/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-MCR.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 23:25:27,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 23:25:27,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 23:25:27,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 23:25:27,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 23:25:27,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 23:25:27,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 23:25:27,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 23:25:27,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 23:25:27,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 23:25:27,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 23:25:27,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 23:25:27,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 23:25:27,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 23:25:27,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 23:25:27,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 23:25:27,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 23:25:27,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 23:25:27,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 23:25:27,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 23:25:27,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 23:25:27,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 23:25:27,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 23:25:27,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 23:25:27,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-27 23:25:27,850 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-27 23:25:27,850 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-27 23:25:27,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-27 23:25:27,851 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-27 23:25:27,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-27 23:25:27,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 23:25:27,855 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 23:25:27,856 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 23:25:27,857 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 23:25:27,858 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 23:25:27,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 23:25:27,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 23:25:27,860 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 23:25:27,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 23:25:27,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 23:25:27,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 23:25:27,866 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-MCR.epf [2019-12-27 23:25:27,891 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 23:25:27,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 23:25:27,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 23:25:27,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 23:25:27,893 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 23:25:27,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 23:25:27,894 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 23:25:27,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 23:25:27,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 23:25:27,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 23:25:27,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 23:25:27,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 23:25:27,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 23:25:27,895 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 23:25:27,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 23:25:27,895 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 23:25:27,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 23:25:27,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 23:25:27,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 23:25:27,896 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 23:25:27,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 23:25:27,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 23:25:27,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 23:25:27,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 23:25:27,897 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 23:25:27,897 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 23:25:27,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 23:25:27,897 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2019-12-27 23:25:27,898 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2019-12-27 23:25:27,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 23:25:27,898 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2019-12-27 23:25:27,898 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 23:25:28,189 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 23:25:28,202 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 23:25:28,206 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 23:25:28,207 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 23:25:28,207 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 23:25:28,208 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2019-12-27 23:25:28,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e55d8f05/25f3aa185555432c83cfeb1c1257570d/FLAG481bb98cc [2019-12-27 23:25:28,812 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 23:25:28,813 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2019-12-27 23:25:28,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e55d8f05/25f3aa185555432c83cfeb1c1257570d/FLAG481bb98cc [2019-12-27 23:25:29,149 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e55d8f05/25f3aa185555432c83cfeb1c1257570d [2019-12-27 23:25:29,157 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 23:25:29,159 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 23:25:29,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 23:25:29,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 23:25:29,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 23:25:29,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:25:29" (1/1) ... [2019-12-27 23:25:29,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77d0f8ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:25:29, skipping insertion in model container [2019-12-27 23:25:29,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:25:29" (1/1) ... [2019-12-27 23:25:29,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 23:25:29,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 23:25:29,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 23:25:29,661 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 23:25:29,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 23:25:29,807 INFO L208 MainTranslator]: Completed translation [2019-12-27 23:25:29,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:25:29 WrapperNode [2019-12-27 23:25:29,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 23:25:29,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 23:25:29,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 23:25:29,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 23:25:29,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:25:29" (1/1) ... [2019-12-27 23:25:29,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:25:29" (1/1) ... [2019-12-27 23:25:29,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 23:25:29,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 23:25:29,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 23:25:29,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 23:25:29,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:25:29" (1/1) ... [2019-12-27 23:25:29,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:25:29" (1/1) ... [2019-12-27 23:25:29,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:25:29" (1/1) ... [2019-12-27 23:25:29,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:25:29" (1/1) ... [2019-12-27 23:25:29,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:25:29" (1/1) ... [2019-12-27 23:25:29,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:25:29" (1/1) ... [2019-12-27 23:25:29,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:25:29" (1/1) ... [2019-12-27 23:25:29,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 23:25:29,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 23:25:29,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 23:25:29,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 23:25:29,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:25:29" (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 [2019-12-27 23:25:29,959 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 23:25:29,959 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 23:25:29,959 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 23:25:29,960 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 23:25:29,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 23:25:29,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 23:25:29,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 23:25:29,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 23:25:29,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 23:25:29,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 23:25:29,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 23:25:29,963 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-27 23:25:30,344 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 23:25:30,344 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 23:25:30,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:25:30 BoogieIcfgContainer [2019-12-27 23:25:30,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 23:25:30,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 23:25:30,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 23:25:30,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 23:25:30,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 11:25:29" (1/3) ... [2019-12-27 23:25:30,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a6dd5d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:25:30, skipping insertion in model container [2019-12-27 23:25:30,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:25:29" (2/3) ... [2019-12-27 23:25:30,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a6dd5d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:25:30, skipping insertion in model container [2019-12-27 23:25:30,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:25:30" (3/3) ... [2019-12-27 23:25:30,354 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2019-12-27 23:25:30,364 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 23:25:30,365 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 23:25:30,370 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 23:25:30,371 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 23:25:30,396 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,396 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,396 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,397 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,397 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,397 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,398 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,398 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,398 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,399 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,399 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,399 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,400 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,400 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,400 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,401 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,401 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,401 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,401 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,402 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,402 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,402 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,403 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,403 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,403 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,404 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,404 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,404 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,404 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,405 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,409 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,409 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,409 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,410 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,410 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,410 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,419 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,419 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,420 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,421 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,421 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,421 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:25:30,436 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 23:25:30,453 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 23:25:30,453 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 23:25:30,453 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 23:25:30,453 INFO L376 AbstractCegarLoop]: Backedges is MCR [2019-12-27 23:25:30,453 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 23:25:30,454 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 23:25:30,454 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 23:25:30,454 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 23:25:30,463 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 53 transitions [2019-12-27 23:25:30,550 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1244 states. [2019-12-27 23:25:30,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states. [2019-12-27 23:25:30,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:25:30,561 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:30,562 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:30,563 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:30,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:30,569 INFO L82 PathProgramCache]: Analyzing trace with hash 978645364, now seen corresponding path program 1 times [2019-12-27 23:25:30,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:30,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161721639] [2019-12-27 23:25:30,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:30,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161721639] [2019-12-27 23:25:30,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 23:25:30,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-27 23:25:30,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1763168732] [2019-12-27 23:25:30,947 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:30,954 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:30,975 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 20 transitions. [2019-12-27 23:25:30,976 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:30,980 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:25:30,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 23:25:30,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:30,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 23:25:30,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-27 23:25:31,001 INFO L87 Difference]: Start difference. First operand 1244 states. Second operand 5 states. [2019-12-27 23:25:31,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:31,182 INFO L93 Difference]: Finished difference Result 2093 states and 6041 transitions. [2019-12-27 23:25:31,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 23:25:31,184 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-12-27 23:25:31,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:31,206 INFO L225 Difference]: With dead ends: 2093 [2019-12-27 23:25:31,206 INFO L226 Difference]: Without dead ends: 572 [2019-12-27 23:25:31,208 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-12-27 23:25:31,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-12-27 23:25:31,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 460. [2019-12-27 23:25:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2019-12-27 23:25:31,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1179 transitions. [2019-12-27 23:25:31,300 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1179 transitions. Word has length 20 [2019-12-27 23:25:31,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:31,300 INFO L462 AbstractCegarLoop]: Abstraction has 460 states and 1179 transitions. [2019-12-27 23:25:31,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 23:25:31,301 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1179 transitions. [2019-12-27 23:25:31,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-27 23:25:31,303 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:31,303 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:31,303 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:31,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:31,304 INFO L82 PathProgramCache]: Analyzing trace with hash 2103912560, now seen corresponding path program 1 times [2019-12-27 23:25:31,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:31,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936072038] [2019-12-27 23:25:31,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:31,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936072038] [2019-12-27 23:25:31,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 23:25:31,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-27 23:25:31,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2007132481] [2019-12-27 23:25:31,500 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:31,503 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:31,506 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 24 transitions. [2019-12-27 23:25:31,507 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:31,507 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:25:31,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 23:25:31,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:31,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 23:25:31,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-27 23:25:31,510 INFO L87 Difference]: Start difference. First operand 460 states and 1179 transitions. Second operand 6 states. [2019-12-27 23:25:31,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:31,689 INFO L93 Difference]: Finished difference Result 908 states and 2257 transitions. [2019-12-27 23:25:31,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 23:25:31,691 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-12-27 23:25:31,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:31,699 INFO L225 Difference]: With dead ends: 908 [2019-12-27 23:25:31,699 INFO L226 Difference]: Without dead ends: 673 [2019-12-27 23:25:31,702 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-12-27 23:25:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-12-27 23:25:31,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 554. [2019-12-27 23:25:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-12-27 23:25:31,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1367 transitions. [2019-12-27 23:25:31,756 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1367 transitions. Word has length 24 [2019-12-27 23:25:31,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:31,758 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 1367 transitions. [2019-12-27 23:25:31,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 23:25:31,758 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1367 transitions. [2019-12-27 23:25:31,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-27 23:25:31,766 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:31,766 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:31,767 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:31,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:31,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1857069363, now seen corresponding path program 1 times [2019-12-27 23:25:31,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:31,768 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575090695] [2019-12-27 23:25:31,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:31,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575090695] [2019-12-27 23:25:31,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176447465] [2019-12-27 23:25:31,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:32,060 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 23:25:32,068 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:32,181 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:32,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:32,188 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:32,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:32,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-12-27 23:25:32,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1633385352] [2019-12-27 23:25:32,195 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:32,199 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:32,204 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 28 transitions. [2019-12-27 23:25:32,205 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:32,205 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:25:32,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 23:25:32,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:32,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 23:25:32,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-27 23:25:32,207 INFO L87 Difference]: Start difference. First operand 554 states and 1367 transitions. Second operand 7 states. [2019-12-27 23:25:32,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:32,451 INFO L93 Difference]: Finished difference Result 967 states and 2375 transitions. [2019-12-27 23:25:32,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 23:25:32,451 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2019-12-27 23:25:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:32,457 INFO L225 Difference]: With dead ends: 967 [2019-12-27 23:25:32,457 INFO L226 Difference]: Without dead ends: 753 [2019-12-27 23:25:32,458 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:25:32,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2019-12-27 23:25:32,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 591. [2019-12-27 23:25:32,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2019-12-27 23:25:32,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1445 transitions. [2019-12-27 23:25:32,490 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1445 transitions. Word has length 28 [2019-12-27 23:25:32,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:32,491 INFO L462 AbstractCegarLoop]: Abstraction has 591 states and 1445 transitions. [2019-12-27 23:25:32,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 23:25:32,491 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1445 transitions. [2019-12-27 23:25:32,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-27 23:25:32,493 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:32,493 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:32,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:32,706 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:32,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:32,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1304113332, now seen corresponding path program 1 times [2019-12-27 23:25:32,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:32,709 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123426151] [2019-12-27 23:25:32,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:32,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123426151] [2019-12-27 23:25:32,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 23:25:32,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-27 23:25:32,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [275687366] [2019-12-27 23:25:32,842 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:32,845 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:32,852 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 53 states and 76 transitions. [2019-12-27 23:25:32,852 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:32,857 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:25:32,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 23:25:32,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:32,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 23:25:32,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-12-27 23:25:32,858 INFO L87 Difference]: Start difference. First operand 591 states and 1445 transitions. Second operand 7 states. [2019-12-27 23:25:32,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:32,998 INFO L93 Difference]: Finished difference Result 984 states and 2381 transitions. [2019-12-27 23:25:32,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 23:25:32,999 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2019-12-27 23:25:32,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:33,005 INFO L225 Difference]: With dead ends: 984 [2019-12-27 23:25:33,005 INFO L226 Difference]: Without dead ends: 835 [2019-12-27 23:25:33,005 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-12-27 23:25:33,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2019-12-27 23:25:33,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 657. [2019-12-27 23:25:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2019-12-27 23:25:33,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1573 transitions. [2019-12-27 23:25:33,029 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1573 transitions. Word has length 28 [2019-12-27 23:25:33,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:33,030 INFO L462 AbstractCegarLoop]: Abstraction has 657 states and 1573 transitions. [2019-12-27 23:25:33,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 23:25:33,030 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1573 transitions. [2019-12-27 23:25:33,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-27 23:25:33,032 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:33,032 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:33,032 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:33,033 INFO L82 PathProgramCache]: Analyzing trace with hash 960102518, now seen corresponding path program 2 times [2019-12-27 23:25:33,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:33,033 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655143206] [2019-12-27 23:25:33,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:33,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655143206] [2019-12-27 23:25:33,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179918890] [2019-12-27 23:25:33,263 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:33,341 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:25:33,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:33,343 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 23:25:33,351 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:33,431 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:33,432 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:33,434 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:33,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:33,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-12-27 23:25:33,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1473636926] [2019-12-27 23:25:33,442 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:33,447 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:33,452 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 32 transitions. [2019-12-27 23:25:33,452 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:33,452 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:25:33,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 23:25:33,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:33,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 23:25:33,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-12-27 23:25:33,454 INFO L87 Difference]: Start difference. First operand 657 states and 1573 transitions. Second operand 8 states. [2019-12-27 23:25:33,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:33,699 INFO L93 Difference]: Finished difference Result 1129 states and 2699 transitions. [2019-12-27 23:25:33,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 23:25:33,700 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-12-27 23:25:33,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:33,706 INFO L225 Difference]: With dead ends: 1129 [2019-12-27 23:25:33,706 INFO L226 Difference]: Without dead ends: 915 [2019-12-27 23:25:33,706 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:25:33,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2019-12-27 23:25:33,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 685. [2019-12-27 23:25:33,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 685 states. [2019-12-27 23:25:33,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1633 transitions. [2019-12-27 23:25:33,732 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1633 transitions. Word has length 32 [2019-12-27 23:25:33,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:33,733 INFO L462 AbstractCegarLoop]: Abstraction has 685 states and 1633 transitions. [2019-12-27 23:25:33,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 23:25:33,733 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1633 transitions. [2019-12-27 23:25:33,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-27 23:25:33,735 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:33,735 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:33,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:33,942 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:33,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:33,943 INFO L82 PathProgramCache]: Analyzing trace with hash 407146487, now seen corresponding path program 1 times [2019-12-27 23:25:33,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:33,944 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660023643] [2019-12-27 23:25:33,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:34,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660023643] [2019-12-27 23:25:34,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388851545] [2019-12-27 23:25:34,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-12-27 23:25:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:34,148 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 23:25:34,151 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:34,220 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:34,221 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:34,223 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:34,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:34,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-12-27 23:25:34,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1723868701] [2019-12-27 23:25:34,228 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:34,232 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:34,242 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 66 states and 98 transitions. [2019-12-27 23:25:34,242 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:34,243 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:25:34,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 23:25:34,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:34,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 23:25:34,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-27 23:25:34,245 INFO L87 Difference]: Start difference. First operand 685 states and 1633 transitions. Second operand 8 states. [2019-12-27 23:25:34,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:34,425 INFO L93 Difference]: Finished difference Result 1022 states and 2436 transitions. [2019-12-27 23:25:34,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 23:25:34,426 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-12-27 23:25:34,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:34,432 INFO L225 Difference]: With dead ends: 1022 [2019-12-27 23:25:34,432 INFO L226 Difference]: Without dead ends: 915 [2019-12-27 23:25:34,432 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:25:34,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2019-12-27 23:25:34,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 693. [2019-12-27 23:25:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2019-12-27 23:25:34,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1662 transitions. [2019-12-27 23:25:34,472 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1662 transitions. Word has length 32 [2019-12-27 23:25:34,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:34,473 INFO L462 AbstractCegarLoop]: Abstraction has 693 states and 1662 transitions. [2019-12-27 23:25:34,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 23:25:34,473 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1662 transitions. [2019-12-27 23:25:34,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-27 23:25:34,474 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:34,474 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:34,682 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:34,682 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:34,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:34,683 INFO L82 PathProgramCache]: Analyzing trace with hash -729133039, now seen corresponding path program 1 times [2019-12-27 23:25:34,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:34,683 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673756671] [2019-12-27 23:25:34,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:34,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673756671] [2019-12-27 23:25:34,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116027705] [2019-12-27 23:25:34,836 INFO L94 rtionOrderModulation]: Keeping assertion order 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 [2019-12-27 23:25:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:34,896 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 23:25:34,906 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:34,978 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:34,979 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:34,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:34,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:34,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-12-27 23:25:34,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1925781273] [2019-12-27 23:25:34,989 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:34,992 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:35,003 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 81 states and 128 transitions. [2019-12-27 23:25:35,004 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:35,008 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 23:25:35,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 23:25:35,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:35,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 23:25:35,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-27 23:25:35,010 INFO L87 Difference]: Start difference. First operand 693 states and 1662 transitions. Second operand 8 states. [2019-12-27 23:25:35,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:35,181 INFO L93 Difference]: Finished difference Result 1165 states and 2743 transitions. [2019-12-27 23:25:35,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 23:25:35,182 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-12-27 23:25:35,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:35,188 INFO L225 Difference]: With dead ends: 1165 [2019-12-27 23:25:35,188 INFO L226 Difference]: Without dead ends: 1016 [2019-12-27 23:25:35,188 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:25:35,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2019-12-27 23:25:35,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 742. [2019-12-27 23:25:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 742 states. [2019-12-27 23:25:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1764 transitions. [2019-12-27 23:25:35,212 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1764 transitions. Word has length 32 [2019-12-27 23:25:35,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:35,212 INFO L462 AbstractCegarLoop]: Abstraction has 742 states and 1764 transitions. [2019-12-27 23:25:35,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 23:25:35,213 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1764 transitions. [2019-12-27 23:25:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-27 23:25:35,214 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:35,214 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:35,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:35,418 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:35,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:35,418 INFO L82 PathProgramCache]: Analyzing trace with hash -719302009, now seen corresponding path program 2 times [2019-12-27 23:25:35,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:35,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931807995] [2019-12-27 23:25:35,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:35,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931807995] [2019-12-27 23:25:35,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108379782] [2019-12-27 23:25:35,553 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:35,623 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:25:35,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:35,624 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 23:25:35,628 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:35,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:35,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:35,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:35,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-12-27 23:25:35,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [363968922] [2019-12-27 23:25:35,726 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:35,729 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:35,743 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 78 states and 122 transitions. [2019-12-27 23:25:35,744 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:35,748 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 23:25:35,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 23:25:35,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:35,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 23:25:35,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-12-27 23:25:35,750 INFO L87 Difference]: Start difference. First operand 742 states and 1764 transitions. Second operand 8 states. [2019-12-27 23:25:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:35,967 INFO L93 Difference]: Finished difference Result 1144 states and 2680 transitions. [2019-12-27 23:25:35,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 23:25:35,968 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-12-27 23:25:35,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:35,975 INFO L225 Difference]: With dead ends: 1144 [2019-12-27 23:25:35,976 INFO L226 Difference]: Without dead ends: 1037 [2019-12-27 23:25:35,976 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:25:35,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2019-12-27 23:25:35,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 754. [2019-12-27 23:25:35,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2019-12-27 23:25:36,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1791 transitions. [2019-12-27 23:25:36,002 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1791 transitions. Word has length 32 [2019-12-27 23:25:36,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:36,003 INFO L462 AbstractCegarLoop]: Abstraction has 754 states and 1791 transitions. [2019-12-27 23:25:36,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 23:25:36,003 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1791 transitions. [2019-12-27 23:25:36,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-27 23:25:36,005 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:36,005 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:36,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:36,209 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:36,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:36,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1769924471, now seen corresponding path program 2 times [2019-12-27 23:25:36,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:36,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514456736] [2019-12-27 23:25:36,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:36,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514456736] [2019-12-27 23:25:36,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938459854] [2019-12-27 23:25:36,333 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:36,395 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:25:36,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:36,396 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 23:25:36,397 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:36,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:36,463 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:36,465 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:36,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:36,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-12-27 23:25:36,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [690577283] [2019-12-27 23:25:36,469 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:36,472 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:36,481 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 57 states and 80 transitions. [2019-12-27 23:25:36,482 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:36,484 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:25:36,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 23:25:36,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:36,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 23:25:36,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-27 23:25:36,485 INFO L87 Difference]: Start difference. First operand 754 states and 1791 transitions. Second operand 8 states. [2019-12-27 23:25:36,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:36,682 INFO L93 Difference]: Finished difference Result 1144 states and 2680 transitions. [2019-12-27 23:25:36,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 23:25:36,683 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-12-27 23:25:36,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:36,689 INFO L225 Difference]: With dead ends: 1144 [2019-12-27 23:25:36,689 INFO L226 Difference]: Without dead ends: 1037 [2019-12-27 23:25:36,689 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:25:36,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2019-12-27 23:25:36,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 760. [2019-12-27 23:25:36,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2019-12-27 23:25:36,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1794 transitions. [2019-12-27 23:25:36,712 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1794 transitions. Word has length 32 [2019-12-27 23:25:36,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:36,712 INFO L462 AbstractCegarLoop]: Abstraction has 760 states and 1794 transitions. [2019-12-27 23:25:36,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 23:25:36,712 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1794 transitions. [2019-12-27 23:25:36,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 23:25:36,714 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:36,714 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:36,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:36,927 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:36,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:36,927 INFO L82 PathProgramCache]: Analyzing trace with hash -710146503, now seen corresponding path program 3 times [2019-12-27 23:25:36,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:36,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956999207] [2019-12-27 23:25:36,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:37,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956999207] [2019-12-27 23:25:37,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376302380] [2019-12-27 23:25:37,099 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:37,143 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:25:37,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:37,144 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 23:25:37,146 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:37,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:37,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:37,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:37,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:37,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-27 23:25:37,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1510102153] [2019-12-27 23:25:37,250 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:37,254 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:37,259 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 37 states and 36 transitions. [2019-12-27 23:25:37,259 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:37,260 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:25:37,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 23:25:37,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:37,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 23:25:37,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:25:37,261 INFO L87 Difference]: Start difference. First operand 760 states and 1794 transitions. Second operand 9 states. [2019-12-27 23:25:37,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:37,495 INFO L93 Difference]: Finished difference Result 1291 states and 3023 transitions. [2019-12-27 23:25:37,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 23:25:37,497 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2019-12-27 23:25:37,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:37,503 