:25:29,770 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-05 22:25:31,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:31,263 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-05 22:25:31,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-05 22:25:31,264 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 22:25:31,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:31,265 INFO L225 Difference]: With dead ends: 116 [2020-10-05 22:25:31,265 INFO L226 Difference]: Without dead ends: 111 [2020-10-05 22:25:31,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-05 22:25:31,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-05 22:25:31,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-05 22:25:31,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-05 22:25:31,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-05 22:25:31,267 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-05 22:25:31,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:31,267 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-05 22:25:31,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:25:31,268 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-05 22:25:31,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:25:31,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:31,268 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:31,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:31,470 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:31,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:31,470 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-05 22:25:31,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:31,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705516372] [2020-10-05 22:25:31,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:31,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705516372] [2020-10-05 22:25:31,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579674292] [2020-10-05 22:25:31,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:31,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:25:31,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:31,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:25:31,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:31,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:25:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:31,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:31,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 22:25:31,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057576262] [2020-10-05 22:25:31,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 22:25:31,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:31,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 22:25:31,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:25:31,918 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-05 22:25:33,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:33,530 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-05 22:25:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-05 22:25:33,531 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 22:25:33,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:33,531 INFO L225 Difference]: With dead ends: 96 [2020-10-05 22:25:33,531 INFO L226 Difference]: Without dead ends: 91 [2020-10-05 22:25:33,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-05 22:25:33,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-05 22:25:33,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-05 22:25:33,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-05 22:25:33,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-05 22:25:33,533 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-05 22:25:33,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:33,533 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-05 22:25:33,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 22:25:33,534 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-05 22:25:33,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:25:33,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:33,534 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:33,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:33,740 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:33,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:33,740 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-05 22:25:33,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:33,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564247010] [2020-10-05 22:25:33,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:34,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564247010] [2020-10-05 22:25:34,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343802624] [2020-10-05 22:25:34,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:34,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-05 22:25:34,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:34,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:25:34,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:34,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:34,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 22:25:34,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576754581] [2020-10-05 22:25:34,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:25:34,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:34,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:25:34,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:25:34,230 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-05 22:25:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:34,865 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-05 22:25:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:25:34,866 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 22:25:34,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:34,866 INFO L225 Difference]: With dead ends: 102 [2020-10-05 22:25:34,866 INFO L226 Difference]: Without dead ends: 96 [2020-10-05 22:25:34,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 22:25:34,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-05 22:25:34,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-05 22:25:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 22:25:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-05 22:25:34,868 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-05 22:25:34,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:34,868 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-05 22:25:34,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:25:34,868 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-05 22:25:34,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:25:34,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:34,868 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:35,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-05 22:25:35,069 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:35,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:35,070 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-05 22:25:35,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:35,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626116678] [2020-10-05 22:25:35,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:35,478 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:35,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626116678] [2020-10-05 22:25:35,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731495507] [2020-10-05 22:25:35,478 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:35,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-05 22:25:35,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:35,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:25:35,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:35,578 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:25:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:35,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:35,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 22:25:35,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391585667] [2020-10-05 22:25:35,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 22:25:35,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:35,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 22:25:35,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:25:35,590 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-05 22:25:36,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:36,295 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-05 22:25:36,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 22:25:36,296 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 22:25:36,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:36,296 INFO L225 Difference]: With dead ends: 122 [2020-10-05 22:25:36,296 INFO L226 Difference]: Without dead ends: 116 [2020-10-05 22:25:36,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 22:25:36,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-05 22:25:36,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-05 22:25:36,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-05 22:25:36,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-05 22:25:36,299 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-05 22:25:36,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:36,299 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-05 22:25:36,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 22:25:36,299 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-05 22:25:36,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:25:36,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:36,299 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:36,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-05 22:25:36,500 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:36,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:36,501 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-05 22:25:36,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:36,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905893627] [2020-10-05 22:25:36,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:36,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905893627] [2020-10-05 