INFO L225 Difference]: With dead ends: 1291 [2019-12-27 23:25:37,503 INFO L226 Difference]: Without dead ends: 1077 [2019-12-27 23:25:37,504 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:25:37,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2019-12-27 23:25:37,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 788. [2019-12-27 23:25:37,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2019-12-27 23:25:37,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1854 transitions. [2019-12-27 23:25:37,527 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1854 transitions. Word has length 36 [2019-12-27 23:25:37,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:37,527 INFO L462 AbstractCegarLoop]: Abstraction has 788 states and 1854 transitions. [2019-12-27 23:25:37,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 23:25:37,527 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1854 transitions. [2019-12-27 23:25:37,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 23:25:37,528 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:37,529 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:37,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:37,742 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:37,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:37,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1263102534, now seen corresponding path program 3 times [2019-12-27 23:25:37,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:37,743 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329323059] [2019-12-27 23:25:37,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:37,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329323059] [2019-12-27 23:25:37,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117646841] [2019-12-27 23:25:37,893 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:37,954 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:25:37,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:37,955 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 23:25:37,959 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:38,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:38,114 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:38,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:38,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:38,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-27 23:25:38,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1523687267] [2019-12-27 23:25:38,141 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:38,145 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:38,159 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 82 states and 126 transitions. [2019-12-27 23:25:38,159 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:38,160 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:25:38,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 23:25:38,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:38,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 23:25:38,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:25:38,162 INFO L87 Difference]: Start difference. First operand 788 states and 1854 transitions. Second operand 9 states. [2019-12-27 23:25:38,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:38,408 INFO L93 Difference]: Finished difference Result 1224 states and 2840 transitions. [2019-12-27 23:25:38,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 23:25:38,408 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2019-12-27 23:25:38,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:38,415 INFO L225 Difference]: With dead ends: 1224 [2019-12-27 23:25:38,415 INFO L226 Difference]: Without dead ends: 1117 [2019-12-27 23:25:38,415 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2019-12-27 23:25:38,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2019-12-27 23:25:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 788. [2019-12-27 23:25:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2019-12-27 23:25:38,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1854 transitions. [2019-12-27 23:25:38,439 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1854 transitions. Word has length 36 [2019-12-27 23:25:38,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:38,439 INFO L462 AbstractCegarLoop]: Abstraction has 788 states and 1854 transitions. [2019-12-27 23:25:38,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 23:25:38,439 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1854 transitions. [2019-12-27 23:25:38,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 23:25:38,440 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:38,440 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:38,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:38,645 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:38,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:38,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1895585236, now seen corresponding path program 1 times [2019-12-27 23:25:38,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:38,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843339267] [2019-12-27 23:25:38,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:38,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843339267] [2019-12-27 23:25:38,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203210074] [2019-12-27 23:25:38,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-12-27 23:25:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:38,837 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 23:25:38,839 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:38,935 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:38,936 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:38,939 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:38,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:38,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:38,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-27 23:25:38,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [242673647] [2019-12-27 23:25:38,945 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:38,949 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:38,961 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 82 states and 126 transitions. [2019-12-27 23:25:38,962 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:38,963 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:25:38,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 23:25:38,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:38,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 23:25:38,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:25:38,965 INFO L87 Difference]: Start difference. First operand 788 states and 1854 transitions. Second operand 9 states. [2019-12-27 23:25:39,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:39,225 INFO L93 Difference]: Finished difference Result 1264 states and 2920 transitions. [2019-12-27 23:25:39,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 23:25:39,226 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2019-12-27 23:25:39,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:39,231 INFO L225 Difference]: With dead ends: 1264 [2019-12-27 23:25:39,231 INFO L226 Difference]: Without dead ends: 1157 [2019-12-27 23:25:39,232 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:25:39,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2019-12-27 23:25:39,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 804. [2019-12-27 23:25:39,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 804 states. [2019-12-27 23:25:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1894 transitions. [2019-12-27 23:25:39,254 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1894 transitions. Word has length 36 [2019-12-27 23:25:39,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:39,254 INFO L462 AbstractCegarLoop]: Abstraction has 804 states and 1894 transitions. [2019-12-27 23:25:39,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 23:25:39,255 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1894 transitions. [2019-12-27 23:25:39,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 23:25:39,256 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:39,256 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:39,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:39,459 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:39,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:39,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1905416266, now seen corresponding path program 2 times [2019-12-27 23:25:39,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:39,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610059004] [2019-12-27 23:25:39,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:39,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610059004] [2019-12-27 23:25:39,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489591848] [2019-12-27 23:25:39,586 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:39,636 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:25:39,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:39,637 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 23:25:39,638 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:39,737 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:39,738 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:39,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:39,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-27 23:25:39,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1252970378] [2019-12-27 23:25:39,747 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:39,751 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:39,763 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 82 states and 126 transitions. [2019-12-27 23:25:39,764 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:39,766 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:25:39,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 23:25:39,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:39,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 23:25:39,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:25:39,767 INFO L87 Difference]: Start difference. First operand 804 states and 1894 transitions. Second operand 9 states. [2019-12-27 23:25:40,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:40,032 INFO L93 Difference]: Finished difference Result 1252 states and 2900 transitions. [2019-12-27 23:25:40,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 23:25:40,033 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2019-12-27 23:25:40,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:40,037 INFO L225 Difference]: With dead ends: 1252 [2019-12-27 23:25:40,037 INFO L226 Difference]: Without dead ends: 1145 [2019-12-27 23:25:40,038 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:25:40,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2019-12-27 23:25:40,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 800. [2019-12-27 23:25:40,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 800 states. [2019-12-27 23:25:40,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1881 transitions. [2019-12-27 23:25:40,058 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1881 transitions. Word has length 36 [2019-12-27 23:25:40,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:40,058 INFO L462 AbstractCegarLoop]: Abstraction has 800 states and 1881 transitions. [2019-12-27 23:25:40,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 23:25:40,058 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1881 transitions. [2019-12-27 23:25:40,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 23:25:40,060 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:40,060 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:40,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:40,264 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:40,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:40,264 INFO L82 PathProgramCache]: Analyzing trace with hash 365983982, now seen corresponding path program 3 times [2019-12-27 23:25:40,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:40,265 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893883575] [2019-12-27 23:25:40,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:40,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893883575] [2019-12-27 23:25:40,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967189041] [2019-12-27 23:25:40,390 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:40,438 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:25:40,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:40,439 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 23:25:40,440 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:40,536 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:40,537 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:40,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:40,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:40,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-27 23:25:40,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1336248520] [2019-12-27 23:25:40,550 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:40,556 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:40,576 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 109 states and 180 transitions. [2019-12-27 23:25:40,577 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:40,588 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 18 times. [2019-12-27 23:25:40,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 23:25:40,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:40,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 23:25:40,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:25:40,596 INFO L87 Difference]: Start difference. First operand 800 states and 1881 transitions. Second operand 9 states. [2019-12-27 23:25:40,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:40,872 INFO L93 Difference]: Finished difference Result 1306 states and 3025 transitions. [2019-12-27 23:25:40,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 23:25:40,872 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2019-12-27 23:25:40,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:40,879 INFO L225 Difference]: With dead ends: 1306 [2019-12-27 23:25:40,879 INFO L226 Difference]: Without dead ends: 1157 [2019-12-27 23:25:40,880 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:25:40,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2019-12-27 23:25:40,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 853. [2019-12-27 23:25:40,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 853 states. [2019-12-27 23:25:40,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1996 transitions. [2019-12-27 23:25:40,901 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1996 transitions. Word has length 36 [2019-12-27 23:25:40,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:40,901 INFO L462 AbstractCegarLoop]: Abstraction has 853 states and 1996 transitions. [2019-12-27 23:25:40,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 23:25:40,901 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1996 transitions. [2019-12-27 23:25:40,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 23:25:40,903 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:40,903 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:41,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:41,106 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:41,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:41,106 INFO L82 PathProgramCache]: Analyzing trace with hash 375815012, now seen corresponding path program 4 times [2019-12-27 23:25:41,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:41,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225462995] [2019-12-27 23:25:41,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:41,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225462995] [2019-12-27 23:25:41,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83160489] [2019-12-27 23:25:41,240 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:41,303 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:25:41,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:41,304 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 23:25:41,313 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:41,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:41,516 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:41,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:41,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:41,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-27 23:25:41,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1316366821] [2019-12-27 23:25:41,529 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:41,535 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:41,552 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 106 states and 174 transitions. [2019-12-27 23:25:41,552 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:41,556 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 15 times. [2019-12-27 23:25:41,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 23:25:41,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:41,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 23:25:41,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:25:41,557 INFO L87 Difference]: Start difference. First operand 853 states and 1996 transitions. Second operand 9 states. [2019-12-27 23:25:41,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:41,827 INFO L93 Difference]: Finished difference Result 1365 states and 3122 transitions. [2019-12-27 23:25:41,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 23:25:41,828 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2019-12-27 23:25:41,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:41,834 INFO L225 Difference]: With dead ends: 1365 [2019-12-27 23:25:41,835 INFO L226 Difference]: Without dead ends: 1258 [2019-12-27 23:25:41,837 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:25:41,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2019-12-27 23:25:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 849. [2019-12-27 23:25:41,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 849 states. [2019-12-27 23:25:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1983 transitions. [2019-12-27 23:25:41,872 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1983 transitions. Word has length 36 [2019-12-27 23:25:41,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:41,872 INFO L462 AbstractCegarLoop]: Abstraction has 849 states and 1983 transitions. [2019-12-27 23:25:41,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 23:25:41,872 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1983 transitions. [2019-12-27 23:25:41,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 23:25:41,874 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:41,874 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:42,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:42,077 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:42,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:42,078 INFO L82 PathProgramCache]: Analyzing trace with hash 699135054, now seen corresponding path program 3 times [2019-12-27 23:25:42,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:42,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200267668] [2019-12-27 23:25:42,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:42,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:42,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200267668] [2019-12-27 23:25:42,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941573201] [2019-12-27 23:25:42,206 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:42,253 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 23:25:42,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:42,254 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 23:25:42,255 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:42,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:42,342 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:42,343 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:42,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:42,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-27 23:25:42,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1560316549] [2019-12-27 23:25:42,348 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:42,351 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:42,363 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 94 states and 150 transitions. [2019-12-27 23:25:42,363 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:42,365 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 11 times. [2019-12-27 23:25:42,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 23:25:42,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:42,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 23:25:42,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:25:42,366 INFO L87 Difference]: Start difference. First operand 849 states and 1983 transitions. Second operand 9 states. [2019-12-27 23:25:42,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:42,620 INFO L93 Difference]: Finished difference Result 1405 states and 3202 transitions. [2019-12-27 23:25:42,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 23:25:42,620 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2019-12-27 23:25:42,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:42,626 INFO L225 Difference]: With dead ends: 1405 [2019-12-27 23:25:42,626 INFO L226 Difference]: Without dead ends: 1298 [2019-12-27 23:25:42,627 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2019-12-27 23:25:42,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2019-12-27 23:25:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 865. [2019-12-27 23:25:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 865 states. [2019-12-27 23:25:42,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2023 transitions. [2019-12-27 23:25:42,647 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2023 transitions. Word has length 36 [2019-12-27 23:25:42,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:42,648 INFO L462 AbstractCegarLoop]: Abstraction has 865 states and 2023 transitions. [2019-12-27 23:25:42,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 23:25:42,648 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2023 transitions. [2019-12-27 23:25:42,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 23:25:42,651 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:42,651 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:42,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:42,859 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:42,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:42,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1152256164, now seen corresponding path program 4 times [2019-12-27 23:25:42,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:42,861 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859979495] [2019-12-27 23:25:42,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:43,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859979495] [2019-12-27 23:25:43,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373338609] [2019-12-27 23:25:43,019 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:43,089 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:25:43,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:43,090 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 23:25:43,091 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:43,175 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:43,175 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:43,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:43,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:43,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-27 23:25:43,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [487071272] [2019-12-27 23:25:43,186 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:43,190 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:43,204 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 94 states and 150 transitions. [2019-12-27 23:25:43,204 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:43,207 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 23:25:43,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 23:25:43,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:43,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 23:25:43,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:25:43,208 INFO L87 Difference]: Start difference. First operand 865 states and 2023 transitions. Second operand 9 states. [2019-12-27 23:25:43,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:43,463 INFO L93 Difference]: Finished difference Result 1346 states and 3084 transitions. [2019-12-27 23:25:43,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 23:25:43,464 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2019-12-27 23:25:43,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:43,469 INFO L225 Difference]: With dead ends: 1346 [2019-12-27 23:25:43,470 INFO L226 Difference]: Without dead ends: 1239 [2019-12-27 23:25:43,470 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2019-12-27 23:25:43,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2019-12-27 23:25:43,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 867. [2019-12-27 23:25:43,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 867 states. [2019-12-27 23:25:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2013 transitions. [2019-12-27 23:25:43,489 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2013 transitions. Word has length 36 [2019-12-27 23:25:43,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:43,489 INFO L462 AbstractCegarLoop]: Abstraction has 867 states and 2013 transitions. [2019-12-27 23:25:43,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 23:25:43,490 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2013 transitions. [2019-12-27 23:25:43,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 23:25:43,491 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:43,491 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:43,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:43,695 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:43,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:43,696 INFO L82 PathProgramCache]: Analyzing trace with hash 978285180, now seen corresponding path program 4 times [2019-12-27 23:25:43,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:43,697 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764065288] [2019-12-27 23:25:43,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:43,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764065288] [2019-12-27 23:25:43,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098117669] [2019-12-27 23:25:43,860 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:43,907 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:25:43,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:43,908 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 23:25:43,909 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:44,022 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:44,022 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:44,023 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:44,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:44,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 23:25:44,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1696856678] [2019-12-27 23:25:44,029 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:44,033 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:44,039 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 41 states and 40 transitions. [2019-12-27 23:25:44,039 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:44,040 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:25:44,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:25:44,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:44,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:25:44,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:25:44,041 INFO L87 Difference]: Start difference. First operand 867 states and 2013 transitions. Second operand 10 states. [2019-12-27 23:25:44,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:44,329 INFO L93 Difference]: Finished difference Result 1355 states and 3102 transitions. [2019-12-27 23:25:44,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 23:25:44,330 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-12-27 23:25:44,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:44,336 INFO L225 Difference]: With dead ends: 1355 [2019-12-27 23:25:44,337 INFO L226 Difference]: Without dead ends: 1199 [2019-12-27 23:25:44,337 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2019-12-27 23:25:44,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2019-12-27 23:25:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 896. [2019-12-27 23:25:44,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 896 states. [2019-12-27 23:25:44,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2062 transitions. [2019-12-27 23:25:44,360 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2062 transitions. Word has length 40 [2019-12-27 23:25:44,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:44,361 INFO L462 AbstractCegarLoop]: Abstraction has 896 states and 2062 transitions. [2019-12-27 23:25:44,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:25:44,361 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2062 transitions. [2019-12-27 23:25:44,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 23:25:44,363 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:44,363 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:44,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:44,568 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:44,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:44,568 INFO L82 PathProgramCache]: Analyzing trace with hash 425329149, now seen corresponding path program 4 times [2019-12-27 23:25:44,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:44,570 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193596419] [2019-12-27 23:25:44,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:44,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193596419] [2019-12-27 23:25:44,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610007007] [2019-12-27 23:25:44,712 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:44,762 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:25:44,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:44,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 23:25:44,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:45,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:45,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:45,542 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:45,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:45,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 23:25:45,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1981387425] [2019-12-27 23:25:45,557 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:45,562 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:45,576 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 98 states and 154 transitions. [2019-12-27 23:25:45,576 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:45,577 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:25:45,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:25:45,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:45,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:25:45,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=183, Unknown=1, NotChecked=0, Total=240 [2019-12-27 23:25:45,578 INFO L87 Difference]: Start difference. First operand 896 states and 2062 transitions. Second operand 10 states. [2019-12-27 23:25:46,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:46,322 INFO L93 Difference]: Finished difference Result 1426 states and 3244 transitions. [2019-12-27 23:25:46,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 23:25:46,323 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-12-27 23:25:46,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:46,326 INFO L225 Difference]: With dead ends: 1426 [2019-12-27 23:25:46,327 INFO L226 Difference]: Without dead ends: 1319 [2019-12-27 23:25:46,327 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=146, Invalid=404, Unknown=2, NotChecked=0, Total=552 [2019-12-27 23:25:46,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2019-12-27 23:25:46,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 892. [2019-12-27 23:25:46,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2019-12-27 23:25:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2049 transitions. [2019-12-27 23:25:46,349 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2049 transitions. Word has length 40 [2019-12-27 23:25:46,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:46,349 INFO L462 AbstractCegarLoop]: Abstraction has 892 states and 2049 transitions. [2019-12-27 23:25:46,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:25:46,349 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2049 transitions. [2019-12-27 23:25:46,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 23:25:46,351 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:46,351 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:46,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:46,554 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:46,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:46,555 INFO L82 PathProgramCache]: Analyzing trace with hash -710950377, now seen corresponding path program 5 times [2019-12-27 23:25:46,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:46,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282685462] [2019-12-27 23:25:46,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:46,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282685462] [2019-12-27 23:25:46,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721945611] [2019-12-27 23:25:46,686 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:46,739 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:25:46,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:46,740 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 23:25:46,741 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:46,869 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:46,869 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:46,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:46,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:46,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 23:25:46,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1929494655] [2019-12-27 23:25:46,884 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:46,888 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:46,900 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 98 states and 154 transitions. [2019-12-27 23:25:46,900 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:46,901 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:25:46,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:25:46,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:46,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:25:46,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:25:46,902 INFO L87 Difference]: Start difference. First operand 892 states and 2049 transitions. Second operand 10 states. [2019-12-27 23:25:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:47,260 INFO L93 Difference]: Finished difference Result 1485 states and 3362 transitions. [2019-12-27 23:25:47,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 23:25:47,260 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-12-27 23:25:47,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:47,264 INFO L225 Difference]: With dead ends: 1485 [2019-12-27 23:25:47,264 INFO L226 Difference]: Without dead ends: 1378 [2019-12-27 23:25:47,265 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:25:47,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2019-12-27 23:25:47,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 908. [2019-12-27 23:25:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 908 states. [2019-12-27 23:25:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2089 transitions. [2019-12-27 23:25:47,286 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2089 transitions. Word has length 40 [2019-12-27 23:25:47,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:47,286 INFO L462 AbstractCegarLoop]: Abstraction has 908 states and 2089 transitions. [2019-12-27 23:25:47,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:25:47,286 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2089 transitions. [2019-12-27 23:25:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 23:25:47,288 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:47,288 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:47,490 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:47,490 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:47,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:47,491 INFO L82 PathProgramCache]: Analyzing trace with hash -701119347, now seen corresponding path program 6 times [2019-12-27 23:25:47,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:47,492 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040739483] [2019-12-27 23:25:47,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:47,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040739483] [2019-12-27 23:25:47,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44604333] [2019-12-27 23:25:47,634 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:47,679 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 23:25:47,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:47,680 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 23:25:47,681 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:47,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:47,841 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:47,848 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:47,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:47,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 23:25:47,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1764039084] [2019-12-27 23:25:47,856 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:47,861 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:47,877 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 98 states and 154 transitions. [2019-12-27 23:25:47,877 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:47,878 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:25:47,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:25:47,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:47,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:25:47,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:25:47,880 INFO L87 Difference]: Start difference. First operand 908 states and 2089 transitions. Second operand 10 states. [2019-12-27 23:25:48,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:48,249 INFO L93 Difference]: Finished difference Result 1473 states and 3342 transitions. [2019-12-27 23:25:48,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 23:25:48,250 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-12-27 23:25:48,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:48,252 INFO L225 Difference]: With dead ends: 1473 [2019-12-27 23:25:48,253 INFO L226 Difference]: Without dead ends: 1366 [2019-12-27 23:25:48,253 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:25:48,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2019-12-27 23:25:48,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 891. [2019-12-27 23:25:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 891 states. [2019-12-27 23:25:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2045 transitions. [2019-12-27 23:25:48,273 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2045 transitions. Word has length 40 [2019-12-27 23:25:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:48,273 INFO L462 AbstractCegarLoop]: Abstraction has 891 states and 2045 transitions. [2019-12-27 23:25:48,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:25:48,273 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2045 transitions. [2019-12-27 23:25:48,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 23:25:48,275 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:48,275 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:48,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:48,487 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:48,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:48,487 INFO L82 PathProgramCache]: Analyzing trace with hash 2054415665, now seen corresponding path program 7 times [2019-12-27 23:25:48,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:48,488 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876766468] [2019-12-27 23:25:48,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:48,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876766468] [2019-12-27 23:25:48,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139993845] [2019-12-27 23:25:48,629 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:48,704 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 23:25:48,705 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:48,867 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:48,868 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:48,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:48,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:48,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 23:25:48,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1562612968] [2019-12-27 23:25:48,883 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:48,892 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:48,924 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 98 states and 154 transitions. [2019-12-27 23:25:48,924 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:48,927 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 23:25:48,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:25:48,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:48,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:25:48,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:25:48,929 INFO L87 Difference]: Start difference. First operand 891 states and 2045 transitions. Second operand 10 states. [2019-12-27 23:25:49,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:49,400 INFO L93 Difference]: Finished difference Result 1504 states and 3400 transitions. [2019-12-27 23:25:49,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 23:25:49,400 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-12-27 23:25:49,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:49,404 INFO L225 Difference]: With dead ends: 1504 [2019-12-27 23:25:49,404 INFO L226 Difference]: Without dead ends: 1397 [2019-12-27 23:25:49,406 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:25:49,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2019-12-27 23:25:49,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 923. [2019-12-27 23:25:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 923 states. [2019-12-27 23:25:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2125 transitions. [2019-12-27 23:25:49,428 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2125 transitions. Word has length 40 [2019-12-27 23:25:49,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:49,429 INFO L462 AbstractCegarLoop]: Abstraction has 923 states and 2125 transitions. [2019-12-27 23:25:49,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:25:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2125 transitions. [2019-12-27 23:25:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 23:25:49,431 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:49,431 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:49,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:49,635 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:49,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:49,635 INFO L82 PathProgramCache]: Analyzing trace with hash 2064246695, now seen corresponding path program 8 times [2019-12-27 23:25:49,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:49,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231636547] [2019-12-27 23:25:49,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:49,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231636547] [2019-12-27 23:25:49,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552730912] [2019-12-27 23:25:49,773 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:49,820 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:25:49,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:49,821 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 23:25:49,822 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:51,086 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:51,086 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:51,088 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:51,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:51,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 23:25:51,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [213012512] [2019-12-27 23:25:51,097 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:51,101 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:51,114 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 98 states and 154 transitions. [2019-12-27 23:25:51,115 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:51,116 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 23:25:51,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:25:51,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:51,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:25:51,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=183, Unknown=2, NotChecked=0, Total=240 [2019-12-27 23:25:51,117 INFO L87 Difference]: Start difference. First operand 923 states and 2125 transitions. Second operand 10 states. [2019-12-27 23:25:52,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:52,293 INFO L93 Difference]: Finished difference Result 1442 states and 3284 transitions. [2019-12-27 23:25:52,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:25:52,294 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-12-27 23:25:52,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:52,297 INFO L225 Difference]: With dead ends: 1442 [2019-12-27 23:25:52,297 INFO L226 Difference]: Without dead ends: 1335 [2019-12-27 23:25:52,298 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=166, Invalid=480, Unknown=4, NotChecked=0, Total=650 [2019-12-27 23:25:52,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2019-12-27 23:25:52,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 907. [2019-12-27 23:25:52,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 907 states. [2019-12-27 23:25:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 2085 transitions. [2019-12-27 23:25:52,320 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 2085 transitions. Word has length 40 [2019-12-27 23:25:52,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:52,320 INFO L462 AbstractCegarLoop]: Abstraction has 907 states and 2085 transitions. [2019-12-27 23:25:52,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:25:52,321 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 2085 transitions. [2019-12-27 23:25:52,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 23:25:52,322 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:52,322 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:52,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:52,526 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:52,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:52,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1907400559, now seen corresponding path program 9 times [2019-12-27 23:25:52,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:52,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511910178] [2019-12-27 23:25:52,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:52,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511910178] [2019-12-27 23:25:52,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034825875] [2019-12-27 23:25:52,667 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:52,717 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:25:52,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:52,719 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 23:25:52,720 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:52,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:52,830 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:52,831 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:52,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:52,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 23:25:52,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1472832285] [2019-12-27 23:25:52,836 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:52,840 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:52,883 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 98 states and 154 transitions. [2019-12-27 23:25:52,884 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:52,885 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 23:25:52,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:25:52,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:52,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:25:52,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:25:52,886 INFO L87 Difference]: Start difference. First operand 907 states and 2085 transitions. Second operand 10 states. [2019-12-27 23:25:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:53,208 INFO L93 Difference]: Finished difference Result 1534 states and 3464 transitions. [2019-12-27 23:25:53,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:25:53,209 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-12-27 23:25:53,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:53,213 INFO L225 Difference]: With dead ends: 1534 [2019-12-27 23:25:53,213 INFO L226 Difference]: Without dead ends: 1427 [2019-12-27 23:25:53,214 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2019-12-27 23:25:53,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2019-12-27 23:25:53,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 923. [2019-12-27 23:25:53,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 923 states. [2019-12-27 23:25:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2125 transitions. [2019-12-27 23:25:53,233 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2125 transitions. Word has length 40 [2019-12-27 23:25:53,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:53,234 INFO L462 AbstractCegarLoop]: Abstraction has 923 states and 2125 transitions. [2019-12-27 23:25:53,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:25:53,234 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2125 transitions. [2019-12-27 23:25:53,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 23:25:53,236 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:53,236 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:53,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:53,439 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:53,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:53,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1454279449, now seen corresponding path program 10 times [2019-12-27 23:25:53,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:53,441 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313148362] [2019-12-27 23:25:53,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:53,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313148362] [2019-12-27 23:25:53,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934219659] [2019-12-27 23:25:53,572 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:53,617 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:25:53,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:53,617 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 23:25:53,618 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:53,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:53,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:53,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:53,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:53,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 23:25:53,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [428275051] [2019-12-27 23:25:53,743 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:53,747 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:53,764 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 98 states and 154 transitions. [2019-12-27 23:25:53,764 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:53,766 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 23:25:53,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:25:53,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:53,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:25:53,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:25:53,767 INFO L87 Difference]: Start difference. First operand 923 states and 2125 transitions. Second operand 10 states. [2019-12-27 23:25:54,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:54,108 INFO L93 Difference]: Finished difference Result 1482 states and 3364 transitions. [2019-12-27 23:25:54,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:25:54,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-12-27 23:25:54,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:54,113 INFO L225 Difference]: With dead ends: 1482 [2019-12-27 23:25:54,113 INFO L226 Difference]: Without dead ends: 1375 [2019-12-27 23:25:54,114 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2019-12-27 23:25:54,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2019-12-27 23:25:54,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 900. [2019-12-27 23:25:54,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 900 states. [2019-12-27 23:25:54,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2063 transitions. [2019-12-27 23:25:54,134 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2063 transitions. Word has length 40 [2019-12-27 23:25:54,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:54,135 INFO L462 AbstractCegarLoop]: Abstraction has 900 states and 2063 transitions. [2019-12-27 23:25:54,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:25:54,135 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2063 transitions. [2019-12-27 23:25:54,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 23:25:54,140 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:54,140 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:54,343 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:54,343 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:54,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:54,344 INFO L82 PathProgramCache]: Analyzing trace with hash -2081625269, now seen corresponding path program 5 times [2019-12-27 23:25:54,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:54,345 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837299053] [2019-12-27 23:25:54,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:54,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837299053] [2019-12-27 23:25:54,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590135784] [2019-12-27 23:25:54,461 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:54,506 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:25:54,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:54,508 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 23:25:54,509 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:54,611 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:54,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:54,619 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:54,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:54,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 23:25:54,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1615937755] [2019-12-27 23:25:54,625 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:54,629 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:54,649 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 137 states and 232 transitions. [2019-12-27 23:25:54,649 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:54,653 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 24 times. [2019-12-27 23:25:54,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:25:54,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:54,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:25:54,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:25:54,654 INFO L87 Difference]: Start difference. First operand 900 states and 2063 transitions. Second operand 10 states. [2019-12-27 23:25:54,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:54,984 INFO L93 Difference]: Finished difference Result 1487 states and 3387 transitions. [2019-12-27 23:25:54,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 23:25:54,984 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-12-27 23:25:54,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:54,987 INFO L225 Difference]: With dead ends: 1487 [2019-12-27 23:25:54,987 INFO L226 Difference]: Without dead ends: 1338 [2019-12-27 23:25:54,988 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:25:54,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2019-12-27 23:25:55,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 957. [2019-12-27 23:25:55,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 957 states. [2019-12-27 23:25:55,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 2191 transitions. [2019-12-27 23:25:55,008 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 2191 transitions. Word has length 40 [2019-12-27 23:25:55,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:55,008 INFO L462 AbstractCegarLoop]: Abstraction has 957 states and 2191 transitions. [2019-12-27 23:25:55,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:25:55,008 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 2191 transitions. [2019-12-27 23:25:55,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 23:25:55,010 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:55,010 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:55,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:55,213 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:55,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:55,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2071794239, now seen corresponding path program 6 times [2019-12-27 23:25:55,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:55,214 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215132186] [2019-12-27 23:25:55,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:55,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215132186] [2019-12-27 23:25:55,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331262884] [2019-12-27 23:25:55,334 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:55,389 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:25:55,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:55,390 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:25:55,391 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:55,491 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:55,492 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:55,494 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:55,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:55,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 23:25:55,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1741384354] [2019-12-27 23:25:55,500 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:55,505 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:55,528 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 134 states and 226 transitions. [2019-12-27 23:25:55,529 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:55,533 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 21 times. [2019-12-27 23:25:55,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:25:55,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:55,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:25:55,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:25:55,534 INFO L87 Difference]: Start difference. First operand 957 states and 2191 transitions. Second operand 10 states. [2019-12-27 23:25:55,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:55,867 INFO L93 Difference]: Finished difference Result 1546 states and 3484 transitions. [2019-12-27 23:25:55,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:25:55,867 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-12-27 23:25:55,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:55,869 INFO L225 Difference]: With dead ends: 1546 [2019-12-27 23:25:55,869 INFO L226 Difference]: Without dead ends: 1439 [2019-12-27 23:25:55,869 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2019-12-27 23:25:55,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2019-12-27 23:25:55,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 953. [2019-12-27 23:25:55,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2019-12-27 23:25:55,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 2178 transitions. [2019-12-27 23:25:55,889 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 2178 transitions. Word has length 40 [2019-12-27 23:25:55,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:55,889 INFO L462 AbstractCegarLoop]: Abstraction has 953 states and 2178 transitions. [2019-12-27 23:25:55,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:25:55,889 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 2178 transitions. [2019-12-27 23:25:55,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 23:25:55,891 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:55,891 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:56,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:56,095 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:56,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:56,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1748474197, now seen corresponding path program 11 times [2019-12-27 23:25:56,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:56,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787066928] [2019-12-27 23:25:56,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:56,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787066928] [2019-12-27 23:25:56,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583862666] [2019-12-27 23:25:56,229 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:56,276 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:25:56,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:56,278 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 23:25:56,278 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:56,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:56,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:56,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:56,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:56,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 23:25:56,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1726595373] [2019-12-27 23:25:56,418 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:56,423 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:56,440 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 122 states and 202 transitions. [2019-12-27 23:25:56,440 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:56,443 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 17 times. [2019-12-27 23:25:56,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:25:56,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:56,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:25:56,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:25:56,444 INFO L87 Difference]: Start difference. First operand 953 states and 2178 transitions. Second operand 10 states. [2019-12-27 23:25:56,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:56,827 INFO L93 Difference]: Finished difference Result 1607 states and 3606 transitions. [2019-12-27 23:25:56,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:25:56,827 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-12-27 23:25:56,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:56,829 INFO L225 Difference]: With dead ends: 1607 [2019-12-27 23:25:56,829 INFO L226 Difference]: Without dead ends: 1500 [2019-12-27 23:25:56,829 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2019-12-27 23:25:56,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2019-12-27 23:25:56,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 969. [2019-12-27 23:25:56,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 969 states. [2019-12-27 23:25:56,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 2218 transitions. [2019-12-27 23:25:56,848 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 2218 transitions. Word has length 40 [2019-12-27 23:25:56,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:56,849 INFO L462 AbstractCegarLoop]: Abstraction has 969 states and 2218 transitions. [2019-12-27 23:25:56,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:25:56,849 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 2218 transitions. [2019-12-27 23:25:56,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 23:25:56,851 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:56,851 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:57,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:57,054 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:57,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:57,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1295353087, now seen corresponding path program 12 times [2019-12-27 23:25:57,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:57,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116741752] [2019-12-27 23:25:57,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:57,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116741752] [2019-12-27 23:25:57,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368319631] [2019-12-27 23:25:57,197 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:57,256 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 23:25:57,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:57,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 23:25:57,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:57,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:57,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:57,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:57,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:57,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 23:25:57,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [687103311] [2019-12-27 23:25:57,418 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:57,421 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:57,439 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 122 states and 202 transitions. [2019-12-27 23:25:57,439 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:57,442 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 18 times. [2019-12-27 23:25:57,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:25:57,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:57,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:25:57,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:25:57,443 INFO L87 Difference]: Start difference. First operand 969 states and 2218 transitions. Second operand 10 states. [2019-12-27 23:25:57,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:57,771 INFO L93 Difference]: Finished difference Result 1595 states and 3586 transitions. [2019-12-27 23:25:57,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:25:57,772 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-12-27 23:25:57,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:57,774 INFO L225 Difference]: With dead ends: 1595 [2019-12-27 23:25:57,774 INFO L226 Difference]: Without dead ends: 1488 [2019-12-27 23:25:57,774 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2019-12-27 23:25:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2019-12-27 23:25:57,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 949. [2019-12-27 23:25:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 949 states. [2019-12-27 23:25:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 2165 transitions. [2019-12-27 23:25:57,793 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 2165 transitions. Word has length 40 [2019-12-27 23:25:57,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:57,793 INFO L462 AbstractCegarLoop]: Abstraction has 949 states and 2165 transitions. [2019-12-27 23:25:57,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:25:57,793 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 2165 transitions. [2019-12-27 23:25:57,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 23:25:57,795 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:57,795 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:57,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:57,998 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:57,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:57,999 INFO L82 PathProgramCache]: Analyzing trace with hash -52709717, now seen corresponding path program 13 times [2019-12-27 23:25:57,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:57,999 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551168889] [2019-12-27 23:25:58,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:58,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551168889] [2019-12-27 23:25:58,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947113409] [2019-12-27 23:25:58,125 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:58,206 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 23:25:58,207 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:58,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:58,336 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:58,338 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:58,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:58,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 23:25:58,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1767089837] [2019-12-27 23:25:58,343 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:58,346 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:58,361 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 110 states and 178 transitions. [2019-12-27 23:25:58,361 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:58,364 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 14 times. [2019-12-27 23:25:58,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:25:58,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:58,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:25:58,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:25:58,365 INFO L87 Difference]: Start difference. First operand 949 states and 2165 transitions. Second operand 10 states. [2019-12-27 23:25:58,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:58,748 INFO L93 Difference]: Finished difference Result 1647 states and 3686 transitions. [2019-12-27 23:25:58,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:25:58,750 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-12-27 23:25:58,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:58,752 INFO L225 Difference]: With dead ends: 1647 [2019-12-27 23:25:58,753 INFO L226 Difference]: Without dead ends: 1540 [2019-12-27 23:25:58,753 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:25:58,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2019-12-27 23:25:58,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 981. [2019-12-27 23:25:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 981 states. [2019-12-27 23:25:58,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 2245 transitions. [2019-12-27 23:25:58,765 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 2245 transitions. Word has length 40 [2019-12-27 23:25:58,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:58,765 INFO L462 AbstractCegarLoop]: Abstraction has 981 states and 2245 transitions. [2019-12-27 23:25:58,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:25:58,766 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 2245 transitions. [2019-12-27 23:25:58,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 23:25:58,767 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:58,767 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:58,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:58,969 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:58,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:58,970 INFO L82 PathProgramCache]: Analyzing trace with hash -42878687, now seen corresponding path program 14 times [2019-12-27 23:25:58,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:58,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471225960] [2019-12-27 23:25:58,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:59,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471225960] [2019-12-27 23:25:59,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744604888] [2019-12-27 23:25:59,107 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:25:59,154 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:25:59,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:25:59,155 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 23:25:59,156 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:25:59,267 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:59,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:25:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:59,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:25:59,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 23:25:59,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1103303821] [2019-12-27 23:25:59,272 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:25:59,275 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:25:59,288 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 110 states and 178 transitions. [2019-12-27 23:25:59,288 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:25:59,291 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 14 times. [2019-12-27 23:25:59,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:25:59,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:25:59,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:25:59,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:25:59,292 INFO L87 Difference]: Start difference. First operand 981 states and 2245 transitions. Second operand 10 states. [2019-12-27 23:25:59,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:25:59,642 INFO L93 Difference]: Finished difference Result 1675 states and 3746 transitions. [2019-12-27 23:25:59,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:25:59,643 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-12-27 23:25:59,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:25:59,644 INFO L225 Difference]: With dead ends: 1675 [2019-12-27 23:25:59,644 INFO L226 Difference]: Without dead ends: 1568 [2019-12-27 23:25:59,645 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:25:59,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2019-12-27 23:25:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 965. [2019-12-27 23:25:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 965 states. [2019-12-27 23:25:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 2205 transitions. [2019-12-27 23:25:59,658 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 2205 transitions. Word has length 40 [2019-12-27 23:25:59,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:25:59,658 INFO L462 AbstractCegarLoop]: Abstraction has 965 states and 2205 transitions. [2019-12-27 23:25:59,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:25:59,658 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 2205 transitions. [2019-12-27 23:25:59,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 23:25:59,660 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:25:59,660 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:25:59,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:25:59,861 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:25:59,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:25:59,862 INFO L82 PathProgramCache]: Analyzing trace with hash 285692907, now seen corresponding path program 15 times [2019-12-27 23:25:59,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:25:59,863 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462460901] [2019-12-27 23:25:59,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:25:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:25:59,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:25:59,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462460901] [2019-12-27 23:25:59,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478320116] [2019-12-27 23:25:59,992 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:00,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:26:00,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:00,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 23:26:00,041 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:00,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:00,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:00,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:00,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:00,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 23:26:00,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1496066581] [2019-12-27 23:26:00,169 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:00,172 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:00,186 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 110 states and 178 transitions. [2019-12-27 23:26:00,187 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:00,189 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 14 times. [2019-12-27 23:26:00,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:26:00,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:00,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:26:00,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:26:00,190 INFO L87 Difference]: Start difference. First operand 965 states and 2205 transitions. Second operand 10 states. [2019-12-27 23:26:00,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:00,743 INFO L93 Difference]: Finished difference Result 1647 states and 3686 transitions. [2019-12-27 23:26:00,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:26:00,744 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-12-27 23:26:00,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:00,747 INFO L225 Difference]: With dead ends: 1647 [2019-12-27 23:26:00,747 INFO L226 Difference]: Without dead ends: 1540 [2019-12-27 23:26:00,751 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:26:00,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2019-12-27 23:26:00,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 981. [2019-12-27 23:26:00,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 981 states. [2019-12-27 23:26:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 2245 transitions. [2019-12-27 23:26:00,784 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 2245 transitions. Word has length 40 [2019-12-27 23:26:00,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:00,784 INFO L462 AbstractCegarLoop]: Abstraction has 981 states and 2245 transitions. [2019-12-27 23:26:00,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:26:00,785 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 2245 transitions. [2019-12-27 23:26:00,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 23:26:00,787 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:00,787 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:00,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:00,990 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:00,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:00,991 INFO L82 PathProgramCache]: Analyzing trace with hash 738814017, now seen corresponding path program 16 times [2019-12-27 23:26:00,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:00,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297269109] [2019-12-27 23:26:00,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:01,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297269109] [2019-12-27 23:26:01,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651202158] [2019-12-27 23:26:01,227 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:01,310 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:26:01,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:01,311 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 23:26:01,313 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:01,451 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:01,452 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:01,454 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:01,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:01,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 23:26:01,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1121402392] [2019-12-27 23:26:01,461 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:01,465 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:01,485 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 110 states and 178 transitions. [2019-12-27 23:26:01,486 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:01,488 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 15 times. [2019-12-27 23:26:01,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:26:01,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:01,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:26:01,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:26:01,490 INFO L87 Difference]: Start difference. First operand 981 states and 2245 transitions. Second operand 10 states. [2019-12-27 23:26:01,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:01,809 INFO L93 Difference]: Finished difference Result 1548 states and 3488 transitions. [2019-12-27 23:26:01,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:26:01,810 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-12-27 23:26:01,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:01,812 INFO L225 Difference]: With dead ends: 1548 [2019-12-27 23:26:01,813 INFO L226 Difference]: Without dead ends: 1441 [2019-12-27 23:26:01,813 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:26:01,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2019-12-27 23:26:01,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 966. [2019-12-27 23:26:01,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 966 states. [2019-12-27 23:26:01,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 2191 transitions. [2019-12-27 23:26:01,827 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 2191 transitions. Word has length 40 [2019-12-27 23:26:01,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:01,828 INFO L462 AbstractCegarLoop]: Abstraction has 966 states and 2191 transitions. [2019-12-27 23:26:01,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:26:01,828 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 2191 transitions. [2019-12-27 23:26:01,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:01,830 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:01,830 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:02,033 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:02,033 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:02,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:02,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1962080961, now seen corresponding path program 5 times [2019-12-27 23:26:02,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:02,034 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750293529] [2019-12-27 23:26:02,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:02,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750293529] [2019-12-27 23:26:02,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499768204] [2019-12-27 23:26:02,140 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:02,211 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-27 23:26:02,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:02,212 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 23:26:02,214 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:02,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 23:26:02,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2019-12-27 23:26:02,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1805509630] [2019-12-27 23:26:02,244 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:02,254 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:02,263 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 45 states and 44 transitions. [2019-12-27 23:26:02,264 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:02,264 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:26:02,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:26:02,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:02,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:26:02,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:26:02,266 INFO L87 Difference]: Start difference. First operand 966 states and 2191 transitions. Second operand 13 states. [2019-12-27 23:26:02,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:02,497 INFO L93 Difference]: Finished difference Result 1622 states and 3947 transitions. [2019-12-27 23:26:02,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 23:26:02,497 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2019-12-27 23:26:02,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:02,499 INFO L225 Difference]: With dead ends: 1622 [2019-12-27 23:26:02,500 INFO L226 Difference]: Without dead ends: 1541 [2019-12-27 23:26:02,501 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:26:02,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2019-12-27 23:26:02,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1541. [2019-12-27 23:26:02,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1541 states. [2019-12-27 23:26:02,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 3788 transitions. [2019-12-27 23:26:02,532 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 3788 transitions. Word has length 44 [2019-12-27 23:26:02,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:02,533 INFO L462 AbstractCegarLoop]: Abstraction has 1541 states and 3788 transitions. [2019-12-27 23:26:02,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:26:02,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 3788 transitions. [2019-12-27 23:26:02,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:02,535 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:02,535 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:02,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:02,739 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:02,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:02,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1319106504, now seen corresponding path program 5 times [2019-12-27 23:26:02,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:02,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753618034] [2019-12-27 23:26:02,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:02,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753618034] [2019-12-27 23:26:02,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521531862] [2019-12-27 23:26:02,875 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:02,923 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 23:26:02,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:02,924 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:02,925 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:03,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:03,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:03,047 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:03,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:03,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:03,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [572902744] [2019-12-27 23:26:03,082 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:03,088 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:03,132 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 114 states and 182 transitions. [2019-12-27 23:26:03,132 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:03,133 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:26:03,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:03,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:03,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:03,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:03,133 INFO L87 Difference]: Start difference. First operand 1541 states and 3788 transitions. Second operand 11 states. [2019-12-27 23:26:03,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:03,383 INFO L93 Difference]: Finished difference Result 1863 states and 4455 transitions. [2019-12-27 23:26:03,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 23:26:03,384 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:03,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:03,386 INFO L225 Difference]: With dead ends: 1863 [2019-12-27 23:26:03,386 INFO L226 Difference]: Without dead ends: 1744 [2019-12-27 23:26:03,387 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:26:03,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2019-12-27 23:26:03,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1548. [2019-12-27 23:26:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1548 states. [2019-12-27 23:26:03,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 3805 transitions. [2019-12-27 23:26:03,406 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 3805 transitions. Word has length 44 [2019-12-27 23:26:03,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:03,406 INFO L462 AbstractCegarLoop]: Abstraction has 1548 states and 3805 transitions. [2019-12-27 23:26:03,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:03,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 3805 transitions. [2019-12-27 23:26:03,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:03,408 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:03,408 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:03,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:03,611 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:03,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:03,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1779930304, now seen corresponding path program 6 times [2019-12-27 23:26:03,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:03,613 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637390438] [2019-12-27 23:26:03,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:03,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637390438] [2019-12-27 23:26:03,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943323297] [2019-12-27 23:26:03,744 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:03,793 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:26:03,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:03,794 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:03,794 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:04,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:04,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:04,464 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:04,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:04,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:04,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [837183566] [2019-12-27 23:26:04,471 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:04,474 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:04,491 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 114 states and 182 transitions. [2019-12-27 23:26:04,491 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:04,492 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:26:04,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:04,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:04,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:04,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=236, Unknown=1, NotChecked=0, Total=306 [2019-12-27 23:26:04,494 INFO L87 Difference]: Start difference. First operand 1548 states and 3805 transitions. Second operand 11 states. [2019-12-27 23:26:06,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:06,231 INFO L93 Difference]: Finished difference Result 2167 states and 5124 transitions. [2019-12-27 23:26:06,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 23:26:06,232 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:06,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:06,235 INFO L225 Difference]: With dead ends: 2167 [2019-12-27 23:26:06,235 INFO L226 Difference]: Without