22:25:36,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97691394] [2020-10-05 22:25:36,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:36,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:25:36,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:36,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:36,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 22:25:36,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166207340] [2020-10-05 22:25:36,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:25:36,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:36,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:25:36,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:25:36,981 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-05 22:25:37,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:37,748 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-05 22:25:37,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 22:25:37,749 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 22:25:37,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:37,750 INFO L225 Difference]: With dead ends: 123 [2020-10-05 22:25:37,750 INFO L226 Difference]: Without dead ends: 117 [2020-10-05 22:25:37,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 22:25:37,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-05 22:25:37,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-05 22:25:37,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 22:25:37,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-05 22:25:37,752 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-05 22:25:37,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:37,752 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-05 22:25:37,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:25:37,752 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-05 22:25:37,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:25:37,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:37,752 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:37,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-05 22:25:37,953 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:37,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:37,954 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-05 22:25:37,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:37,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840003165] [2020-10-05 22:25:37,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:38,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840003165] [2020-10-05 22:25:38,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376520043] [2020-10-05 22:25:38,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:38,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:25:38,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:38,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:25:38,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:38,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:25:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:38,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:38,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 22:25:38,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326463800] [2020-10-05 22:25:38,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 22:25:38,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:38,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 22:25:38,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:25:38,463 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-05 22:25:39,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:39,255 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-05 22:25:39,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:25:39,255 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 22:25:39,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:39,256 INFO L225 Difference]: With dead ends: 139 [2020-10-05 22:25:39,256 INFO L226 Difference]: Without dead ends: 133 [2020-10-05 22:25:39,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-05 22:25:39,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-05 22:25:39,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-05 22:25:39,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 22:25:39,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-05 22:25:39,258 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-05 22:25:39,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:39,258 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-05 22:25:39,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 22:25:39,258 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-05 22:25:39,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:25:39,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:39,259 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:39,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-05 22:25:39,466 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:39,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:39,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-05 22:25:39,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:39,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405588974] [2020-10-05 22:25:39,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:39,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405588974] [2020-10-05 22:25:39,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157287849] [2020-10-05 22:25:39,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:39,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-05 22:25:39,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:39,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:25:39,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:39,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:39,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 22:25:39,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067014580] [2020-10-05 22:25:39,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:25:39,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:39,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:25:39,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:25:39,931 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-05 22:25:40,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:40,789 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-05 22:25:40,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 22:25:40,790 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 22:25:40,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:40,791 INFO L225 Difference]: With dead ends: 139 [2020-10-05 22:25:40,791 INFO L226 Difference]: Without dead ends: 133 [2020-10-05 22:25:40,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 22:25:40,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-05 22:25:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-05 22:25:40,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-05 22:25:40,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-05 22:25:40,793 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-05 22:25:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:40,794 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-05 22:25:40,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:25:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-05 22:25:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:25:40,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:40,794 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:40,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:40,995 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:40,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:40,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-05 22:25:40,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:40,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938524025] [2020-10-05 22:25:40,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:41,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938524025] [2020-10-05 22:25:41,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154455159] [2020-10-05 22:25:41,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:41,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:25:41,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:41,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:25:41,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:41,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:25:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:41,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:41,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 22:25:41,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795412299] [2020-10-05 22:25:41,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 22:25:41,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:41,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 22:25:41,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:25:41,502 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-05 22:25:42,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:42,484 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-05 22:25:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 22:25:42,485 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 22:25:42,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:42,485 INFO L225 Difference]: With dead ends: 136 [2020-10-05 22:25:42,485 INFO L226 Difference]: Without dead ends: 130 [2020-10-05 22:25:42,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 22:25:42,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-05 22:25:42,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-05 22:25:42,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-05 22:25:42,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-05 22:25:42,488 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-05 22:25:42,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:42,488 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-05 22:25:42,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 22:25:42,488 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-05 