dead ends: 1980 [2019-12-27 23:26:06,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=169, Invalid=477, Unknown=4, NotChecked=0, Total=650 [2019-12-27 23:26:06,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2019-12-27 23:26:06,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1564. [2019-12-27 23:26:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1564 states. [2019-12-27 23:26:06,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 3841 transitions. [2019-12-27 23:26:06,257 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 3841 transitions. Word has length 44 [2019-12-27 23:26:06,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:06,257 INFO L462 AbstractCegarLoop]: Abstraction has 1564 states and 3841 transitions. [2019-12-27 23:26:06,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:06,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 3841 transitions. [2019-12-27 23:26:06,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:06,260 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:06,260 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:06,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:06,463 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:06,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:06,464 INFO L82 PathProgramCache]: Analyzing trace with hash 643650778, now seen corresponding path program 17 times [2019-12-27 23:26:06,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:06,465 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451623812] [2019-12-27 23:26:06,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:06,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451623812] [2019-12-27 23:26:06,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431811224] [2019-12-27 23:26:06,601 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:06,644 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:26:06,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:06,645 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:06,646 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:06,842 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:06,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:06,849 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:06,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:06,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:06,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1215908170] [2019-12-27 23:26:06,856 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:06,859 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:06,878 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 114 states and 182 transitions. [2019-12-27 23:26:06,878 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:06,879 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:26:06,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:06,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:06,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:06,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:06,880 INFO L87 Difference]: Start difference. First operand 1564 states and 3841 transitions. Second operand 11 states. [2019-12-27 23:26:07,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:07,258 INFO L93 Difference]: Finished difference Result 2359 states and 5537 transitions. [2019-12-27 23:26:07,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 23:26:07,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:07,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:07,260 INFO L225 Difference]: With dead ends: 2359 [2019-12-27 23:26:07,261 INFO L226 Difference]: Without dead ends: 2168 [2019-12-27 23:26:07,261 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:26:07,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2019-12-27 23:26:07,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1580. [2019-12-27 23:26:07,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1580 states. [2019-12-27 23:26:07,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 3881 transitions. [2019-12-27 23:26:07,285 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 3881 transitions. Word has length 44 [2019-12-27 23:26:07,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:07,285 INFO L462 AbstractCegarLoop]: Abstraction has 1580 states and 3881 transitions. [2019-12-27 23:26:07,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:07,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 3881 transitions. [2019-12-27 23:26:07,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:07,287 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:07,287 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:07,490 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:07,491 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:07,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:07,491 INFO L82 PathProgramCache]: Analyzing trace with hash 653481808, now seen corresponding path program 18 times [2019-12-27 23:26:07,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:07,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115710632] [2019-12-27 23:26:07,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:07,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115710632] [2019-12-27 23:26:07,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869549101] [2019-12-27 23:26:07,633 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:07,679 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:26:07,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:07,680 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-27 23:26:07,681 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:07,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:07,812 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:07,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:07,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:07,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2019-12-27 23:26:07,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1342150316] [2019-12-27 23:26:07,827 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:07,832 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:07,857 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 114 states and 182 transitions. [2019-12-27 23:26:07,857 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:07,859 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:26:07,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:07,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:07,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:07,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:26:07,860 INFO L87 Difference]: Start difference. First operand 1580 states and 3881 transitions. Second operand 11 states. [2019-12-27 23:26:08,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:08,172 INFO L93 Difference]: Finished difference Result 2167 states and 5092 transitions. [2019-12-27 23:26:08,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 23:26:08,172 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:08,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:08,174 INFO L225 Difference]: With dead ends: 2167 [2019-12-27 23:26:08,175 INFO L226 Difference]: Without dead ends: 2032 [2019-12-27 23:26:08,175 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2019-12-27 23:26:08,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2019-12-27 23:26:08,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1596. [2019-12-27 23:26:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1596 states. [2019-12-27 23:26:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 3921 transitions. [2019-12-27 23:26:08,193 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 3921 transitions. Word has length 44 [2019-12-27 23:26:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:08,194 INFO L462 AbstractCegarLoop]: Abstraction has 1596 states and 3921 transitions. [2019-12-27 23:26:08,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 3921 transitions. [2019-12-27 23:26:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:08,195 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:08,195 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:08,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:08,396 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:08,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:08,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1152259008, now seen corresponding path program 7 times [2019-12-27 23:26:08,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:08,398 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933929641] [2019-12-27 23:26:08,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:08,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933929641] [2019-12-27 23:26:08,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119145692] [2019-12-27 23:26:08,531 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:08,578 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:08,579 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:10,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:10,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:10,336 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:10,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:10,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:10,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2108212022] [2019-12-27 23:26:10,345 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:10,350 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:10,370 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 102 states and 158 transitions. [2019-12-27 23:26:10,370 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:10,371 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:26:10,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:10,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:10,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:10,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=234, Unknown=2, NotChecked=0, Total=306 [2019-12-27 23:26:10,372 INFO L87 Difference]: Start difference. First operand 1596 states and 3921 transitions. Second operand 11 states. [2019-12-27 23:26:11,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:11,997 INFO L93 Difference]: Finished difference Result 2155 states and 5055 transitions. [2019-12-27 23:26:11,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 23:26:11,997 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:11,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:11,999 INFO L225 Difference]: With dead ends: 2155 [2019-12-27 23:26:11,999 INFO L226 Difference]: Without dead ends: 2012 [2019-12-27 23:26:12,000 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=184, Invalid=514, Unknown=4, NotChecked=0, Total=702 [2019-12-27 23:26:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2019-12-27 23:26:12,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1580. [2019-12-27 23:26:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1580 states. [2019-12-27 23:26:12,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 3877 transitions. [2019-12-27 23:26:12,025 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 3877 transitions. Word has length 44 [2019-12-27 23:26:12,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:12,025 INFO L462 AbstractCegarLoop]: Abstraction has 1580 states and 3877 transitions. [2019-12-27 23:26:12,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:12,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 3877 transitions. [2019-12-27 23:26:12,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:12,027 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:12,027 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:12,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:12,230 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:12,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:12,231 INFO L82 PathProgramCache]: Analyzing trace with hash -885950476, now seen corresponding path program 19 times [2019-12-27 23:26:12,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:12,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550029370] [2019-12-27 23:26:12,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:12,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550029370] [2019-12-27 23:26:12,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303096265] [2019-12-27 23:26:12,357 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:12,401 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:12,403 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:12,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:12,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:12,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:12,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:12,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:12,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [332530543] [2019-12-27 23:26:12,575 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:12,580 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:12,603 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 114 states and 182 transitions. [2019-12-27 23:26:12,603 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:12,605 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 23:26:12,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:12,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:12,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:12,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:12,606 INFO L87 Difference]: Start difference. First operand 1580 states and 3877 transitions. Second operand 11 states. [2019-12-27 23:26:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:13,029 INFO L93 Difference]: Finished difference Result 2503 states and 5844 transitions. [2019-12-27 23:26:13,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:26:13,029 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:13,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:13,032 INFO L225 Difference]: With dead ends: 2503 [2019-12-27 23:26:13,032 INFO L226 Difference]: Without dead ends: 2284 [2019-12-27 23:26:13,032 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2019-12-27 23:26:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2019-12-27 23:26:13,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 1612. [2019-12-27 23:26:13,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1612 states. [2019-12-27 23:26:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 3957 transitions. [2019-12-27 23:26:13,060 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 3957 transitions. Word has length 44 [2019-12-27 23:26:13,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:13,060 INFO L462 AbstractCegarLoop]: Abstraction has 1612 states and 3957 transitions. [2019-12-27 23:26:13,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:13,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 3957 transitions. [2019-12-27 23:26:13,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:13,064 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:13,064 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:13,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:13,268 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:13,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:13,269 INFO L82 PathProgramCache]: Analyzing trace with hash -876119446, now seen corresponding path program 20 times [2019-12-27 23:26:13,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:13,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874432813] [2019-12-27 23:26:13,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:13,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874432813] [2019-12-27 23:26:13,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033808359] [2019-12-27 23:26:13,420 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:13,467 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:26:13,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:13,468 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:13,471 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:13,644 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:13,644 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:13,652 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:13,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:13,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:13,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [319708181] [2019-12-27 23:26:13,658 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:13,661 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:13,677 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 114 states and 182 transitions. [2019-12-27 23:26:13,678 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:13,679 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 23:26:13,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:13,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:13,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:13,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:13,680 INFO L87 Difference]: Start difference. First operand 1612 states and 3957 transitions. Second operand 11 states. [2019-12-27 23:26:14,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:14,098 INFO L93 Difference]: Finished difference Result 2367 states and 5527 transitions. [2019-12-27 23:26:14,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:26:14,098 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:14,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:14,100 INFO L225 Difference]: With dead ends: 2367 [2019-12-27 23:26:14,100 INFO L226 Difference]: Without dead ends: 2204 [2019-12-27 23:26:14,100 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2019-12-27 23:26:14,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2019-12-27 23:26:14,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1628. [2019-12-27 23:26:14,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1628 states. [2019-12-27 23:26:14,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 3997 transitions. [2019-12-27 23:26:14,118 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 3997 transitions. Word has length 44 [2019-12-27 23:26:14,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:14,118 INFO L462 AbstractCegarLoop]: Abstraction has 1628 states and 3997 transitions. [2019-12-27 23:26:14,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:14,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 3997 transitions. [2019-12-27 23:26:14,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:14,120 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:14,120 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:14,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:14,321 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:14,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:14,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1613107034, now seen corresponding path program 21 times [2019-12-27 23:26:14,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:14,322 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857031998] [2019-12-27 23:26:14,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:14,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857031998] [2019-12-27 23:26:14,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020475803] [2019-12-27 23:26:14,467 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:14,519 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:26:14,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:14,520 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:14,520 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:14,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:14,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:14,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:14,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:14,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:14,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [773827188] [2019-12-27 23:26:14,733 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:14,737 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:14,760 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 102 states and 158 transitions. [2019-12-27 23:26:14,760 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:14,761 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:26:14,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:14,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:14,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:14,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:14,763 INFO L87 Difference]: Start difference. First operand 1628 states and 3997 transitions. Second operand 11 states. [2019-12-27 23:26:15,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:15,258 INFO L93 Difference]: Finished difference Result 2315 states and 5424 transitions. [2019-12-27 23:26:15,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:26:15,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:15,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:15,261 INFO L225 Difference]: With dead ends: 2315 [2019-12-27 23:26:15,262 INFO L226 Difference]: Without dead ends: 2180 [2019-12-27 23:26:15,262 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2019-12-27 23:26:15,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2019-12-27 23:26:15,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1596. [2019-12-27 23:26:15,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1596 states. [2019-12-27 23:26:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 3917 transitions. [2019-12-27 23:26:15,293 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 3917 transitions. Word has length 44 [2019-12-27 23:26:15,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:15,293 INFO L462 AbstractCegarLoop]: Abstraction has 1596 states and 3917 transitions. [2019-12-27 23:26:15,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:15,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 3917 transitions. [2019-12-27 23:26:15,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:15,295 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:15,295 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:15,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:15,499 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:15,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:15,499 INFO L82 PathProgramCache]: Analyzing trace with hash -552799404, now seen corresponding path program 22 times [2019-12-27 23:26:15,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:15,500 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397877494] [2019-12-27 23:26:15,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:15,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397877494] [2019-12-27 23:26:15,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061185381] [2019-12-27 23:26:15,639 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:15,687 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:26:15,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:15,688 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:15,689 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:15,915 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:15,916 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:15,918 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:15,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:15,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:15,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1202698295] [2019-12-27 23:26:15,926 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:15,928 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:15,946 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 114 states and 182 transitions. [2019-12-27 23:26:15,946 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:15,948 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 23:26:15,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:15,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:15,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:15,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:15,949 INFO L87 Difference]: Start difference. First operand 1596 states and 3917 transitions. Second operand 11 states. [2019-12-27 23:26:16,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:16,360 INFO L93 Difference]: Finished difference Result 2407 states and 5641 transitions. [2019-12-27 23:26:16,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:26:16,361 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:16,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:16,363 INFO L225 Difference]: With dead ends: 2407 [2019-12-27 23:26:16,363 INFO L226 Difference]: Without dead ends: 2216 [2019-12-27 23:26:16,364 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2019-12-27 23:26:16,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2019-12-27 23:26:16,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 1612. [2019-12-27 23:26:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1612 states. [2019-12-27 23:26:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 3957 transitions. [2019-12-27 23:26:16,383 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 3957 transitions. Word has length 44 [2019-12-27 23:26:16,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:16,384 INFO L462 AbstractCegarLoop]: Abstraction has 1612 states and 3957 transitions. [2019-12-27 23:26:16,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:16,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 3957 transitions. [2019-12-27 23:26:16,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:16,385 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:16,385 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:16,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:16,588 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:16,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:16,589 INFO L82 PathProgramCache]: Analyzing trace with hash -99678294, now seen corresponding path program 23 times [2019-12-27 23:26:16,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:16,590 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414870981] [2019-12-27 23:26:16,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:16,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414870981] [2019-12-27 23:26:16,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651093734] [2019-12-27 23:26:16,733 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:16,779 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:26:16,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:16,780 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:16,782 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:21,048 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:21,049 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:21,051 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:21,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:21,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:21,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [781760477] [2019-12-27 23:26:21,063 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:21,066 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:21,084 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 114 states and 182 transitions. [2019-12-27 23:26:21,084 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:21,086 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 23:26:21,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:21,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:21,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:21,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:21,087 INFO L87 Difference]: Start difference. First operand 1612 states and 3957 transitions. Second operand 11 states. [2019-12-27 23:26:23,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:23,535 INFO L93 Difference]: Finished difference Result 2227 states and 5224 transitions. [2019-12-27 23:26:23,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:26:23,535 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:23,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:23,538 INFO L225 Difference]: With dead ends: 2227 [2019-12-27 23:26:23,538 INFO L226 Difference]: Without dead ends: 2092 [2019-12-27 23:26:23,538 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=195, Invalid=560, Unknown=1, NotChecked=0, Total=756 [2019-12-27 23:26:23,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2019-12-27 23:26:23,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1628. [2019-12-27 23:26:23,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1628 states. [2019-12-27 23:26:23,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 3997 transitions. [2019-12-27 23:26:23,560 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 3997 transitions. Word has length 44 [2019-12-27 23:26:23,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:23,560 INFO L462 AbstractCegarLoop]: Abstraction has 1628 states and 3997 transitions. [2019-12-27 23:26:23,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:23,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 3997 transitions. [2019-12-27 23:26:23,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:23,562 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:23,562 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:23,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:23,766 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:23,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:23,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1332444224, now seen corresponding path program 8 times [2019-12-27 23:26:23,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:23,767 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7579460] [2019-12-27 23:26:23,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:23,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7579460] [2019-12-27 23:26:23,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763392416] [2019-12-27 23:26:23,910 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:23,956 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:26:23,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:23,957 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:23,958 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:24,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:24,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:24,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:24,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:24,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:24,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [963756740] [2019-12-27 23:26:24,172 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:24,174 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:24,187 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 90 states and 134 transitions. [2019-12-27 23:26:24,187 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:24,188 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:26:24,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:24,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:24,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:24,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:24,189 INFO L87 Difference]: Start difference. First operand 1628 states and 3997 transitions. Second operand 11 states. [2019-12-27 23:26:24,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:24,570 INFO L93 Difference]: Finished difference Result 2215 states and 5187 transitions. [2019-12-27 23:26:24,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:26:24,570 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:24,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:24,572 INFO L225 Difference]: With dead ends: 2215 [2019-12-27 23:26:24,572 INFO L226 Difference]: Without dead ends: 2060 [2019-12-27 23:26:24,573 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2019-12-27 23:26:24,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2019-12-27 23:26:24,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1596. [2019-12-27 23:26:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1596 states. [2019-12-27 23:26:24,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 3913 transitions. [2019-12-27 23:26:24,591 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 3913 transitions. Word has length 44 [2019-12-27 23:26:24,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:24,592 INFO L462 AbstractCegarLoop]: Abstraction has 1596 states and 3913 transitions. [2019-12-27 23:26:24,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:24,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 3913 transitions. [2019-12-27 23:26:24,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:24,593 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:24,593 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:24,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:24,794 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:24,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:24,795 INFO L82 PathProgramCache]: Analyzing trace with hash -727024114, now seen corresponding path program 24 times [2019-12-27 23:26:24,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:24,796 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374291218] [2019-12-27 23:26:24,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:24,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374291218] [2019-12-27 23:26:24,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564056747] [2019-12-27 23:26:24,919 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:24,969 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:26:24,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:24,970 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:24,971 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:25,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:25,188 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:25,191 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:25,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:25,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:25,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1073032188] [2019-12-27 23:26:25,200 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:25,205 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:25,236 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 114 states and 182 transitions. [2019-12-27 23:26:25,236 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:25,238 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 23:26:25,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:25,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:25,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:25,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:25,239 INFO L87 Difference]: Start difference. First operand 1596 states and 3913 transitions. Second operand 11 states. [2019-12-27 23:26:25,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:25,619 INFO L93 Difference]: Finished difference Result 2463 states and 5759 transitions. [2019-12-27 23:26:25,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:26:25,619 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:25,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:25,622 INFO L225 Difference]: With dead ends: 2463 [2019-12-27 23:26:25,622 INFO L226 Difference]: Without dead ends: 2216 [2019-12-27 23:26:25,622 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:26:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2019-12-27 23:26:25,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 1644. [2019-12-27 23:26:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1644 states. [2019-12-27 23:26:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 4033 transitions. [2019-12-27 23:26:25,643 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 4033 transitions. Word has length 44 [2019-12-27 23:26:25,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:25,643 INFO L462 AbstractCegarLoop]: Abstraction has 1644 states and 4033 transitions. [2019-12-27 23:26:25,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:25,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 4033 transitions. [2019-12-27 23:26:25,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:25,644 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:25,644 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:25,845 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:25,845 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:25,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:25,846 INFO L82 PathProgramCache]: Analyzing trace with hash -717193084, now seen corresponding path program 25 times [2019-12-27 23:26:25,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:25,847 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328486880] [2019-12-27 23:26:25,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:25,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328486880] [2019-12-27 23:26:25,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947163995] [2019-12-27 23:26:25,983 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:26,029 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:26,030 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:26,611 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_93 Int)) (and (<= (div (+ (* v_~i~0_93 (- 1)) 1) (- 3)) 2) (<= c_~i~0 (+ v_~i~0_93 c_~j~0)) (<= c_~j~0 (+ v_~i~0_93 2)))) is different from true [2019-12-27 23:26:26,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:26,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:26,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:26,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:26,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:26,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1146465808] [2019-12-27 23:26:26,629 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:26,632 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:26,650 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 114 states and 182 transitions. [2019-12-27 23:26:26,650 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:26,651 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 23:26:26,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:26,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:26,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:26,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=212, Unknown=1, NotChecked=30, Total=306 [2019-12-27 23:26:26,652 INFO L87 Difference]: Start difference. First operand 1644 states and 4033 transitions. Second operand 11 states. [2019-12-27 23:26:27,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:27,007 INFO L93 Difference]: Finished difference Result 2383 states and 5570 transitions. [2019-12-27 23:26:27,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:26:27,008 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:27,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:27,010 INFO L225 Difference]: With dead ends: 2383 [2019-12-27 23:26:27,010 INFO L226 Difference]: Without dead ends: 2192 [2019-12-27 23:26:27,010 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=183, Invalid=522, Unknown=1, NotChecked=50, Total=756 [2019-12-27 23:26:27,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2019-12-27 23:26:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1660. [2019-12-27 23:26:27,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1660 states. [2019-12-27 23:26:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 4073 transitions. [2019-12-27 23:26:27,030 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 4073 transitions. Word has length 44 [2019-12-27 23:26:27,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:27,030 INFO L462 AbstractCegarLoop]: Abstraction has 1660 states and 4073 transitions. [2019-12-27 23:26:27,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:27,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 4073 transitions. [2019-12-27 23:26:27,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:27,032 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:27,032 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:27,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:27,233 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:27,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:27,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1772033396, now seen corresponding path program 26 times [2019-12-27 23:26:27,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:27,234 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575247167] [2019-12-27 23:26:27,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:27,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575247167] [2019-12-27 23:26:27,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965863775] [2019-12-27 23:26:27,386 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:27,431 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:26:27,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:27,432 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:27,433 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:27,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:27,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:27,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:27,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:27,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:27,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [278701354] [2019-12-27 23:26:27,565 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:27,567 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:27,581 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 102 states and 158 transitions. [2019-12-27 23:26:27,581 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:27,583 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 23:26:27,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:27,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:27,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:27,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:27,584 INFO L87 Difference]: Start difference. First operand 1660 states and 4073 transitions. Second operand 11 states. [2019-12-27 23:26:27,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:27,969 INFO L93 Difference]: Finished difference Result 2347 states and 5499 transitions. [2019-12-27 23:26:27,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:26:27,969 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:27,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:27,972 INFO L225 Difference]: With dead ends: 2347 [2019-12-27 23:26:27,972 INFO L226 Difference]: Without dead ends: 2184 [2019-12-27 23:26:27,972 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:26:27,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2019-12-27 23:26:27,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1628. [2019-12-27 23:26:27,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1628 states. [2019-12-27 23:26:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 3993 transitions. [2019-12-27 23:26:27,992 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 3993 transitions. Word has length 44 [2019-12-27 23:26:27,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:27,992 INFO L462 AbstractCegarLoop]: Abstraction has 1628 states and 3993 transitions. [2019-12-27 23:26:27,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:27,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 3993 transitions. [2019-12-27 23:26:27,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:27,993 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:27,993 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:28,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:28,194 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:28,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:28,194 INFO L82 PathProgramCache]: Analyzing trace with hash -393873042, now seen corresponding path program 27 times [2019-12-27 23:26:28,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:28,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457560862] [2019-12-27 23:26:28,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:28,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457560862] [2019-12-27 23:26:28,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166239154] [2019-12-27 23:26:28,333 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:28,378 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:26:28,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:28,378 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:28,379 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:29,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:29,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:29,636 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:29,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:29,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:29,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1878405394] [2019-12-27 23:26:29,659 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:29,661 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:29,679 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 114 states and 182 transitions. [2019-12-27 23:26:29,679 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:29,680 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 11 times. [2019-12-27 23:26:29,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:29,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:29,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:29,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=237, Unknown=1, NotChecked=0, Total=306 [2019-12-27 23:26:29,681 INFO L87 Difference]: Start difference. First operand 1628 states and 3993 transitions. Second operand 11 states. [2019-12-27 23:26:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:30,290 INFO L93 Difference]: Finished difference Result 2527 states and 5916 transitions. [2019-12-27 23:26:30,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:26:30,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:30,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:30,293 INFO L225 Difference]: With dead ends: 2527 [2019-12-27 23:26:30,294 INFO L226 Difference]: Without dead ends: 2308 [2019-12-27 23:26:30,294 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=205, Invalid=606, Unknown=1, NotChecked=0, Total=812 [2019-12-27 23:26:30,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2019-12-27 23:26:30,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1644. [2019-12-27 23:26:30,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1644 states. [2019-12-27 23:26:30,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 4033 transitions. [2019-12-27 23:26:30,315 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 4033 transitions. Word has length 44 [2019-12-27 23:26:30,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:30,315 INFO L462 AbstractCegarLoop]: Abstraction has 1644 states and 4033 transitions. [2019-12-27 23:26:30,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:30,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 4033 transitions. [2019-12-27 23:26:30,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:30,316 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:30,317 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:30,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:30,517 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:30,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:30,518 INFO L82 PathProgramCache]: Analyzing trace with hash 59248068, now seen corresponding path program 28 times [2019-12-27 23:26:30,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:30,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100507299] [2019-12-27 23:26:30,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:30,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100507299] [2019-12-27 23:26:30,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299211208] [2019-12-27 23:26:30,640 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:30,687 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:26:30,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:30,688 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:30,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:31,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:31,045 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:31,047 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:31,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:31,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:31,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1680098863] [2019-12-27 23:26:31,053 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:31,056 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:31,073 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 114 states and 182 transitions. [2019-12-27 23:26:31,073 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:31,074 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 23:26:31,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:31,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:31,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:31,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:31,075 INFO L87 Difference]: Start difference. First operand 1644 states and 4033 transitions. Second operand 11 states. [2019-12-27 23:26:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:31,956 INFO L93 Difference]: Finished difference Result 2391 states and 5595 transitions. [2019-12-27 23:26:31,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:26:31,956 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:31,959 INFO L225 Difference]: With dead ends: 2391 [2019-12-27 23:26:31,959 INFO L226 Difference]: Without dead ends: 2228 [2019-12-27 23:26:31,959 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=205, Invalid=606, Unknown=1, NotChecked=0, Total=812 [2019-12-27 23:26:31,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2019-12-27 23:26:31,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 1660. [2019-12-27 23:26:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1660 states. [2019-12-27 23:26:31,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 4073 transitions. [2019-12-27 23:26:31,979 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 4073 transitions. Word has length 44 [2019-12-27 23:26:31,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:31,979 INFO L462 AbstractCegarLoop]: Abstraction has 1660 states and 4073 transitions. [2019-12-27 23:26:31,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:31,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 4073 transitions. [2019-12-27 23:26:31,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:31,980 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:31,981 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:32,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:32,181 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:32,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:32,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1173517862, now seen corresponding path program 29 times [2019-12-27 23:26:32,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:32,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364578408] [2019-12-27 23:26:32,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:32,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364578408] [2019-12-27 23:26:32,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822453421] [2019-12-27 23:26:32,337 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:32,387 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 23:26:32,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:32,388 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:32,389 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:32,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:32,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:32,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:32,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:32,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:32,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [873634819] [2019-12-27 23:26:32,517 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:32,519 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:32,532 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 90 states and 134 transitions. [2019-12-27 23:26:32,532 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:32,533 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:26:32,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:32,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:32,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:32,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:32,535 INFO L87 Difference]: Start difference. First operand 1660 states and 4073 transitions. Second operand 11 states. [2019-12-27 23:26:32,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:32,905 INFO L93 Difference]: Finished difference Result 2351 states and 5512 transitions. [2019-12-27 23:26:32,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:26:32,905 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:32,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:32,908 INFO L225 Difference]: With dead ends: 2351 [2019-12-27 23:26:32,908 INFO L226 Difference]: Without dead ends: 2216 [2019-12-27 23:26:32,908 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:26:32,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2019-12-27 23:26:32,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 1612. [2019-12-27 23:26:32,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1612 states. [2019-12-27 23:26:32,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 3953 transitions. [2019-12-27 23:26:32,927 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 3953 transitions. Word has length 44 [2019-12-27 23:26:32,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:32,927 INFO L462 AbstractCegarLoop]: Abstraction has 1612 states and 3953 transitions. [2019-12-27 23:26:32,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:32,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 3953 transitions. [2019-12-27 23:26:32,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:32,929 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:32,929 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:33,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:33,129 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:33,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:33,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1301891438, now seen corresponding path program 30 times [2019-12-27 23:26:33,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:33,131 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278362093] [2019-12-27 23:26:33,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:33,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278362093] [2019-12-27 23:26:33,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834053633] [2019-12-27 23:26:33,269 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:33,327 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 23:26:33,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:33,328 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:33,330 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:33,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:33,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:33,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:33,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:33,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:33,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [337269360] [2019-12-27 23:26:33,551 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:33,558 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:33,590 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 114 states and 182 transitions. [2019-12-27 23:26:33,591 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:33,592 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 11 times. [2019-12-27 23:26:33,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:33,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:33,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:33,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:33,593 INFO L87 Difference]: Start difference. First operand 1612 states and 3953 transitions. Second operand 11 states. [2019-12-27 23:26:34,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:34,135 INFO L93 Difference]: Finished difference Result 2551 states and 5952 transitions. [2019-12-27 23:26:34,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:26:34,135 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:34,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:34,138 INFO L225 Difference]: With dead ends: 2551 [2019-12-27 23:26:34,139 INFO L226 Difference]: Without dead ends: 2332 [2019-12-27 23:26:34,139 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:26:34,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2019-12-27 23:26:34,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1644. [2019-12-27 23:26:34,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1644 states. [2019-12-27 23:26:34,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 4033 transitions. [2019-12-27 23:26:34,171 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 4033 transitions. Word has length 44 [2019-12-27 23:26:34,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:34,171 INFO L462 AbstractCegarLoop]: Abstraction has 1644 states and 4033 transitions. [2019-12-27 23:26:34,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:34,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 4033 transitions. [2019-12-27 23:26:34,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:34,174 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:34,174 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:34,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:34,378 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:34,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:34,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1311722468, now seen corresponding path program 31 times [2019-12-27 23:26:34,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:34,380 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374444622] [2019-12-27 23:26:34,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:34,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374444622] [2019-12-27 23:26:34,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147638938] [2019-12-27 23:26:34,535 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:34,611 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:34,613 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:34,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:34,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:34,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:34,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:34,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1968874980] [2019-12-27 23:26:34,730 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:34,733 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:34,750 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 114 states and 182 transitions. [2019-12-27 23:26:34,750 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:34,751 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 11 times. [2019-12-27 23:26:34,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:34,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:34,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:34,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:34,752 INFO L87 Difference]: Start difference. First operand 1644 states and 4033 transitions. Second operand 11 states. [2019-12-27 23:26:35,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:35,148 INFO L93 Difference]: Finished difference Result 2387 states and 5575 transitions. [2019-12-27 23:26:35,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:26:35,148 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:35,151 INFO L225 Difference]: With dead ends: 2387 [2019-12-27 23:26:35,151 INFO L226 Difference]: Without dead ends: 2224 [2019-12-27 23:26:35,151 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:26:35,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2019-12-27 23:26:35,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 1660. [2019-12-27 23:26:35,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1660 states. [2019-12-27 23:26:35,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 4073 transitions. [2019-12-27 23:26:35,177 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 4073 transitions. Word has length 44 [2019-12-27 23:26:35,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:35,178 INFO L462 AbstractCegarLoop]: Abstraction has 1660 states and 4073 transitions. [2019-12-27 23:26:35,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:35,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 4073 transitions. [2019-12-27 23:26:35,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:35,180 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:35,180 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:35,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:35,384 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:35,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:35,384 INFO L82 PathProgramCache]: Analyzing trace with hash -494018348, now seen corresponding path program 32 times [2019-12-27 23:26:35,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:35,385 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826135864] [2019-12-27 23:26:35,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:35,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826135864] [2019-12-27 23:26:35,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383644088] [2019-12-27 23:26:35,531 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:35,578 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:26:35,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:35,579 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:35,580 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:35,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:35,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:35,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:35,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:35,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:35,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [852571658] [2019-12-27 23:26:35,710 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:35,713 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:35,729 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 102 states and 158 transitions. [2019-12-27 23:26:35,729 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:35,730 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 23:26:35,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:35,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:35,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:35,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:35,730 INFO L87 Difference]: Start difference. First operand 1660 states and 4073 transitions. Second operand 11 states. [2019-12-27 23:26:36,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:36,099 INFO L93 Difference]: Finished difference Result 2331 states and 5456 transitions. [2019-12-27 23:26:36,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:26:36,100 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:36,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:36,103 INFO L225 Difference]: With dead ends: 2331 [2019-12-27 23:26:36,103 INFO L226 Difference]: Without dead ends: 2196 [2019-12-27 23:26:36,103 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:26:36,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2019-12-27 23:26:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 1628. [2019-12-27 23:26:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1628 states. [2019-12-27 23:26:36,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 3993 transitions. [2019-12-27 23:26:36,124 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 3993 transitions. Word has length 44 [2019-12-27 23:26:36,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:36,124 INFO L462 AbstractCegarLoop]: Abstraction has 1628 states and 3993 transitions. [2019-12-27 23:26:36,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:36,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 3993 transitions. [2019-12-27 23:26:36,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:36,125 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:36,125 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:36,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:36,326 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:36,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:36,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1640294062, now seen corresponding path program 33 times [2019-12-27 23:26:36,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:36,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109093578] [2019-12-27 23:26:36,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:36,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109093578] [2019-12-27 23:26:36,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339916761] [2019-12-27 23:26:36,509 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:36,584 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:26:36,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:36,586 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:36,588 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:38,020 WARN L192 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-27 23:26:38,021 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:38,021 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:38,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:38,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:38,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:38,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1726389123] [2019-12-27 23:26:38,036 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:38,039 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:38,058 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 114 states and 182 transitions. [2019-12-27 23:26:38,058 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:38,059 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 11 times. [2019-12-27 23:26:38,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:38,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:38,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:38,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=237, Unknown=2, NotChecked=0, Total=306 [2019-12-27 23:26:38,060 INFO L87 Difference]: Start difference. First operand 1628 states and 3993 transitions. Second operand 11 states. [2019-12-27 23:26:38,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:38,889 INFO L93 Difference]: Finished difference Result 2427 states and 5689 transitions. [2019-12-27 23:26:38,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:26:38,890 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:38,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:38,892 INFO L225 Difference]: With dead ends: 2427 [2019-12-27 23:26:38,892 INFO L226 Difference]: Without dead ends: 2236 [2019-12-27 23:26:38,893 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=200, Invalid=610, Unknown=2, NotChecked=0, Total=812 [2019-12-27 23:26:38,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2019-12-27 23:26:38,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1644. [2019-12-27 23:26:38,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1644 states. [2019-12-27 23:26:38,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 4033 transitions. [2019-12-27 23:26:38,913 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 4033 transitions. Word has length 44 [2019-12-27 23:26:38,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:38,914 INFO L462 AbstractCegarLoop]: Abstraction has 1644 states and 4033 transitions. [2019-12-27 23:26:38,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:38,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 4033 transitions. [2019-12-27 23:26:38,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:38,915 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:38,915 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:39,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:39,116 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:39,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:39,117 INFO L82 PathProgramCache]: Analyzing trace with hash 2093415172, now seen corresponding path program 34 times [2019-12-27 23:26:39,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:39,118 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683617121] [2019-12-27 23:26:39,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:39,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683617121] [2019-12-27 23:26:39,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544441975] [2019-12-27 23:26:39,247 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:39,294 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:26:39,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:39,295 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:39,296 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:39,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:39,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:39,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:39,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:39,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:39,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1424160970] [2019-12-27 23:26:39,416 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:39,419 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:39,436 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 114 states and 182 transitions. [2019-12-27 23:26:39,436 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:39,437 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 23:26:39,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:39,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:39,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:39,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:39,438 INFO L87 Difference]: Start difference. First operand 1644 states and 4033 transitions. Second operand 11 states. [2019-12-27 23:26:39,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:39,818 INFO L93 Difference]: Finished difference Result 2263 states and 5316 transitions. [2019-12-27 23:26:39,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:26:39,818 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:39,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:39,820 INFO L225 Difference]: With dead ends: 2263 [2019-12-27 23:26:39,820 INFO L226 Difference]: Without dead ends: 2128 [2019-12-27 23:26:39,821 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:26:39,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2019-12-27 23:26:39,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 1660. [2019-12-27 23:26:39,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1660 states. [2019-12-27 23:26:39,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 4073 transitions. [2019-12-27 23:26:39,847 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 4073 transitions. Word has length 44 [2019-12-27 23:26:39,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:39,847 INFO L462 AbstractCegarLoop]: Abstraction has 1660 states and 4073 transitions. [2019-12-27 23:26:39,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:39,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 4073 transitions. [2019-12-27 23:26:39,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:39,849 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:39,849 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:40,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:40,053 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:40,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:40,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1950393536, now seen corresponding path program 9 times [2019-12-27 23:26:40,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:40,054 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341755848] [2019-12-27 23:26:40,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:40,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341755848] [2019-12-27 23:26:40,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034455014] [2019-12-27 23:26:40,267 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:40,333 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 23:26:40,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:40,334 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:40,336 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:40,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:40,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:40,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:40,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:40,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:40,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2084613045] [2019-12-27 23:26:40,487 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:40,491 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:40,507 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 78 states and 110 transitions. [2019-12-27 23:26:40,507 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:40,508 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:26:40,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:40,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:40,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:40,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:40,509 INFO L87 Difference]: Start difference. First operand 1660 states and 4073 transitions. Second operand 11 states. [2019-12-27 23:26:40,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:40,858 INFO L93 Difference]: Finished difference Result 2251 states and 5279 transitions. [2019-12-27 23:26:40,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:26:40,858 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:40,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:40,860 INFO L225 Difference]: With dead ends: 2251 [2019-12-27 23:26:40,861 INFO L226 Difference]: Without dead ends: 2084 [2019-12-27 23:26:40,861 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:26:40,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2019-12-27 23:26:40,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1612. [2019-12-27 23:26:40,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1612 states. [2019-12-27 23:26:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 3949 transitions. [2019-12-27 23:26:40,879 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 3949 transitions. Word has length 44 [2019-12-27 23:26:40,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:40,880 INFO L462 AbstractCegarLoop]: Abstraction has 1612 states and 3949 transitions. [2019-12-27 23:26:40,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:40,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 3949 transitions. [2019-12-27 23:26:40,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:40,881 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:40,881 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:41,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:41,082 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:41,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:41,083 INFO L82 PathProgramCache]: Analyzing trace with hash -811669720, now seen corresponding path program 7 times [2019-12-27 23:26:41,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:41,084 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839919003] [2019-12-27 23:26:41,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:41,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839919003] [2019-12-27 23:26:41,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363358146] [2019-12-27 23:26:41,226 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:41,273 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:41,275 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:41,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:41,400 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:41,402 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:41,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:41,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:41,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [733866450] [2019-12-27 23:26:41,407 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:41,410 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:41,435 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 165 states and 284 transitions. [2019-12-27 23:26:41,435 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:41,439 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 30 times. [2019-12-27 23:26:41,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:41,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:41,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:41,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:41,440 INFO L87 Difference]: Start difference. First operand 1612 states and 3949 transitions. Second operand 11 states. [2019-12-27 23:26:41,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:41,803 INFO L93 Difference]: Finished difference Result 2296 states and 5424 transitions. [2019-12-27 23:26:41,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:26:41,803 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:41,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:41,805 INFO L225 Difference]: With dead ends: 2296 [2019-12-27 23:26:41,805 INFO L226 Difference]: Without dead ends: 2021 [2019-12-27 23:26:41,806 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:26:41,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2019-12-27 23:26:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1661. [2019-12-27 23:26:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1661 states. [2019-12-27 23:26:41,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 4051 transitions. [2019-12-27 23:26:41,827 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 4051 transitions. Word has length 44 [2019-12-27 23:26:41,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:41,827 INFO L462 AbstractCegarLoop]: Abstraction has 1661 states and 4051 transitions. [2019-12-27 23:26:41,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 4051 transitions. [2019-12-27 23:26:41,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:41,828 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:41,829 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:42,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:42,029 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:42,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:42,030 INFO L82 PathProgramCache]: Analyzing trace with hash -801838690, now seen corresponding path program 8 times [2019-12-27 23:26:42,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:42,031 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708084263] [2019-12-27 23:26:42,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:42,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708084263] [2019-12-27 23:26:42,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164155732] [2019-12-27 23:26:42,164 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:42,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:26:42,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:42,211 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:42,212 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:43,647 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:43,647 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:43,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:43,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:43,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:43,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [322207619] [2019-12-27 23:26:43,659 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:43,661 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:43,684 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 162 states and 278 transitions. [2019-12-27 23:26:43,684 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:43,687 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 27 times. [2019-12-27 23:26:43,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:43,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:43,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:43,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:43,688 INFO L87 Difference]: Start difference. First operand 1661 states and 4051 transitions. Second operand 11 states. [2019-12-27 23:26:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:44,511 INFO L93 Difference]: Finished difference Result 2332 states and 5451 transitions. [2019-12-27 23:26:44,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:26:44,512 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:44,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:44,514 INFO L225 Difference]: With dead ends: 2332 [2019-12-27 23:26:44,514 INFO L226 Difference]: Without dead ends: 2113 [2019-12-27 23:26:44,514 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=179, Invalid=576, Unknown=1, NotChecked=0, Total=756 [2019-12-27 23:26:44,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2019-12-27 23:26:44,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1677. [2019-12-27 23:26:44,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1677 states. [2019-12-27 23:26:44,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 4091 transitions. [2019-12-27 23:26:44,530 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 4091 transitions. Word has length 44 [2019-12-27 23:26:44,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:44,530 INFO L462 AbstractCegarLoop]: Abstraction has 1677 states and 4091 transitions. [2019-12-27 23:26:44,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:44,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 4091 transitions. [2019-12-27 23:26:44,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:44,532 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:44,532 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:44,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:44,734 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:44,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:44,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1687387790, now seen corresponding path program 35 times [2019-12-27 23:26:44,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:44,736 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674677258] [2019-12-27 23:26:44,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:44,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674677258] [2019-12-27 23:26:44,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8635177] [2019-12-27 23:26:44,875 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:44,922 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:26:44,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:44,924 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:44,925 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:45,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:45,066 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:45,068 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:45,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:45,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:45,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [9934297] [2019-12-27 23:26:45,075 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:45,078 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:45,106 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 141 states and 236 transitions. [2019-12-27 23:26:45,106 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:45,109 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 24 times. [2019-12-27 23:26:45,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:45,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:45,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:45,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:45,110 INFO L87 Difference]: Start difference. First operand 1677 states and 4091 transitions. Second operand 11 states. [2019-12-27 23:26:45,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:45,580 INFO L93 Difference]: Finished difference Result 2364 states and 5524 transitions. [2019-12-27 23:26:45,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:26:45,581 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:45,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:45,585 INFO L225 Difference]: With dead ends: 2364 [2019-12-27 23:26:45,585 INFO L226 Difference]: Without dead ends: 2173 [2019-12-27 23:26:45,586 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:26:45,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2173 states. [2019-12-27 23:26:45,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2173 to 1661. [2019-12-27 23:26:45,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1661 states. [2019-12-27 23:26:45,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 4051 transitions. [2019-12-27 23:26:45,627 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 4051 transitions. Word has length 44 [2019-12-27 23:26:45,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:45,628 INFO L462 AbstractCegarLoop]: Abstraction has 1661 states and 4051 transitions. [2019-12-27 23:26:45,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:45,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 4051 transitions. [2019-12-27 23:26:45,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:45,631 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:45,631 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:45,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:45,836 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:45,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:45,837 INFO L82 PathProgramCache]: Analyzing trace with hash -478518648, now seen corresponding path program 36 times [2019-12-27 23:26:45,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:45,838 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971090467] [2019-12-27 23:26:45,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:46,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971090467] [2019-12-27 23:26:46,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477740493] [2019-12-27 23:26:46,033 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:46,115 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:26:46,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:46,116 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:46,117 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:47,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:47,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:47,521 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:47,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:47,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:47,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [83349993] [2019-12-27 23:26:47,529 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:47,531 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:47,553 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 150 states and 254 transitions. [2019-12-27 23:26:47,553 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:47,556 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 23 times. [2019-12-27 23:26:47,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:47,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:47,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:47,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=237, Unknown=3, NotChecked=0, Total=306 [2019-12-27 23:26:47,557 INFO L87 Difference]: Start difference. First operand 1661 states and 4051 transitions. Second operand 11 states. [2019-12-27 23:26:50,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:50,627 INFO L93 Difference]: Finished difference Result 2584 states and 6013 transitions. [2019-12-27 23:26:50,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:26:50,627 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:50,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:50,630 INFO L225 Difference]: With dead ends: 2584 [2019-12-27 23:26:50,630 INFO L226 Difference]: Without dead ends: 2337 [2019-12-27 23:26:50,630 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=204, Invalid=658, Unknown=8, NotChecked=0, Total=870 [2019-12-27 23:26:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2019-12-27 23:26:50,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 1677. [2019-12-27 23:26:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1677 states. [2019-12-27 23:26:50,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 4091 transitions. [2019-12-27 23:26:50,649 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 4091 transitions. Word has length 44 [2019-12-27 23:26:50,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:50,649 INFO L462 AbstractCegarLoop]: Abstraction has 1677 states and 4091 transitions. [2019-12-27 23:26:50,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:50,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 4091 transitions. [2019-12-27 23:26:50,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:50,650 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:50,651 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:50,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:50,851 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:50,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:50,852 INFO L82 PathProgramCache]: Analyzing trace with hash -25397538, now seen corresponding path program 37 times [2019-12-27 23:26:50,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:50,853 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509847238] [2019-12-27 23:26:50,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:50,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509847238] [2019-12-27 23:26:50,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115400828] [2019-12-27 23:26:50,987 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:51,037 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:51,039 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:52,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:52,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:52,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:52,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:52,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:52,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1550352242] [2019-12-27 23:26:52,529 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:52,531 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:52,552 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 150 states and 254 transitions. [2019-12-27 23:26:52,553 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:52,555 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 24 times. [2019-12-27 23:26:52,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:52,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:52,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:52,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=238, Unknown=3, NotChecked=0, Total=306 [2019-12-27 23:26:52,556 INFO L87 Difference]: Start difference. First operand 1677 states and 4091 transitions. Second operand 11 states. [2019-12-27 23:26:53,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:53,851 INFO L93 Difference]: Finished difference Result 2448 states and 5700 transitions. [2019-12-27 23:26:53,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:26:53,852 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:53,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:53,855 INFO L225 Difference]: With dead ends: 2448 [2019-12-27 23:26:53,855 INFO L226 Difference]: Without dead ends: 2257 [2019-12-27 23:26:53,856 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=195, Invalid=612, Unknown=5, NotChecked=0, Total=812 [2019-12-27 23:26:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2019-12-27 23:26:53,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1693. [2019-12-27 23:26:53,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1693 states. [2019-12-27 23:26:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 4131 transitions. [2019-12-27 23:26:53,878 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 4131 transitions. Word has length 44 [2019-12-27 23:26:53,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:53,878 INFO L462 AbstractCegarLoop]: Abstraction has 1693 states and 4131 transitions. [2019-12-27 23:26:53,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 4131 transitions. [2019-12-27 23:26:53,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:53,879 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:53,880 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:54,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:54,080 