22:25:42,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:25:42,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:42,489 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:42,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-05 22:25:42,689 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:42,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:42,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-05 22:25:42,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:42,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631215713] [2020-10-05 22:25:42,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:43,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631215713] [2020-10-05 22:25:43,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817597630] [2020-10-05 22:25:43,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:43,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-05 22:25:43,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:43,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:25:43,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:43,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:43,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 22:25:43,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003629251] [2020-10-05 22:25:43,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:25:43,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:43,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:25:43,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:25:43,155 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-05 22:25:44,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:44,129 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-05 22:25:44,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 22:25:44,130 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 22:25:44,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:44,130 INFO L225 Difference]: With dead ends: 137 [2020-10-05 22:25:44,130 INFO L226 Difference]: Without dead ends: 131 [2020-10-05 22:25:44,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-05 22:25:44,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-05 22:25:44,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-05 22:25:44,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-05 22:25:44,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-05 22:25:44,133 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-05 22:25:44,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:44,133 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-05 22:25:44,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:25:44,134 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-05 22:25:44,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:25:44,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:44,134 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:44,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:44,335 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:44,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:44,335 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-05 22:25:44,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:44,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911882387] [2020-10-05 22:25:44,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:44,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911882387] [2020-10-05 22:25:44,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835814505] [2020-10-05 22:25:44,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:44,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-05 22:25:44,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:44,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:25:44,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:44,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:25:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:44,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:44,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 22:25:44,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570622864] [2020-10-05 22:25:44,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 22:25:44,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:44,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 22:25:44,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:25:44,832 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-05 22:25:45,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:45,917 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-05 22:25:45,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 22:25:45,918 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 22:25:45,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:45,918 INFO L225 Difference]: With dead ends: 134 [2020-10-05 22:25:45,918 INFO L226 Difference]: Without dead ends: 128 [2020-10-05 22:25:45,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-05 22:25:45,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-05 22:25:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-05 22:25:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-05 22:25:45,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-05 22:25:45,920 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-05 22:25:45,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:45,921 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-05 22:25:45,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 22:25:45,921 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-05 22:25:45,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:25:45,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:45,921 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:46,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-05 22:25:46,122 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:46,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:46,123 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-05 22:25:46,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:46,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792576420] [2020-10-05 22:25:46,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:46,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792576420] [2020-10-05 22:25:46,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542101811] [2020-10-05 22:25:46,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:46,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:25:46,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:46,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:46,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 22:25:46,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532254024] [2020-10-05 22:25:46,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:25:46,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:46,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:25:46,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:25:46,554 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-05 22:25:47,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:47,591 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-05 22:25:47,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-05 22:25:47,592 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 22:25:47,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:47,592 INFO L225 Difference]: With dead ends: 135 [2020-10-05 22:25:47,592 INFO L226 Difference]: Without dead ends: 129 [2020-10-05 22:25:47,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-05 22:25:47,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-05 22:25:47,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-05 22:25:47,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 22:25:47,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-05 22:25:47,594 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-05 22:25:47,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:47,595 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-05 22:25:47,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:25:47,595 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-05 22:25:47,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:25:47,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:47,595 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:47,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:47,796 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:47,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:47,797 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-05 22:25:47,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:47,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768081174] [2020-10-05 22:25:47,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:48,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768081174] [2020-10-05 22:25:48,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481451829] [2020-10-05 22:25:48,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:48,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:25:48,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:48,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:25:48,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:48,245 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:25:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:48,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:48,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 22:25:48,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161751909] [2020-10-05 22:25:48,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 22:25:48,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:48,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 22:25:48,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:25:48,264 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-05 22:25:49,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:49,448 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-05 22:25:49,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 22:25:49,448 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 22:25:49,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:49,449 INFO L225 Difference]: With dead ends: 132 [2020-10-05 22:25:49,449 INFO L226 Difference]: Without dead ends: 126 [2020-10-05 22:25:49,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-05 