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:54,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:54,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1258163468, now seen corresponding path program 38 times [2019-12-27 23:26:54,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:54,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837127956] [2019-12-27 23:26:54,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:54,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837127956] [2019-12-27 23:26:54,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163454325] [2019-12-27 23:26:54,232 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:54,280 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:26:54,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:54,281 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:54,282 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:54,440 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:54,441 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:54,443 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:54,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:54,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:54,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [716448911] [2019-12-27 23:26:54,450 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:54,452 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:54,467 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 117 states and 188 transitions. [2019-12-27 23:26:54,467 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:54,470 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 18 times. [2019-12-27 23:26:54,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:54,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:54,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:54,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:54,471 INFO L87 Difference]: Start difference. First operand 1693 states and 4131 transitions. Second operand 11 states. [2019-12-27 23:26:54,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:26:54,840 INFO L93 Difference]: Finished difference Result 2452 states and 5709 transitions. [2019-12-27 23:26:54,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:26:54,841 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:26:54,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:26:54,843 INFO L225 Difference]: With dead ends: 2452 [2019-12-27 23:26:54,843 INFO L226 Difference]: Without dead ends: 2289 [2019-12-27 23:26:54,844 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:26:54,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2019-12-27 23:26:54,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 1661. [2019-12-27 23:26:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1661 states. [2019-12-27 23:26:54,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 4051 transitions. [2019-12-27 23:26:54,862 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 4051 transitions. Word has length 44 [2019-12-27 23:26:54,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:26:54,862 INFO L462 AbstractCegarLoop]: Abstraction has 1661 states and 4051 transitions. [2019-12-27 23:26:54,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:26:54,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 4051 transitions. [2019-12-27 23:26:54,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:26:54,863 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:26:54,864 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:26:55,065 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:26:55,065 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:26:55,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:26:55,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1217245832, now seen corresponding path program 39 times [2019-12-27 23:26:55,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:26:55,067 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971114783] [2019-12-27 23:26:55,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:26:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:26:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:55,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971114783] [2019-12-27 23:26:55,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381576875] [2019-12-27 23:26:55,191 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:26:55,240 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:26:55,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:26:55,241 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:26:55,242 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:26:57,523 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:57,523 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:57,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:26:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:26:57,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:26:57,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:26:57,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1100579851] [2019-12-27 23:26:57,536 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:26:57,539 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:26:57,569 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 138 states and 230 transitions. [2019-12-27 23:26:57,569 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:26:57,572 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 20 times. [2019-12-27 23:26:57,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:26:57,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:26:57,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:26:57,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:26:57,573 INFO L87 Difference]: Start difference. First operand 1661 states and 4051 transitions. Second operand 11 states. [2019-12-27 23:27:02,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:02,155 INFO L93 Difference]: Finished difference Result 2612 states and 6069 transitions. [2019-12-27 23:27:02,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:27:02,155 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:27:02,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:02,158 INFO L225 Difference]: With dead ends: 2612 [2019-12-27 23:27:02,158 INFO L226 Difference]: Without dead ends: 2365 [2019-12-27 23:27:02,158 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=196, Invalid=672, Unknown=2, NotChecked=0, Total=870 [2019-12-27 23:27:02,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2019-12-27 23:27:02,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 1693. [2019-12-27 23:27:02,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1693 states. [2019-12-27 23:27:02,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 4131 transitions. [2019-12-27 23:27:02,177 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 4131 transitions. Word has length 44 [2019-12-27 23:27:02,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:02,177 INFO L462 AbstractCegarLoop]: Abstraction has 1693 states and 4131 transitions. [2019-12-27 23:27:02,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:27:02,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 4131 transitions. [2019-12-27 23:27:02,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:27:02,179 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:02,179 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:02,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:02,380 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:02,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:02,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1227076862, now seen corresponding path program 40 times [2019-12-27 23:27:02,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:02,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022210312] [2019-12-27 23:27:02,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:02,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:02,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022210312] [2019-12-27 23:27:02,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575120433] [2019-12-27 23:27:02,514 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:02,561 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:27:02,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:02,562 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:27:02,562 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:02,780 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:02,781 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:02,784 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:02,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:02,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:27:02,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1257629643] [2019-12-27 23:27:02,791 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:02,794 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:02,857 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 138 states and 230 transitions. [2019-12-27 23:27:02,857 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:02,859 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 20 times. [2019-12-27 23:27:02,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:27:02,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:02,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:27:02,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:27:02,860 INFO L87 Difference]: Start difference. First operand 1693 states and 4131 transitions. Second operand 11 states. [2019-12-27 23:27:03,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:03,316 INFO L93 Difference]: Finished difference Result 2404 states and 5600 transitions. [2019-12-27 23:27:03,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:27:03,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:27:03,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:03,319 INFO L225 Difference]: With dead ends: 2404 [2019-12-27 23:27:03,319 INFO L226 Difference]: Without dead ends: 2213 [2019-12-27 23:27:03,319 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:27:03,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2019-12-27 23:27:03,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 1709. [2019-12-27 23:27:03,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1709 states. [2019-12-27 23:27:03,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 4171 transitions. [2019-12-27 23:27:03,341 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 4171 transitions. Word has length 44 [2019-12-27 23:27:03,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:03,342 INFO L462 AbstractCegarLoop]: Abstraction has 1709 states and 4171 transitions. [2019-12-27 23:27:03,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:27:03,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 4171 transitions. [2019-12-27 23:27:03,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:27:03,343 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:03,343 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:03,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:03,544 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:03,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:03,545 INFO L82 PathProgramCache]: Analyzing trace with hash -578663954, now seen corresponding path program 41 times [2019-12-27 23:27:03,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:03,546 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590258595] [2019-12-27 23:27:03,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:03,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590258595] [2019-12-27 23:27:03,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984442301] [2019-12-27 23:27:03,677 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:03,724 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:27:03,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:03,725 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:27:03,726 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:03,954 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:03,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:03,957 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:03,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:03,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:27:03,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [310784670] [2019-12-27 23:27:03,966 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:03,969 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:03,991 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 126 states and 206 transitions. [2019-12-27 23:27:03,991 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:03,994 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 17 times. [2019-12-27 23:27:03,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:27:03,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:03,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:27:03,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:27:03,995 INFO L87 Difference]: Start difference. First operand 1709 states and 4171 transitions. Second operand 11 states. [2019-12-27 23:27:04,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:04,443 INFO L93 Difference]: Finished difference Result 2420 states and 5633 transitions. [2019-12-27 23:27:04,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:27:04,444 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:27:04,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:04,446 INFO L225 Difference]: With dead ends: 2420 [2019-12-27 23:27:04,446 INFO L226 Difference]: Without dead ends: 2257 [2019-12-27 23:27:04,447 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:27:04,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2019-12-27 23:27:04,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1677. [2019-12-27 23:27:04,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1677 states. [2019-12-27 23:27:04,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 4091 transitions. [2019-12-27 23:27:04,466 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 4091 transitions. Word has length 44 [2019-12-27 23:27:04,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:04,467 INFO L462 AbstractCegarLoop]: Abstraction has 1677 states and 4091 transitions. [2019-12-27 23:27:04,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:27:04,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 4091 transitions. [2019-12-27 23:27:04,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:27:04,468 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:04,468 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:04,668 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:04,669 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:04,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:04,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1555648456, now seen corresponding path program 42 times [2019-12-27 23:27:04,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:04,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009851037] [2019-12-27 23:27:04,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:04,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009851037] [2019-12-27 23:27:04,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604258973] [2019-12-27 23:27:04,798 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:04,844 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 23:27:04,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:04,845 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:27:04,846 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:05,040 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:05,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:05,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:05,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:05,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:27:05,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2072681468] [2019-12-27 23:27:05,058 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:05,061 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:05,083 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 138 states and 230 transitions. [2019-12-27 23:27:05,083 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:05,085 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 20 times. [2019-12-27 23:27:05,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:27:05,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:05,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:27:05,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:27:05,086 INFO L87 Difference]: Start difference. First operand 1677 states and 4091 transitions. Second operand 11 states. [2019-12-27 23:27:05,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:05,621 INFO L93 Difference]: Finished difference Result 2600 states and 6046 transitions. [2019-12-27 23:27:05,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 23:27:05,622 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:27:05,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:05,625 INFO L225 Difference]: With dead ends: 2600 [2019-12-27 23:27:05,625 INFO L226 Difference]: Without dead ends: 2381 [2019-12-27 23:27:05,625 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2019-12-27 23:27:05,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2019-12-27 23:27:05,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 1693. [2019-12-27 23:27:05,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1693 states. [2019-12-27 23:27:05,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 4131 transitions. [2019-12-27 23:27:05,667 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 4131 transitions. Word has length 44 [2019-12-27 23:27:05,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:05,667 INFO L462 AbstractCegarLoop]: Abstraction has 1693 states and 4131 transitions. [2019-12-27 23:27:05,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:27:05,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 4131 transitions. [2019-12-27 23:27:05,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:27:05,669 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:05,669 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:05,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:05,869 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:05,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:05,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2008769566, now seen corresponding path program 43 times [2019-12-27 23:27:05,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:05,871 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943613555] [2019-12-27 23:27:05,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:06,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943613555] [2019-12-27 23:27:06,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855420832] [2019-12-27 23:27:06,058 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:06,129 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:27:06,130 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:06,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:06,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:06,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:06,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:06,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:27:06,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1432387235] [2019-12-27 23:27:06,419 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:06,424 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:06,465 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 138 states and 230 transitions. [2019-12-27 23:27:06,465 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:06,469 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 21 times. [2019-12-27 23:27:06,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:27:06,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:06,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:27:06,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:27:06,470 INFO L87 Difference]: Start difference. First operand 1693 states and 4131 transitions. Second operand 11 states. [2019-12-27 23:27:06,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:06,872 INFO L93 Difference]: Finished difference Result 2308 states and 5401 transitions. [2019-12-27 23:27:06,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:27:06,872 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:27:06,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:06,875 INFO L225 Difference]: With dead ends: 2308 [2019-12-27 23:27:06,875 INFO L226 Difference]: Without dead ends: 2145 [2019-12-27 23:27:06,875 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:27:06,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2019-12-27 23:27:06,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1709. [2019-12-27 23:27:06,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1709 states. [2019-12-27 23:27:06,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 4171 transitions. [2019-12-27 23:27:06,893 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 4171 transitions. Word has length 44 [2019-12-27 23:27:06,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:06,893 INFO L462 AbstractCegarLoop]: Abstraction has 1709 states and 4171 transitions. [2019-12-27 23:27:06,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:27:06,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 4171 transitions. [2019-12-27 23:27:06,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:27:06,894 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:06,895 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:07,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:07,096 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:07,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:07,097 INFO L82 PathProgramCache]: Analyzing trace with hash -2035039142, now seen corresponding path program 44 times [2019-12-27 23:27:07,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:07,098 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340395946] [2019-12-27 23:27:07,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:07,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340395946] [2019-12-27 23:27:07,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200139818] [2019-12-27 23:27:07,253 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:07,294 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:27:07,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:07,295 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:27:07,296 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:07,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:07,422 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:07,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:07,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:07,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:27:07,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1405740695] [2019-12-27 23:27:07,432 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:07,434 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:07,447 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 93 states and 140 transitions. [2019-12-27 23:27:07,447 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:07,449 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 23:27:07,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:27:07,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:07,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:27:07,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:27:07,450 INFO L87 Difference]: Start difference. First operand 1709 states and 4171 transitions. Second operand 11 states. [2019-12-27 23:27:07,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:07,819 INFO L93 Difference]: Finished difference Result 2312 states and 5410 transitions. [2019-12-27 23:27:07,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:27:07,820 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:27:07,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:07,822 INFO L225 Difference]: With dead ends: 2312 [2019-12-27 23:27:07,822 INFO L226 Difference]: Without dead ends: 2177 [2019-12-27 23:27:07,823 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:27:07,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2019-12-27 23:27:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 1661. [2019-12-27 23:27:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1661 states. [2019-12-27 23:27:07,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 4051 transitions. [2019-12-27 23:27:07,841 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 4051 transitions. Word has length 44 [2019-12-27 23:27:07,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:07,841 INFO L462 AbstractCegarLoop]: Abstraction has 1661 states and 4051 transitions. [2019-12-27 23:27:07,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:27:07,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 4051 transitions. [2019-12-27 23:27:07,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:27:07,843 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:07,843 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:08,044 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:08,045 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:08,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:08,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1400439432, now seen corresponding path program 45 times [2019-12-27 23:27:08,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:08,046 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563682940] [2019-12-27 23:27:08,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:08,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563682940] [2019-12-27 23:27:08,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405834113] [2019-12-27 23:27:08,185 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:08,233 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:27:08,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:08,234 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:27:08,235 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:08,354 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:08,355 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:08,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:08,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:08,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:27:08,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1574146809] [2019-12-27 23:27:08,363 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:08,365 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:08,386 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 126 states and 206 transitions. [2019-12-27 23:27:08,386 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:08,388 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 17 times. [2019-12-27 23:27:08,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:27:08,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:08,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:27:08,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:27:08,388 INFO L87 Difference]: Start difference. First operand 1661 states and 4051 transitions. Second operand 11 states. [2019-12-27 23:27:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:08,861 INFO L93 Difference]: Finished difference Result 2752 states and 6365 transitions. [2019-12-27 23:27:08,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 23:27:08,862 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:27:08,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:08,864 INFO L225 Difference]: With dead ends: 2752 [2019-12-27 23:27:08,864 INFO L226 Difference]: Without dead ends: 2505 [2019-12-27 23:27:08,865 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2019-12-27 23:27:08,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2019-12-27 23:27:08,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 1709. [2019-12-27 23:27:08,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1709 states. [2019-12-27 23:27:08,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 4171 transitions. [2019-12-27 23:27:08,885 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 4171 transitions. Word has length 44 [2019-12-27 23:27:08,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:08,886 INFO L462 AbstractCegarLoop]: Abstraction has 1709 states and 4171 transitions. [2019-12-27 23:27:08,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:27:08,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 4171 transitions. [2019-12-27 23:27:08,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:27:08,887 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:08,887 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:09,087 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:09,088 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:09,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1410270462, now seen corresponding path program 46 times [2019-12-27 23:27:09,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:09,089 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041209544] [2019-12-27 23:27:09,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:09,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041209544] [2019-12-27 23:27:09,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305703585] [2019-12-27 23:27:09,215 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:09,260 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:27:09,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:09,261 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:27:09,262 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:10,051 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:10,051 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:10,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:10,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:10,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:27:10,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1924502383] [2019-12-27 23:27:10,060 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:10,064 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:10,084 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 126 states and 206 transitions. [2019-12-27 23:27:10,085 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:10,087 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 17 times. [2019-12-27 23:27:10,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:27:10,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:10,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:27:10,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:27:10,088 INFO L87 Difference]: Start difference. First operand 1709 states and 4171 transitions. Second operand 11 states. [2019-12-27 23:27:12,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:12,098 INFO L93 Difference]: Finished difference Result 2600 states and 6008 transitions. [2019-12-27 23:27:12,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 23:27:12,098 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:27:12,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:12,101 INFO L225 Difference]: With dead ends: 2600 [2019-12-27 23:27:12,101 INFO L226 Difference]: Without dead ends: 2409 [2019-12-27 23:27:12,101 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=227, Invalid=701, Unknown=2, NotChecked=0, Total=930 [2019-12-27 23:27:12,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2019-12-27 23:27:12,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 1725. [2019-12-27 23:27:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1725 states. [2019-12-27 23:27:12,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 4211 transitions. [2019-12-27 23:27:12,120 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 4211 transitions. Word has length 44 [2019-12-27 23:27:12,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:12,120 INFO L462 AbstractCegarLoop]: Abstraction has 1725 states and 4211 transitions. [2019-12-27 23:27:12,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:27:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 4211 transitions. [2019-12-27 23:27:12,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:27:12,122 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:12,122 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:12,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:12,323 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:12,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:12,323 INFO L82 PathProgramCache]: Analyzing trace with hash -395470354, now seen corresponding path program 47 times [2019-12-27 23:27:12,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:12,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981358072] [2019-12-27 23:27:12,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:12,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981358072] [2019-12-27 23:27:12,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55696902] [2019-12-27 23:27:12,456 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:12,500 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:27:12,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:12,501 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:27:12,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:12,634 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:12,634 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:12,636 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:12,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:12,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:27:12,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [471701248] [2019-12-27 23:27:12,642 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:12,644 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:12,660 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 114 states and 182 transitions. [2019-12-27 23:27:12,661 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:12,662 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 14 times. [2019-12-27 23:27:12,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:27:12,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:12,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:27:12,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:27:12,663 INFO L87 Difference]: Start difference. First operand 1725 states and 4211 transitions. Second operand 11 states. [2019-12-27 23:27:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:13,113 INFO L93 Difference]: Finished difference Result 2560 states and 5925 transitions. [2019-12-27 23:27:13,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 23:27:13,113 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:27:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:13,116 INFO L225 Difference]: With dead ends: 2560 [2019-12-27 23:27:13,116 INFO L226 Difference]: Without dead ends: 2397 [2019-12-27 23:27:13,116 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=706, Unknown=0, NotChecked=0, Total=930 [2019-12-27 23:27:13,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2019-12-27 23:27:13,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 1693. [2019-12-27 23:27:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1693 states. [2019-12-27 23:27:13,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 4131 transitions. [2019-12-27 23:27:13,135 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 4131 transitions. Word has length 44 [2019-12-27 23:27:13,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:13,135 INFO L462 AbstractCegarLoop]: Abstraction has 1693 states and 4131 transitions. [2019-12-27 23:27:13,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:27:13,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 4131 transitions. [2019-12-27 23:27:13,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:27:13,137 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:13,137 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:13,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:13,338 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:13,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:13,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1733590504, now seen corresponding path program 48 times [2019-12-27 23:27:13,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:13,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005949600] [2019-12-27 23:27:13,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:13,507 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005949600] [2019-12-27 23:27:13,507 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519424241] [2019-12-27 23:27:13,507 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:13,556 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 23:27:13,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:13,557 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:27:13,558 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:13,664 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:13,665 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:13,665 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:13,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:13,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:27:13,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1783526102] [2019-12-27 23:27:13,670 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:13,672 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:13,690 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 126 states and 206 transitions. [2019-12-27 23:27:13,690 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:13,692 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 16 times. [2019-12-27 23:27:13,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:27:13,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:13,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:27:13,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:27:13,693 INFO L87 Difference]: Start difference. First operand 1693 states and 4131 transitions. Second operand 11 states. [2019-12-27 23:27:14,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:14,122 INFO L93 Difference]: Finished difference Result 2600 states and 6042 transitions. [2019-12-27 23:27:14,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:27:14,123 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:27:14,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:14,125 INFO L225 Difference]: With dead ends: 2600 [2019-12-27 23:27:14,125 INFO L226 Difference]: Without dead ends: 2381 [2019-12-27 23:27:14,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:27:14,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2019-12-27 23:27:14,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 1709. [2019-12-27 23:27:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1709 states. [2019-12-27 23:27:14,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 4171 transitions. [2019-12-27 23:27:14,145 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 4171 transitions. Word has length 44 [2019-12-27 23:27:14,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:14,145 INFO L462 AbstractCegarLoop]: Abstraction has 1709 states and 4171 transitions. [2019-12-27 23:27:14,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:27:14,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 4171 transitions. [2019-12-27 23:27:14,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:27:14,147 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:14,147 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:14,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:14,348 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:14,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:14,348 INFO L82 PathProgramCache]: Analyzing trace with hash -2108255682, now seen corresponding path program 49 times [2019-12-27 23:27:14,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:14,349 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981999264] [2019-12-27 23:27:14,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:14,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981999264] [2019-12-27 23:27:14,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850360657] [2019-12-27 23:27:14,473 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:14,516 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:27:14,517 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:14,628 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:14,629 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:14,631 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:14,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:14,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:27:14,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [747579490] [2019-12-27 23:27:14,637 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:14,639 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:14,658 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 126 states and 206 transitions. [2019-12-27 23:27:14,658 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:14,660 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 17 times. [2019-12-27 23:27:14,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:27:14,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:14,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:27:14,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:27:14,660 INFO L87 Difference]: Start difference. First operand 1709 states and 4171 transitions. Second operand 11 states. [2019-12-27 23:27:15,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:15,083 INFO L93 Difference]: Finished difference Result 2448 states and 5685 transitions. [2019-12-27 23:27:15,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:27:15,083 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:27:15,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:15,086 INFO L225 Difference]: With dead ends: 2448 [2019-12-27 23:27:15,086 INFO L226 Difference]: Without dead ends: 2285 [2019-12-27 23:27:15,086 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:27:15,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2019-12-27 23:27:15,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1725. [2019-12-27 23:27:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1725 states. [2019-12-27 23:27:15,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 4211 transitions. [2019-12-27 23:27:15,108 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 4211 transitions. Word has length 44 [2019-12-27 23:27:15,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:15,109 INFO L462 AbstractCegarLoop]: Abstraction has 1725 states and 4211 transitions. [2019-12-27 23:27:15,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:27:15,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 4211 transitions. [2019-12-27 23:27:15,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:27:15,110 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:15,110 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:15,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:15,312 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:15,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:15,313 INFO L82 PathProgramCache]: Analyzing trace with hash 953945684, now seen corresponding path program 50 times [2019-12-27 23:27:15,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:15,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312350490] [2019-12-27 23:27:15,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:15,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312350490] [2019-12-27 23:27:15,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638949664] [2019-12-27 23:27:15,446 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:15,490 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:27:15,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:15,492 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:27:15,492 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:15,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:15,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:15,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:15,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:15,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:27:15,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1043518934] [2019-12-27 23:27:15,618 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:15,620 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:15,634 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 102 states and 158 transitions. [2019-12-27 23:27:15,634 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:15,635 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 11 times. [2019-12-27 23:27:15,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:27:15,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:15,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:27:15,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:27:15,636 INFO L87 Difference]: Start difference. First operand 1725 states and 4211 transitions. Second operand 11 states. [2019-12-27 23:27:16,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:16,032 INFO L93 Difference]: Finished difference Result 2436 states and 5662 transitions. [2019-12-27 23:27:16,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:27:16,032 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:27:16,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:16,035 INFO L225 Difference]: With dead ends: 2436 [2019-12-27 23:27:16,035 INFO L226 Difference]: Without dead ends: 2301 [2019-12-27 23:27:16,035 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:27:16,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2019-12-27 23:27:16,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1677. [2019-12-27 23:27:16,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1677 states. [2019-12-27 23:27:16,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 4091 transitions. [2019-12-27 23:27:16,053 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 4091 transitions. Word has length 44 [2019-12-27 23:27:16,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:16,053 INFO L462 AbstractCegarLoop]: Abstraction has 1677 states and 4091 transitions. [2019-12-27 23:27:16,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:27:16,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 4091 transitions. [2019-12-27 23:27:16,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:27:16,054 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:16,055 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:16,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:16,255 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:16,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:16,256 INFO L82 PathProgramCache]: Analyzing trace with hash 34865096, now seen corresponding path program 51 times [2019-12-27 23:27:16,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:16,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161113557] [2019-12-27 23:27:16,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:16,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161113557] [2019-12-27 23:27:16,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050947940] [2019-12-27 23:27:16,404 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:16,452 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:27:16,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:16,453 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:27:16,454 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:17,091 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:17,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:17,093 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:17,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:17,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:27:17,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1094204663] [2019-12-27 23:27:17,101 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:17,103 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:17,124 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 126 states and 206 transitions. [2019-12-27 23:27:17,124 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:17,126 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 17 times. [2019-12-27 23:27:17,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:27:17,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:17,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:27:17,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:27:17,126 INFO L87 Difference]: Start difference. First operand 1677 states and 4091 transitions. Second operand 11 states. [2019-12-27 23:27:17,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:17,578 INFO L93 Difference]: Finished difference Result 2600 states and 6042 transitions. [2019-12-27 23:27:17,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:27:17,578 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:27:17,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:17,581 INFO L225 Difference]: With dead ends: 2600 [2019-12-27 23:27:17,581 INFO L226 Difference]: Without dead ends: 2381 [2019-12-27 23:27:17,582 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:27:17,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2019-12-27 23:27:17,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 1709. [2019-12-27 23:27:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1709 states. [2019-12-27 23:27:17,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 4171 transitions. [2019-12-27 23:27:17,603 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 4171 transitions. Word has length 44 [2019-12-27 23:27:17,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:17,603 INFO L462 AbstractCegarLoop]: Abstraction has 1709 states and 4171 transitions. [2019-12-27 23:27:17,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:27:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 4171 transitions. [2019-12-27 23:27:17,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:27:17,604 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:17,605 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:17,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:17,805 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:17,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:17,806 INFO L82 PathProgramCache]: Analyzing trace with hash 44696126, now seen corresponding path program 52 times [2019-12-27 23:27:17,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:17,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390082352] [2019-12-27 23:27:17,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:18,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390082352] [2019-12-27 23:27:18,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307028001] [2019-12-27 23:27:18,001 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:18,070 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:27:18,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:18,072 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:27:18,073 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:19,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:19,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:19,023 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:19,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:19,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:27:19,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1839612807] [2019-12-27 23:27:19,029 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:19,032 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:19,050 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 126 states and 206 transitions. [2019-12-27 23:27:19,050 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:19,052 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 17 times. [2019-12-27 23:27:19,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:27:19,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:19,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:27:19,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:27:19,052 INFO L87 Difference]: Start difference. First operand 1709 states and 4171 transitions. Second operand 11 states. [2019-12-27 23:27:19,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:19,656 INFO L93 Difference]: Finished difference Result 2404 states and 5585 transitions. [2019-12-27 23:27:19,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:27:19,657 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:27:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:19,659 INFO L225 Difference]: With dead ends: 2404 [2019-12-27 23:27:19,659 INFO L226 Difference]: Without dead ends: 2241 [2019-12-27 23:27:19,660 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:27:19,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2019-12-27 23:27:19,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1725. [2019-12-27 23:27:19,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1725 states. [2019-12-27 23:27:19,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 4211 transitions. [2019-12-27 23:27:19,681 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 4211 transitions. Word has length 44 [2019-12-27 23:27:19,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:19,681 INFO L462 AbstractCegarLoop]: Abstraction has 1725 states and 4211 transitions. [2019-12-27 23:27:19,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:27:19,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 4211 transitions. [2019-12-27 23:27:19,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:27:19,682 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:19,682 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:19,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:19,883 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:19,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:19,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1761044690, now seen corresponding path program 53 times [2019-12-27 23:27:19,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:19,885 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119498649] [2019-12-27 23:27:19,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:20,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119498649] [2019-12-27 23:27:20,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957109710] [2019-12-27 23:27:20,074 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:20,143 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:27:20,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:20,144 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:27:20,146 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:20,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:20,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:20,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:20,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:20,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:27:20,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2147211525] [2019-12-27 23:27:20,428 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:20,430 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:20,448 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 114 states and 182 transitions. [2019-12-27 23:27:20,448 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:20,449 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 14 times. [2019-12-27 23:27:20,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:27:20,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:20,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:27:20,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:27:20,450 INFO L87 Difference]: Start difference. First operand 1725 states and 4211 transitions. Second operand 11 states. [2019-12-27 23:27:20,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:20,919 INFO L93 Difference]: Finished difference Result 2392 states and 5562 transitions. [2019-12-27 23:27:20,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:27:20,920 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:27:20,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:20,922 INFO L225 Difference]: With dead ends: 2392 [2019-12-27 23:27:20,922 INFO L226 Difference]: Without dead ends: 2257 [2019-12-27 23:27:20,922 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:27:20,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2019-12-27 23:27:20,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1693. [2019-12-27 23:27:20,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1693 states. [2019-12-27 23:27:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 4131 transitions. [2019-12-27 23:27:20,942 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 4131 transitions. Word has length 44 [2019-12-27 23:27:20,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:20,942 INFO L462 AbstractCegarLoop]: Abstraction has 1693 states and 4131 transitions. [2019-12-27 23:27:20,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:27:20,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 4131 transitions. [2019-12-27 23:27:20,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:27:20,944 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:20,944 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:21,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:21,147 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:21,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:21,148 INFO L82 PathProgramCache]: Analyzing trace with hash 373267720, now seen corresponding path program 54 times [2019-12-27 23:27:21,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:21,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719114947] [2019-12-27 23:27:21,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:21,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719114947] [2019-12-27 23:27:21,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923805237] [2019-12-27 23:27:21,267 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:21,315 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:27:21,315 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:21,316 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:27:21,317 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:22,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:22,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:22,016 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:22,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:22,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:27:22,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1344583127] [2019-12-27 23:27:22,029 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:22,031 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:22,050 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 126 states and 206 transitions. [2019-12-27 23:27:22,050 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:22,052 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 17 times. [2019-12-27 23:27:22,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:27:22,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:22,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:27:22,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:27:22,053 INFO L87 Difference]: Start difference. First operand 1693 states and 4131 transitions. Second operand 11 states. [2019-12-27 23:27:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:23,683 INFO L93 Difference]: Finished difference Result 2420 states and 5659 transitions. [2019-12-27 23:27:23,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:27:23,684 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:27:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:23,686 INFO L225 Difference]: With dead ends: 2420 [2019-12-27 23:27:23,686 INFO L226 Difference]: Without dead ends: 2229 [2019-12-27 23:27:23,686 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=204, Invalid=664, Unknown=2, NotChecked=0, Total=870 [2019-12-27 23:27:23,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2019-12-27 23:27:23,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1709. [2019-12-27 23:27:23,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1709 states. [2019-12-27 23:27:23,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 4171 transitions. [2019-12-27 23:27:23,708 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 4171 transitions. Word has length 44 [2019-12-27 23:27:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:23,709 INFO L462 AbstractCegarLoop]: Abstraction has 1709 states and 4171 transitions. [2019-12-27 23:27:23,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:27:23,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 4171 transitions. [2019-12-27 23:27:23,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:27:23,710 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:23,710 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:23,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:23,911 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:23,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:23,911 INFO L82 PathProgramCache]: Analyzing trace with hash 826388830, now seen corresponding path program 55 times [2019-12-27 23:27:23,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:23,912 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187360112] [2019-12-27 23:27:23,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:24,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187360112] [2019-12-27 23:27:24,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818278927] [2019-12-27 23:27:24,028 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:24,073 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:27:24,074 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:24,207 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:24,207 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:24,209 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:24,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:24,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:27:24,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1944381749] [2019-12-27 23:27:24,215 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:24,217 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:24,236 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 126 states and 206 transitions. [2019-12-27 23:27:24,236 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:24,238 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 18 times. [2019-12-27 23:27:24,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:27:24,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:24,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:27:24,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:27:24,238 INFO L87 Difference]: Start difference. First operand 1709 states and 4171 transitions. Second operand 11 states. [2019-12-27 23:27:24,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:24,648 INFO L93 Difference]: Finished difference Result 2228 states and 5230 transitions. [2019-12-27 23:27:24,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:27:24,649 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:27:24,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:24,651 INFO L225 Difference]: With dead ends: 2228 [2019-12-27 23:27:24,652 INFO L226 Difference]: Without dead ends: 2093 [2019-12-27 23:27:24,652 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:27:24,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2019-12-27 23:27:24,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1725. [2019-12-27 23:27:24,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1725 states. [2019-12-27 23:27:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 4211 transitions. [2019-12-27 23:27:24,685 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 4211 transitions. Word has length 44 [2019-12-27 23:27:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:24,685 INFO L462 AbstractCegarLoop]: Abstraction has 1725 states and 4211 transitions. [2019-12-27 23:27:24,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:27:24,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 4211 transitions. [2019-12-27 23:27:24,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 23:27:24,687 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:24,687 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:24,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:24,888 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:24,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:24,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1632472384, now seen corresponding path program 10 times [2019-12-27 23:27:24,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:24,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969144517] [2019-12-27 23:27:24,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:25,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969144517] [2019-12-27 23:27:25,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559616103] [2019-12-27 23:27:25,037 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:25,082 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:27:25,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:25,083 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:27:25,084 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:25,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:25,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:25,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:25,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:25,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 23:27:25,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [994231021] [2019-12-27 23:27:25,199 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:25,201 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:25,210 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 69 states and 92 transitions. [2019-12-27 23:27:25,210 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:25,211 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:27:25,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:27:25,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:25,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:27:25,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:27:25,211 INFO L87 Difference]: Start difference. First operand 1725 states and 4211 transitions. Second operand 11 states. [2019-12-27 23:27:25,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:25,565 INFO L93 Difference]: Finished difference Result 2228 states and 5213 transitions. [2019-12-27 23:27:25,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:27:25,565 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-12-27 23:27:25,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:25,567 INFO L225 Difference]: With dead ends: 2228 [2019-12-27 23:27:25,567 INFO L226 Difference]: Without dead ends: 2040 [2019-12-27 23:27:25,568 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:27:25,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2019-12-27 23:27:25,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1661. [2019-12-27 23:27:25,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1661 states. [2019-12-27 23:27:25,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 4044 transitions. [2019-12-27 23:27:25,585 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 4044 transitions. Word has length 44 [2019-12-27 23:27:25,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:25,585 INFO L462 AbstractCegarLoop]: Abstraction has 1661 states and 4044 transitions. [2019-12-27 23:27:25,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:27:25,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 4044 transitions. [2019-12-27 23:27:25,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:27:25,586 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:25,586 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:25,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:25,787 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:25,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:25,788 INFO L82 PathProgramCache]: Analyzing trace with hash -556105797, now seen corresponding path program 56 times [2019-12-27 23:27:25,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:25,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146162766] [2019-12-27 23:27:25,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:25,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146162766] [2019-12-27 23:27:25,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368557792] [2019-12-27 23:27:25,946 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:25,989 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:27:25,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:25,989 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:27:25,990 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:26,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:26,141 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:26,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:26,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:26,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:27:26,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1102315960] [2019-12-27 23:27:26,153 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:26,156 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:26,177 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 118 states and 186 transitions. [2019-12-27 23:27:26,177 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:26,177 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:27:26,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:27:26,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:26,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:27:26,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:27:26,178 INFO L87 Difference]: Start difference. First operand 1661 states and 4044 transitions. Second operand 12 states. [2019-12-27 23:27:26,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:26,474 INFO L93 Difference]: Finished difference Result 2135 states and 5007 transitions. [2019-12-27 23:27:26,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 23:27:26,474 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:27:26,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:26,476 INFO L225 Difference]: With dead ends: 2135 [2019-12-27 23:27:26,476 INFO L226 Difference]: Without dead ends: 2016 [2019-12-27 23:27:26,477 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2019-12-27 23:27:26,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2019-12-27 23:27:26,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1668. [2019-12-27 23:27:26,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1668 states. [2019-12-27 23:27:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 4061 transitions. [2019-12-27 23:27:26,493 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 4061 transitions. Word has length 48 [2019-12-27 23:27:26,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:26,493 INFO L462 AbstractCegarLoop]: Abstraction has 1668 states and 4061 transitions. [2019-12-27 23:27:26,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:27:26,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 4061 transitions. [2019-12-27 23:27:26,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:27:26,495 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:26,495 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:26,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:26,695 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:26,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:26,696 INFO L82 PathProgramCache]: Analyzing trace with hash -457322979, now seen corresponding path program 57 times [2019-12-27 23:27:26,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:26,697 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663420680] [2019-12-27 23:27:26,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:26,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663420680] [2019-12-27 23:27:26,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042568855] [2019-12-27 23:27:26,857 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:26,904 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 23:27:26,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:26,905 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:27:26,905 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:27,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:27,091 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:27,094 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:27,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:27,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:27:27,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1779580193] [2019-12-27 23:27:27,106 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:27,112 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:27,151 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:27:27,151 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:27,153 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:27:27,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:27:27,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:27,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:27:27,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:27:27,153 INFO L87 Difference]: Start difference. First operand 1668 states and 4061 transitions. Second operand 12 states. [2019-12-27 23:27:27,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:27,548 INFO L93 Difference]: Finished difference Result 2515 states and 5844 transitions. [2019-12-27 23:27:27,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 23:27:27,549 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:27:27,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:27,552 INFO L225 Difference]: With dead ends: 2515 [2019-12-27 23:27:27,552 INFO L226 Difference]: Without dead ends: 2328 [2019-12-27 23:27:27,552 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=605, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:27:27,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2019-12-27 23:27:27,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 1684. [2019-12-27 23:27:27,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1684 states. [2019-12-27 23:27:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 4097 transitions. [2019-12-27 23:27:27,582 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 4097 transitions. Word has length 48 [2019-12-27 23:27:27,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:27,583 INFO L462 AbstractCegarLoop]: Abstraction has 1684 states and 4097 transitions. [2019-12-27 23:27:27,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:27:27,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 4097 transitions. [2019-12-27 23:27:27,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:27:27,585 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:27,586 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:27,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:27,790 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:27,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:27,790 INFO L82 PathProgramCache]: Analyzing trace with hash -447491949, now seen corresponding path program 58 times [2019-12-27 23:27:27,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:27,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798041710] [2019-12-27 23:27:27,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:27,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798041710] [2019-12-27 23:27:27,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120412727] [2019-12-27 23:27:27,976 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:28,025 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:27:28,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:28,026 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:27:28,028 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:30,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:30,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:30,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:30,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:30,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:27:30,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [481819985] [2019-12-27 23:27:30,422 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:30,424 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:30,448 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:27:30,448 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:30,449 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:27:30,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:27:30,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:30,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:27:30,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=297, Unknown=3, NotChecked=0, Total=380 [2019-12-27 23:27:30,449 INFO L87 Difference]: Start difference. First operand 1684 states and 4097 transitions. Second operand 12 states. [2019-12-27 23:27:31,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:31,594 INFO L93 Difference]: Finished difference Result 2271 states and 5291 transitions. [2019-12-27 23:27:31,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 23:27:31,595 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:27:31,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:31,597 INFO L225 Difference]: With dead ends: 2271 [2019-12-27 23:27:31,597 INFO L226 Difference]: Without dead ends: 2152 [2019-12-27 23:27:31,597 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=205, Invalid=603, Unknown=4, NotChecked=0, Total=812 [2019-12-27 23:27:31,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2019-12-27 23:27:31,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 1684. [2019-12-27 23:27:31,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1684 states. [2019-12-27 23:27:31,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 4097 transitions. [2019-12-27 23:27:31,620 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 4097 transitions. Word has length 48 [2019-12-27 23:27:31,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:31,620 INFO L462 AbstractCegarLoop]: Abstraction has 1684 states and 4097 transitions. [2019-12-27 23:27:31,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:27:31,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 4097 transitions. [2019-12-27 23:27:31,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:27:31,622 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:31,622 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:31,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:31,824 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:31,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:31,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1986924233, now seen corresponding path program 59 times [2019-12-27 23:27:31,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:31,826 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801230563] [2019-12-27 23:27:31,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:32,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801230563] [2019-12-27 23:27:32,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489898783] [2019-12-27 23:27:32,005 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:32,052 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:27:32,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:32,053 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:27:32,054 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:33,064 WARN L192 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 23:27:33,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:33,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:33,073 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:33,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:33,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:27:33,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1532119311] [2019-12-27 23:27:33,080 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:33,083 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:33,106 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:27:33,106 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:33,107 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 23:27:33,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:27:33,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:33,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:27:33,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=300, Unknown=1, NotChecked=0, Total=380 [2019-12-27 23:27:33,108 INFO L87 Difference]: Start difference. First operand 1684 states and 4097 transitions. Second operand 12 states. [2019-12-27 23:27:33,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:33,536 INFO L93 Difference]: Finished difference Result 2711 states and 6269 transitions. [2019-12-27 23:27:33,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:27:33,537 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:27:33,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:33,539 INFO L225 Difference]: With dead ends: 2711 [2019-12-27 23:27:33,539 INFO L226 Difference]: Without dead ends: 2520 [2019-12-27 23:27:33,540 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=220, Invalid=649, Unknown=1, NotChecked=0, Total=870 [2019-12-27 23:27:33,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2019-12-27 23:27:33,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 1716. [2019-12-27 23:27:33,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1716 states. [2019-12-27 23:27:33,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 4173 transitions. [2019-12-27 23:27:33,559 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 4173 transitions. Word has length 48 [2019-12-27 23:27:33,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:33,560 INFO L462 AbstractCegarLoop]: Abstraction has 1716 states and 4173 transitions. [2019-12-27 23:27:33,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:27:33,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 4173 transitions. [2019-12-27 23:27:33,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:27:33,562 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:33,562 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:33,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:33,763 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:33,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:33,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1977093203, now seen corresponding path program 60 times [2019-12-27 23:27:33,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:33,765 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527993685] [2019-12-27 23:27:33,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:33,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527993685] [2019-12-27 23:27:33,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283265720] [2019-12-27 23:27:33,997 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:34,074 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:27:34,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:34,075 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:27:34,076 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:37,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:37,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:37,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:37,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:37,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:27:37,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1892491572] [2019-12-27 23:27:37,607 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:37,609 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:37,633 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:27:37,633 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:37,634 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 23:27:37,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:27:37,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:37,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:27:37,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=295, Unknown=4, NotChecked=0, Total=380 [2019-12-27 23:27:37,635 INFO L87 Difference]: Start difference. First operand 1716 states and 4173 transitions. Second operand 12 states. [2019-12-27 23:27:39,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:39,084 INFO L93 Difference]: Finished difference Result 2607 states and 6048 transitions. [2019-12-27 23:27:39,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:27:39,085 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:27:39,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:39,087 INFO L225 Difference]: With dead ends: 2607 [2019-12-27 23:27:39,087 INFO L226 Difference]: Without dead ends: 2408 [2019-12-27 23:27:39,087 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=222, Invalid=642, Unknown=6, NotChecked=0, Total=870 [2019-12-27 23:27:39,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2019-12-27 23:27:39,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 1700. [2019-12-27 23:27:39,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1700 states. [2019-12-27 23:27:39,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 4133 transitions. [2019-12-27 23:27:39,108 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 4133 transitions. Word has length 48 [2019-12-27 23:27:39,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:39,108 INFO L462 AbstractCegarLoop]: Abstraction has 1700 states and 4133 transitions. [2019-12-27 23:27:39,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:27:39,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 4133 transitions. [2019-12-27 23:27:39,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:27:39,110 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:39,110 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:39,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:39,311 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:39,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:39,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1653773161, now seen corresponding path program 61 times [2019-12-27 23:27:39,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:39,312 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071123736] [2019-12-27 23:27:39,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:39,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071123736] [2019-12-27 23:27:39,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367529542] [2019-12-27 23:27:39,457 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:39,501 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:27:39,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:41,494 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:41,495 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:41,497 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:41,513 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:41,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:41,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:27:41,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [251425742] [2019-12-27 23:27:41,514 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:41,518 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:41,549 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:27:41,549 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:41,551 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 23:27:41,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:27:41,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:41,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:27:41,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=293, Unknown=2, NotChecked=0, Total=380 [2019-12-27 23:27:41,552 INFO L87 Difference]: Start difference. First operand 1700 states and 4133 transitions. Second operand 12 states. [2019-12-27 23:27:44,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:44,567 INFO L93 Difference]: Finished difference Result 2575 states and 5968 transitions. [2019-12-27 23:27:44,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:27:44,567 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:27:44,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:44,569 INFO L225 Difference]: With dead ends: 2575 [2019-12-27 23:27:44,570 INFO L226 Difference]: Without dead ends: 2388 [2019-12-27 23:27:44,570 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=224, Invalid=641, Unknown=5, NotChecked=0, Total=870 [2019-12-27 23:27:44,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2019-12-27 23:27:44,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 1716. [2019-12-27 23:27:44,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1716 states. [2019-12-27 23:27:44,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 4169 transitions. [2019-12-27 23:27:44,589 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 4169 transitions. Word has length 48 [2019-12-27 23:27:44,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:44,589 INFO L462 AbstractCegarLoop]: Abstraction has 1716 states and 4169 transitions. [2019-12-27 23:27:44,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:27:44,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 4169 transitions. [2019-12-27 23:27:44,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:27:44,590 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:44,590 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:44,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:44,791 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:44,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:44,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1200652051, now seen corresponding path program 62 times [2019-12-27 23:27:44,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:44,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995886647] [2019-12-27 23:27:44,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:44,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995886647] [2019-12-27 23:27:44,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619376559] [2019-12-27 23:27:44,985 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:45,031 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:27:45,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:45,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:27:45,033 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:48,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:48,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:48,533 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:48,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:48,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:27:48,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [671475856] [2019-12-27 23:27:48,542 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:48,544 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:48,568 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:27:48,568 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:48,569 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 23:27:48,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:27:48,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:48,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:27:48,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:27:48,570 INFO L87 Difference]: Start difference. First operand 1716 states and 4169 transitions. Second operand 12 states. [2019-12-27 23:27:51,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:51,790 INFO L93 Difference]: Finished difference Result 2315 states and 5379 transitions. [2019-12-27 23:27:51,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:27:51,790 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:27:51,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:51,792 INFO L225 Difference]: With dead ends: 2315 [2019-12-27 23:27:51,792 INFO L226 Difference]: Without dead ends: 2196 [2019-12-27 23:27:51,793 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=220, Invalid=647, Unknown=3, NotChecked=0, Total=870 [2019-12-27 23:27:51,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2019-12-27 23:27:51,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 1700. [2019-12-27 23:27:51,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1700 states. [2019-12-27 23:27:51,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 4133 transitions. [2019-12-27 23:27:51,814 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 4133 transitions. Word has length 48 [2019-12-27 23:27:51,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:51,814 INFO L462 AbstractCegarLoop]: Abstraction has 1700 states and 4133 transitions. [2019-12-27 23:27:51,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:27:51,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 4133 transitions. [2019-12-27 23:27:51,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:27:51,816 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:51,816 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:52,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:52,020 