22:25:49,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-05 22:25:49,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-05 22:25:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 22:25:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-05 22:25:49,451 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-05 22:25:49,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:49,451 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-05 22:25:49,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 22:25:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-05 22:25:49,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:25:49,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:49,452 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:49,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:49,653 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:49,654 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-05 22:25:49,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:49,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023449807] [2020-10-05 22:25:49,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:50,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023449807] [2020-10-05 22:25:50,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985188214] [2020-10-05 22:25:50,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:50,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-05 22:25:50,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:50,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:25:50,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:50,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:50,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 22:25:50,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060488527] [2020-10-05 22:25:50,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:25:50,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:50,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:25:50,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:25:50,087 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-05 22:25:51,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:51,180 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-05 22:25:51,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 22:25:51,181 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 22:25:51,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:51,181 INFO L225 Difference]: With dead ends: 133 [2020-10-05 22:25:51,181 INFO L226 Difference]: Without dead ends: 127 [2020-10-05 22:25:51,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-05 22:25:51,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-05 22:25:51,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-05 22:25:51,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-05 22:25:51,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-05 22:25:51,183 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-05 22:25:51,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:51,183 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-05 22:25:51,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:25:51,184 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-05 22:25:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:25:51,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:51,184 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:51,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:51,385 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:51,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:51,385 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-05 22:25:51,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:51,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947060525] [2020-10-05 22:25:51,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:51,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947060525] [2020-10-05 22:25:51,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411793256] [2020-10-05 22:25:51,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:51,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:25:51,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:51,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:25:51,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:51,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:25:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:51,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:51,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 22:25:51,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238665563] [2020-10-05 22:25:51,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 22:25:51,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:51,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 22:25:51,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:25:51,861 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-05 22:25:53,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:53,201 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-05 22:25:53,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-05 22:25:53,202 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 22:25:53,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:53,203 INFO L225 Difference]: With dead ends: 130 [2020-10-05 22:25:53,203 INFO L226 Difference]: Without dead ends: 124 [2020-10-05 22:25:53,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-05 22:25:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-05 22:25:53,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-05 22:25:53,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-05 22:25:53,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-05 22:25:53,206 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-05 22:25:53,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:53,206 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-05 22:25:53,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 22:25:53,206 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-05 22:25:53,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:25:53,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:53,206 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:53,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:53,407 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:53,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:53,408 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-05 22:25:53,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:53,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407392876] [2020-10-05 22:25:53,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:53,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407392876] [2020-10-05 22:25:53,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481854141] [2020-10-05 22:25:53,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:53,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-05 22:25:53,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:53,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:25:53,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:53,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:53,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 22:25:53,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511414053] [2020-10-05 22:25:53,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:25:53,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:53,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:25:53,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:25:53,856 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-05 22:25:55,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:55,061 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-05 22:25:55,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-05 22:25:55,063 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 22:25:55,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:55,063 INFO L225 Difference]: With dead ends: 131 [2020-10-05 22:25:55,063 INFO L226 Difference]: Without dead ends: 125 [2020-10-05 22:25:55,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-05 22:25:55,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-05 22:25:55,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-05 22:25:55,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-05 22:25:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-05 22:25:55,066 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-05 22:25:55,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:55,067 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-05 22:25:55,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:25:55,067 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-05 22:25:55,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:25:55,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:55,067 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:55,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-05 22:25:55,276 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:55,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:55,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-05 22:25:55,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:55,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440209248] [2020-10-05 22:25:55,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:55,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440209248] [2020-10-05 22:25:55,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854721477] [2020-10-05 22:25:55,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:55,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-05 22:25:55,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:55,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:25:55,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:55,725 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:25:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:55,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:55,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 22:25:55,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75750757] [2020-10-05 22:25:55,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 