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:52,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:52,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1827997871, now seen corresponding path program 63 times [2019-12-27 23:27:52,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:52,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643939201] [2019-12-27 23:27:52,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:52,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643939201] [2019-12-27 23:27:52,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205659813] [2019-12-27 23:27:52,164 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:52,214 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 23:27:52,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:52,215 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:27:52,216 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:52,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:52,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:52,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:52,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:52,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:27:52,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [795670237] [2019-12-27 23:27:52,418 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:52,421 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:52,443 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:27:52,444 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:52,445 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 23:27:52,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:27:52,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:52,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:27:52,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:27:52,446 INFO L87 Difference]: Start difference. First operand 1700 states and 4133 transitions. Second operand 12 states. [2019-12-27 23:27:52,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:52,901 INFO L93 Difference]: Finished difference Result 2739 states and 6336 transitions. [2019-12-27 23:27:52,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:27:52,902 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:27:52,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:52,905 INFO L225 Difference]: With dead ends: 2739 [2019-12-27 23:27:52,906 INFO L226 Difference]: Without dead ends: 2520 [2019-12-27 23:27:52,906 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2019-12-27 23:27:52,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2019-12-27 23:27:52,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 1748. [2019-12-27 23:27:52,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1748 states. [2019-12-27 23:27:52,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 4249 transitions. [2019-12-27 23:27:52,935 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 4249 transitions. Word has length 48 [2019-12-27 23:27:52,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:52,936 INFO L462 AbstractCegarLoop]: Abstraction has 1748 states and 4249 transitions. [2019-12-27 23:27:52,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:27:52,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 4249 transitions. [2019-12-27 23:27:52,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:27:52,937 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:52,938 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:53,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:53,142 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:53,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:53,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1818166841, now seen corresponding path program 64 times [2019-12-27 23:27:53,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:53,143 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140248077] [2019-12-27 23:27:53,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:53,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140248077] [2019-12-27 23:27:53,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37141114] [2019-12-27 23:27:53,332 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:53,378 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:27:53,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:53,379 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:27:53,379 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:53,593 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:53,593 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:53,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:53,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:53,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:27:53,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1983045322] [2019-12-27 23:27:53,605 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:53,608 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:53,630 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:27:53,630 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:53,632 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 23:27:53,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:27:53,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:53,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:27:53,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:27:53,633 INFO L87 Difference]: Start difference. First operand 1748 states and 4249 transitions. Second operand 12 states. [2019-12-27 23:27:54,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:54,152 INFO L93 Difference]: Finished difference Result 2807 states and 6497 transitions. [2019-12-27 23:27:54,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:27:54,152 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:27:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:54,155 INFO L225 Difference]: With dead ends: 2807 [2019-12-27 23:27:54,155 INFO L226 Difference]: Without dead ends: 2616 [2019-12-27 23:27:54,156 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2019-12-27 23:27:54,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2019-12-27 23:27:54,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 1732. [2019-12-27 23:27:54,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2019-12-27 23:27:54,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 4209 transitions. [2019-12-27 23:27:54,176 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 4209 transitions. Word has length 48 [2019-12-27 23:27:54,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:54,177 INFO L462 AbstractCegarLoop]: Abstraction has 1732 states and 4209 transitions. [2019-12-27 23:27:54,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:27:54,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 4209 transitions. [2019-12-27 23:27:54,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:27:54,178 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:54,178 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:54,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:54,379 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:54,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:54,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1494846799, now seen corresponding path program 65 times [2019-12-27 23:27:54,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:54,380 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743930968] [2019-12-27 23:27:54,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:54,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743930968] [2019-12-27 23:27:54,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317763229] [2019-12-27 23:27:54,566 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:54,615 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:27:54,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:54,617 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:27:54,618 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:27:54,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:54,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:54,882 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:27:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:54,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:27:54,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:27:54,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [345860978] [2019-12-27 23:27:54,890 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:27:54,893 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:27:54,916 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:27:54,916 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:27:54,917 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 11 times. [2019-12-27 23:27:54,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:27:54,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:27:54,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:27:54,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:27:54,918 INFO L87 Difference]: Start difference. First operand 1732 states and 4209 transitions. Second operand 12 states. [2019-12-27 23:27:55,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:27:55,412 INFO L93 Difference]: Finished difference Result 2803 states and 6481 transitions. [2019-12-27 23:27:55,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:27:55,412 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:27:55,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:27:55,415 INFO L225 Difference]: With dead ends: 2803 [2019-12-27 23:27:55,415 INFO L226 Difference]: Without dead ends: 2612 [2019-12-27 23:27:55,415 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2019-12-27 23:27:55,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2019-12-27 23:27:55,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 1748. [2019-12-27 23:27:55,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1748 states. [2019-12-27 23:27:55,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 4249 transitions. [2019-12-27 23:27:55,434 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 4249 transitions. Word has length 48 [2019-12-27 23:27:55,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:27:55,434 INFO L462 AbstractCegarLoop]: Abstraction has 1748 states and 4249 transitions. [2019-12-27 23:27:55,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:27:55,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 4249 transitions. [2019-12-27 23:27:55,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:27:55,435 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:27:55,435 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:27:55,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:27:55,636 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:27:55,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:27:55,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1041725689, now seen corresponding path program 66 times [2019-12-27 23:27:55,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:27:55,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596067865] [2019-12-27 23:27:55,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:27:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:27:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:27:55,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596067865] [2019-12-27 23:27:55,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292880401] [2019-12-27 23:27:55,798 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:27:55,865 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:27:55,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:27:55,866 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:27:55,867 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:28:02,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:02,218 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:02,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:28:02,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:28:02,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:28:02,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1280917815] [2019-12-27 23:28:02,238 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:28:02,242 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:28:02,275 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:28:02,275 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:28:02,276 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 23:28:02,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:28:02,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:28:02,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:28:02,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:28:02,277 INFO L87 Difference]: Start difference. First operand 1748 states and 4249 transitions. Second operand 12 states. [2019-12-27 23:28:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:28:08,861 INFO L93 Difference]: Finished difference Result 2667 states and 6176 transitions. [2019-12-27 23:28:08,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:28:08,862 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:28:08,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:28:08,879 INFO L225 Difference]: With dead ends: 2667 [2019-12-27 23:28:08,880 INFO L226 Difference]: Without dead ends: 2456 [2019-12-27 23:28:08,880 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=233, Invalid=694, Unknown=3, NotChecked=0, Total=930 [2019-12-27 23:28:08,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2019-12-27 23:28:08,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 1716. [2019-12-27 23:28:08,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1716 states. [2019-12-27 23:28:08,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 4169 transitions. [2019-12-27 23:28:08,899 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 4169 transitions. Word has length 48 [2019-12-27 23:28:08,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:28:08,899 INFO L462 AbstractCegarLoop]: Abstraction has 1716 states and 4169 transitions. [2019-12-27 23:28:08,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:28:08,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 4169 transitions. [2019-12-27 23:28:08,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:28:08,900 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:28:08,900 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:28:09,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:28:09,101 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:28:09,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:28:09,102 INFO L82 PathProgramCache]: Analyzing trace with hash 200917681, now seen corresponding path program 67 times [2019-12-27 23:28:09,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:28:09,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383103173] [2019-12-27 23:28:09,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:28:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:28:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:28:09,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383103173] [2019-12-27 23:28:09,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316881426] [2019-12-27 23:28:09,246 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:28:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:28:09,293 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:28:09,294 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:28:17,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:17,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:17,674 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:28:17,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:28:17,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:28:17,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1575523153] [2019-12-27 23:28:17,686 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:28:17,688 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:28:17,717 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:28:17,717 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:28:17,719 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 11 times. [2019-12-27 23:28:17,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:28:17,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:28:17,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:28:17,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:28:17,719 INFO L87 Difference]: Start difference. First operand 1716 states and 4169 transitions. Second operand 12 states. [2019-12-27 23:28:20,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:28:20,328 INFO L93 Difference]: Finished difference Result 2791 states and 6445 transitions. [2019-12-27 23:28:20,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:28:20,328 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:28:20,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:28:20,331 INFO L225 Difference]: With dead ends: 2791 [2019-12-27 23:28:20,331 INFO L226 Difference]: Without dead ends: 2600 [2019-12-27 23:28:20,332 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=232, Invalid=697, Unknown=1, NotChecked=0, Total=930 [2019-12-27 23:28:20,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2019-12-27 23:28:20,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 1748. [2019-12-27 23:28:20,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1748 states. [2019-12-27 23:28:20,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 4245 transitions. [2019-12-27 23:28:20,354 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 4245 transitions. Word has length 48 [2019-12-27 23:28:20,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:28:20,355 INFO L462 AbstractCegarLoop]: Abstraction has 1748 states and 4245 transitions. [2019-12-27 23:28:20,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:28:20,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 4245 transitions. [2019-12-27 23:28:20,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:28:20,356 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:28:20,356 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:28:20,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:28:20,557 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:28:20,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:28:20,557 INFO L82 PathProgramCache]: Analyzing trace with hash 210748711, now seen corresponding path program 68 times [2019-12-27 23:28:20,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:28:20,558 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522423127] [2019-12-27 23:28:20,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:28:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:28:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:28:20,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522423127] [2019-12-27 23:28:20,722 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412233683] [2019-12-27 23:28:20,722 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:28:20,767 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:28:20,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:28:20,769 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:28:20,770 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:28:21,114 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:21,115 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:21,117 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:28:21,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:28:21,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:28:21,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [809670064] [2019-12-27 23:28:21,126 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:28:21,129 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:28:21,151 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:28:21,151 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:28:21,152 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 11 times. [2019-12-27 23:28:21,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:28:21,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:28:21,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:28:21,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:28:21,153 INFO L87 Difference]: Start difference. First operand 1748 states and 4245 transitions. Second operand 12 states. [2019-12-27 23:28:21,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:28:21,681 INFO L93 Difference]: Finished difference Result 2579 states and 5988 transitions. [2019-12-27 23:28:21,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:28:21,682 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:28:21,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:28:21,684 INFO L225 Difference]: With dead ends: 2579 [2019-12-27 23:28:21,684 INFO L226 Difference]: Without dead ends: 2380 [2019-12-27 23:28:21,684 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=236, Invalid=694, Unknown=0, NotChecked=0, Total=930 [2019-12-27 23:28:21,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2019-12-27 23:28:21,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1732. [2019-12-27 23:28:21,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2019-12-27 23:28:21,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 4205 transitions. [2019-12-27 23:28:21,715 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 4205 transitions. Word has length 48 [2019-12-27 23:28:21,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:28:21,715 INFO L462 AbstractCegarLoop]: Abstraction has 1732 states and 4205 transitions. [2019-12-27 23:28:21,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:28:21,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 4205 transitions. [2019-12-27 23:28:21,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:28:21,717 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:28:21,717 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:28:21,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:28:21,917 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:28:21,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:28:21,918 INFO L82 PathProgramCache]: Analyzing trace with hash 539320305, now seen corresponding path program 69 times [2019-12-27 23:28:21,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:28:21,919 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854429417] [2019-12-27 23:28:21,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:28:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:28:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:28:22,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854429417] [2019-12-27 23:28:22,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223447072] [2019-12-27 23:28:22,060 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:28:22,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 23:28:22,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:28:22,110 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:28:22,111 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:28:26,807 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:26,808 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:26,810 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:28:26,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:28:26,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:28:26,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1224021565] [2019-12-27 23:28:26,821 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:28:26,824 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:28:26,846 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:28:26,847 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:28:26,848 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 11 times. [2019-12-27 23:28:26,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:28:26,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:28:26,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:28:26,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=296, Unknown=1, NotChecked=0, Total=380 [2019-12-27 23:28:26,848 INFO L87 Difference]: Start difference. First operand 1732 states and 4205 transitions. Second operand 12 states. [2019-12-27 23:28:27,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:28:27,685 INFO L93 Difference]: Finished difference Result 2583 states and 5988 transitions. [2019-12-27 23:28:27,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:28:27,686 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:28:27,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:28:27,688 INFO L225 Difference]: With dead ends: 2583 [2019-12-27 23:28:27,688 INFO L226 Difference]: Without dead ends: 2396 [2019-12-27 23:28:27,689 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=233, Invalid=696, Unknown=1, NotChecked=0, Total=930 [2019-12-27 23:28:27,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2019-12-27 23:28:27,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 1748. [2019-12-27 23:28:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1748 states. [2019-12-27 23:28:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 4241 transitions. [2019-12-27 23:28:27,707 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 4241 transitions. Word has length 48 [2019-12-27 23:28:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:28:27,707 INFO L462 AbstractCegarLoop]: Abstraction has 1748 states and 4241 transitions. [2019-12-27 23:28:27,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:28:27,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 4241 transitions. [2019-12-27 23:28:27,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:28:27,708 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:28:27,708 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:28:27,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:28:27,909 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:28:27,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:28:27,910 INFO L82 PathProgramCache]: Analyzing trace with hash 992441415, now seen corresponding path program 70 times [2019-12-27 23:28:27,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:28:27,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55739264] [2019-12-27 23:28:27,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:28:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:28:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:28:28,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55739264] [2019-12-27 23:28:28,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896909239] [2019-12-27 23:28:28,056 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:28:28,104 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:28:28,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:28:28,104 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:28:28,105 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:28:40,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:40,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:40,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:28:40,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:28:40,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:28:40,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [150843833] [2019-12-27 23:28:40,570 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:28:40,573 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:28:40,595 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:28:40,596 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:28:40,597 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 23:28:40,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:28:40,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:28:40,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:28:40,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:28:40,597 INFO L87 Difference]: Start difference. First operand 1748 states and 4241 transitions. Second operand 12 states. [2019-12-27 23:28:51,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:28:51,133 INFO L93 Difference]: Finished difference Result 2367 states and 5503 transitions. [2019-12-27 23:28:51,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 23:28:51,133 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:28:51,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:28:51,135 INFO L225 Difference]: With dead ends: 2367 [2019-12-27 23:28:51,136 INFO L226 Difference]: Without dead ends: 2248 [2019-12-27 23:28:51,136 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=226, Invalid=699, Unknown=5, NotChecked=0, Total=930 [2019-12-27 23:28:51,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2019-12-27 23:28:51,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1716. [2019-12-27 23:28:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1716 states. [2019-12-27 23:28:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 4169 transitions. [2019-12-27 23:28:51,155 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 4169 transitions. Word has length 48 [2019-12-27 23:28:51,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:28:51,155 INFO L462 AbstractCegarLoop]: Abstraction has 1716 states and 4169 transitions. [2019-12-27 23:28:51,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:28:51,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 4169 transitions. [2019-12-27 23:28:51,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:28:51,156 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:28:51,156 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:28:51,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:28:51,357 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:28:51,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:28:51,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1912643477, now seen corresponding path program 71 times [2019-12-27 23:28:51,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:28:51,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118344692] [2019-12-27 23:28:51,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:28:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:28:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:28:51,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118344692] [2019-12-27 23:28:51,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454640271] [2019-12-27 23:28:51,537 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:28:51,581 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-27 23:28:51,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:28:51,582 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:28:51,583 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:28:51,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:51,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:51,738 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:28:51,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:28:51,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:28:51,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1198982434] [2019-12-27 23:28:51,744 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:28:51,747 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:28:51,772 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:28:51,772 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:28:51,774 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 15 times. [2019-12-27 23:28:51,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:28:51,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:28:51,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:28:51,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:28:51,774 INFO L87 Difference]: Start difference. First operand 1716 states and 4169 transitions. Second operand 12 states. [2019-12-27 23:28:52,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:28:52,252 INFO L93 Difference]: Finished difference Result 2771 states and 6407 transitions. [2019-12-27 23:28:52,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:28:52,252 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:28:52,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:28:52,255 INFO L225 Difference]: With dead ends: 2771 [2019-12-27 23:28:52,255 INFO L226 Difference]: Without dead ends: 2524 [2019-12-27 23:28:52,255 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=238, Invalid=754, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:28:52,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2019-12-27 23:28:52,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 1780. [2019-12-27 23:28:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1780 states. [2019-12-27 23:28:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 4325 transitions. [2019-12-27 23:28:52,275 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 4325 transitions. Word has length 48 [2019-12-27 23:28:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:28:52,275 INFO L462 AbstractCegarLoop]: Abstraction has 1780 states and 4325 transitions. [2019-12-27 23:28:52,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:28:52,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 4325 transitions. [2019-12-27 23:28:52,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:28:52,276 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:28:52,276 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:28:52,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:28:52,477 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:28:52,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:28:52,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1902812447, now seen corresponding path program 72 times [2019-12-27 23:28:52,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:28:52,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528225499] [2019-12-27 23:28:52,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:28:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:28:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:28:52,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528225499] [2019-12-27 23:28:52,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550453482] [2019-12-27 23:28:52,623 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:28:52,672 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:28:52,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:28:52,673 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 23:28:52,673 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:28:52,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:52,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:52,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:28:52,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:28:52,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:28:52,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1330778009] [2019-12-27 23:28:52,837 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:28:52,841 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:28:52,870 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:28:52,871 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:28:52,873 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 15 times. [2019-12-27 23:28:52,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:28:52,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:28:52,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:28:52,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:28:52,873 INFO L87 Difference]: Start difference. First operand 1780 states and 4325 transitions. Second operand 12 states. [2019-12-27 23:28:53,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:28:53,366 INFO L93 Difference]: Finished difference Result 2791 states and 6468 transitions. [2019-12-27 23:28:53,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:28:53,366 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:28:53,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:28:53,369 INFO L225 Difference]: With dead ends: 2791 [2019-12-27 23:28:53,369 INFO L226 Difference]: Without dead ends: 2572 [2019-12-27 23:28:53,370 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=238, Invalid=754, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:28:53,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2019-12-27 23:28:53,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 1764. [2019-12-27 23:28:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1764 states. [2019-12-27 23:28:53,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 4285 transitions. [2019-12-27 23:28:53,391 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 4285 transitions. Word has length 48 [2019-12-27 23:28:53,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:28:53,391 INFO L462 AbstractCegarLoop]: Abstraction has 1764 states and 4285 transitions. [2019-12-27 23:28:53,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:28:53,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 4285 transitions. [2019-12-27 23:28:53,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:28:53,392 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:28:53,392 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:28:53,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:28:53,593 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:28:53,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:28:53,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1579492405, now seen corresponding path program 73 times [2019-12-27 23:28:53,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:28:53,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596885785] [2019-12-27 23:28:53,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:28:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:28:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:28:53,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596885785] [2019-12-27 23:28:53,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152465198] [2019-12-27 23:28:53,741 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:28:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:28:53,786 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:28:53,786 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:28:56,939 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:56,939 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:56,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:28:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:28:56,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:28:56,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:28:56,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1191627754] [2019-12-27 23:28:56,949 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:28:56,952 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:28:56,975 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:28:56,975 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:28:56,977 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 14 times. [2019-12-27 23:28:56,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:28:56,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:28:56,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:28:56,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=298, Unknown=1, NotChecked=0, Total=380 [2019-12-27 23:28:56,978 INFO L87 Difference]: Start difference. First operand 1764 states and 4285 transitions. Second operand 12 states. [2019-12-27 23:29:01,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:29:01,577 INFO L93 Difference]: Finished difference Result 2815 states and 6512 transitions. [2019-12-27 23:29:01,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:29:01,578 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:29:01,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:29:01,580 INFO L225 Difference]: With dead ends: 2815 [2019-12-27 23:29:01,580 INFO L226 Difference]: Without dead ends: 2596 [2019-12-27 23:29:01,581 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=241, Invalid=742, Unknown=9, NotChecked=0, Total=992 [2019-12-27 23:29:01,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2019-12-27 23:29:01,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1780. [2019-12-27 23:29:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1780 states. [2019-12-27 23:29:01,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 4325 transitions. [2019-12-27 23:29:01,599 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 4325 transitions. Word has length 48 [2019-12-27 23:29:01,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:29:01,599 INFO L462 AbstractCegarLoop]: Abstraction has 1780 states and 4325 transitions. [2019-12-27 23:29:01,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:29:01,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 4325 transitions. [2019-12-27 23:29:01,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:29:01,600 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:29:01,600 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:29:01,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:01,801 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:29:01,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:29:01,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1126371295, now seen corresponding path program 74 times [2019-12-27 23:29:01,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:29:01,803 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897697785] [2019-12-27 23:29:01,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:29:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:01,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897697785] [2019-12-27 23:29:01,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228534213] [2019-12-27 23:29:01,955 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:29:02,002 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:29:02,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:29:02,003 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:29:02,004 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:29:03,689 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:03,689 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:03,691 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:03,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:29:03,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:29:03,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1493305534] [2019-12-27 23:29:03,700 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:29:03,703 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:29:03,747 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:29:03,747 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:29:03,749 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 15 times. [2019-12-27 23:29:03,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:29:03,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:29:03,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:29:03,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=299, Unknown=2, NotChecked=0, Total=380 [2019-12-27 23:29:03,749 INFO L87 Difference]: Start difference. First operand 1780 states and 4325 transitions. Second operand 12 states. [2019-12-27 23:29:05,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:29:05,114 INFO L93 Difference]: Finished difference Result 2807 states and 6501 transitions. [2019-12-27 23:29:05,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:29:05,114 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:29:05,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:29:05,117 INFO L225 Difference]: With dead ends: 2807 [2019-12-27 23:29:05,117 INFO L226 Difference]: Without dead ends: 2616 [2019-12-27 23:29:05,117 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=237, Invalid=751, Unknown=4, NotChecked=0, Total=992 [2019-12-27 23:29:05,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2019-12-27 23:29:05,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 1748. [2019-12-27 23:29:05,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1748 states. [2019-12-27 23:29:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 4245 transitions. [2019-12-27 23:29:05,136 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 4245 transitions. Word has length 48 [2019-12-27 23:29:05,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:29:05,137 INFO L462 AbstractCegarLoop]: Abstraction has 1748 states and 4245 transitions. [2019-12-27 23:29:05,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:29:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 4245 transitions. [2019-12-27 23:29:05,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:29:05,138 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:29:05,138 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:29:05,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:05,339 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:29:05,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:29:05,339 INFO L82 PathProgramCache]: Analyzing trace with hash 116272075, now seen corresponding path program 75 times [2019-12-27 23:29:05,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:29:05,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323507857] [2019-12-27 23:29:05,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:29:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:05,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323507857] [2019-12-27 23:29:05,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877439984] [2019-12-27 23:29:05,486 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:29:05,531 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:29:05,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:29:05,532 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:29:05,533 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:29:07,623 WARN L192 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 23:29:13,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:13,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:13,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:13,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:29:13,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:29:13,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1169778386] [2019-12-27 23:29:13,830 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:29:13,833 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:29:13,858 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:29:13,858 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:29:13,860 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 14 times. [2019-12-27 23:29:13,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:29:13,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:29:13,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:29:13,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=296, Unknown=3, NotChecked=0, Total=380 [2019-12-27 23:29:13,861 INFO L87 Difference]: Start difference. First operand 1748 states and 4