22:25:55,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:55,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 22:25:55,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:25:55,748 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-05 22:25:57,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:57,172 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-05 22:25:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-05 22:25:57,173 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 22:25:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:57,173 INFO L225 Difference]: With dead ends: 128 [2020-10-05 22:25:57,173 INFO L226 Difference]: Without dead ends: 122 [2020-10-05 22:25:57,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-05 22:25:57,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-05 22:25:57,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-05 22:25:57,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-05 22:25:57,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-05 22:25:57,176 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-05 22:25:57,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:57,176 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-05 22:25:57,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 22:25:57,176 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-05 22:25:57,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:25:57,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:57,176 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:57,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-05 22:25:57,377 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:57,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:57,378 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-05 22:25:57,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:57,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305052514] [2020-10-05 22:25:57,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:57,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305052514] [2020-10-05 22:25:57,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793459459] [2020-10-05 22:25:57,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:57,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:25:57,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:57,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:57,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 22:25:57,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601238371] [2020-10-05 22:25:57,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:25:57,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:57,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:25:57,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:25:57,798 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-05 22:25:59,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:25:59,056 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-05 22:25:59,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-05 22:25:59,057 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 22:25:59,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:25:59,057 INFO L225 Difference]: With dead ends: 129 [2020-10-05 22:25:59,057 INFO L226 Difference]: Without dead ends: 123 [2020-10-05 22:25:59,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-05 22:25:59,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-05 22:25:59,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-05 22:25:59,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 22:25:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 22:25:59,060 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-05 22:25:59,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:25:59,060 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 22:25:59,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:25:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 22:25:59,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:25:59,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:25:59,061 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:25:59,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-05 22:25:59,262 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:25:59,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:25:59,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-05 22:25:59,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:25:59,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235640428] [2020-10-05 22:25:59,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:25:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:25:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:59,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235640428] [2020-10-05 22:25:59,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5930058] [2020-10-05 22:25:59,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:25:59,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:25:59,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:25:59,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:25:59,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:25:59,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:25:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:25:59,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:25:59,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 22:25:59,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277403453] [2020-10-05 22:25:59,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 22:25:59,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:25:59,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 22:25:59,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:25:59,715 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-05 22:26:01,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:26:01,295 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-05 22:26:01,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-05 22:26:01,297 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 22:26:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:26:01,297 INFO L225 Difference]: With dead ends: 126 [2020-10-05 22:26:01,297 INFO L226 Difference]: Without dead ends: 120 [2020-10-05 22:26:01,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-05 22:26:01,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-05 22:26:01,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-05 22:26:01,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 22:26:01,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 22:26:01,299 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-05 22:26:01,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:26:01,300 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 22:26:01,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 22:26:01,300 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 22:26:01,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:26:01,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:26:01,300 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:26:01,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-05 22:26:01,501 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:26:01,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:26:01,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-05 22:26:01,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:26:01,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894678506] [2020-10-05 22:26:01,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:26:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:26:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:26:01,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894678506] [2020-10-05 22:26:01,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764474647] [2020-10-05 22:26:01,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:26:01,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-05 22:26:01,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:26:01,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:26:01,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:26:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:26:01,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:26:01,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 22:26:01,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371596570] [2020-10-05 22:26:01,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:26:01,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:26:01,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:26:01,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:26:01,929 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-05 22:26:03,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:26:03,296 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-05 22:26:03,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-05 22:26:03,297 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 22:26:03,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:26:03,297 INFO L225 Difference]: With dead ends: 127 [2020-10-05 22:26:03,297 INFO L226 Difference]: Without dead ends: 121 [2020-10-05 22:26:03,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-05 22:26:03,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-05 22:26:03,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-05 22:26:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-05 22:26:03,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-05 22:26:03,300 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-05 22:26:03,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:26:03,300 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-05 22:26:03,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:26:03,301 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-05 22:26:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:26:03,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:26:03,301 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:26:03,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:26:03,502 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:26:03,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:26:03,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-05 22:26:03,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:26:03,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287346067] [2020-10-05 22:26:03,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:26:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:26:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:26:03,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287346067] [2020-10-05 22:26:03,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320733755] [2020-10-05 22:26:03,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:26:03,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:26:03,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:26:03,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:26:03,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:26:03,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:26:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:26:03,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:26:03,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 22:26:03,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52156555] [2020-10-05 22:26:03,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 22:26:03,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:26:03,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 22:26:03,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:26:03,952 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-05 22:26:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:26:05,635 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-05 22:26:05,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-05 22:26:05,636 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 22:26:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:26:05,636 INFO L225 Difference]: With dead ends: 124 [2020-10-05 22:26:05,636 INFO L226 Difference]: Without dead ends: 118 [2020-10-05 22:26:05,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-05 22:26:05,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-05 22:26:05,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-05 22:26:05,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-05 22:26:05,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-05 22:26:05,639 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-05 22:26:05,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:26:05,639 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-05 22:26:05,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 22:26:05,639 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-05 22:26:05,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:26:05,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:26:05,639 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:26:05,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-05 22:26:05,840 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:26:05,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:26:05,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-05 22:26:05,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:26:05,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434934498] [2020-10-05 22:26:05,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:26:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:26:06,179 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:26:06,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434934498] [2020-10-05 22:26:06,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519384157] [2020-10-05 22:26:06,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:26:06,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-05 22:26:06,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:26:06,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 22:26:06,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:26:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:26:06,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:26:06,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 22:26:06,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010206123] [2020-10-05 22:26:06,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 22:26:06,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:26:06,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 22:26:06,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:26:06,271 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-05 22:26:07,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:26:07,714 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-05 22:26:07,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-05 22:26:07,715 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 22:26:07,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:26:07,716 INFO L225 Difference]: With dead ends: 144 [2020-10-05 22:26:07,716 INFO L226 Difference]: Without dead ends: 138 [2020-10-05 22:26:07,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-05 22:26:07,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-05 22:26:07,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-05 22:26:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-05 22:26:07,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-05 22:26:07,719 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-05 22:26:07,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:26:07,720 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-05 22:26:07,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 22:26:07,720 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-05 22:26:07,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 22:26:07,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:26:07,720 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:26:07,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:26:07,930 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:26:07,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:26:07,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-05 22:26:07,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:26:07,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060999170] [2020-10-05 22:26:07,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:26:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2020-10-05 22:26:08,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2020-10-05 22:26:08,206 WARN L544 AbstractCegarLoop]: Verification canceled [2020-10-05 22:26:08,209 WARN L228 ceAbstractionStarter]: Timeout [2020-10-05 22:26:08,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 10:26:08 BasicIcfg [2020-10-05 22:26:08,209 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-05 22:26:08,211 INFO L168 Benchmark]: Toolchain (without parser) took 256144.33 ms. Allocated memory was 138.4 MB in the beginning and 179.8 MB in the end (delta: 41.4 MB). Free memory was 99.9 MB in the beginning and 134.3 MB in the end (delta: -34.4 MB). Peak memory consumption was 7.0 MB. Max. memory is 7.1 GB. [2020-10-05 22:26:08,211 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-10-05 22:26:08,212 INFO L168 Benchmark]: CACSL2BoogieTranslator took 663.17 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 99.7 MB in the beginning and 157.9 MB in the end (delta: -58.3 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-10-05 22:26:08,212 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.19 ms. Allocated memory is still 200.8 MB. Free memory was 157.9 MB in the beginning and 155.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-10-05 22:26:08,213 INFO L168 Benchmark]: Boogie Preprocessor took 28.71 ms. Allocated memory is still 200.8 MB. Free memory was 155.9 MB in the beginning and 154.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-10-05 22:26:08,213 INFO L168 Benchmark]: RCFGBuilder took 432.33 ms. Allocated memory is still 200.8 MB. Free memory was 154.5 MB in the beginning and 133.9 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-10-05 22:26:08,214 INFO L168 Benchmark]: TraceAbstraction took 254965.32 ms. Allocated memory was 200.8 MB in the beginning and 179.8 MB in the end (delta: -21.0 MB). Free memory was 133.9 MB in the beginning and 134.3 MB in the end (delta: -414.0 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-05 22:26:08,216 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 663.17 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 99.7 MB in the beginning and 157.9 MB in the end (delta: -58.3 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 49.19 ms. Allocated memory is still 200.8 MB. Free memory was 157.9 MB in the beginning and 155.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.71 ms. Allocated memory is still 200.8 MB. Free memory was 155.9 MB in the beginning and 154.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 432.33 ms. Allocated memory is still 200.8 MB. Free memory was 154.5 MB in the beginning and 133.9 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 254965.32 ms. Allocated memory was 200.8 MB in the beginning and 179.8 MB in the end (delta: -21.0 MB). Free memory was 133.9 MB in the beginning and 134.3 MB in the end (delta: -414.0 kB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was analyzing trace of length 28 with TraceHistMax 10,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 20 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 254.8s, OverallIterations: 218, TraceHistogramMax: 10, AutomataDifference: 144.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 3465 SDtfs, 12023 SDslu, 22383 SDs, 0 SdLazy, 24159 SolverSat, 13670 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11790 GetRequests, 3890 SyntacticMatches, 212 SemanticMatches, 7688 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74742 ImplicationChecksByTransitivity, 148.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 217 MinimizatonAttempts, 5479 StatesRemovedByMinimization, 216 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.9s SsaConstructionTime, 5.3s SatisfiabilityAnalysisTime, 48.6s InterpolantComputationTime, 8900 NumberOfCodeBlocks, 8900 NumberOfCodeBlocksAsserted, 1106 NumberOfCheckSat, 8471 ConstructedInterpolants, 0 QuantifiedInterpolants, 800983 SizeOfPredicates, 2732 NumberOfNonLiveVariables, 27228 ConjunctsInSsa, 3586 ConjunctsInUnsatCore, 429 InterpolantComputations, 5 PerfectInterpolantSequences, 0/17088 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown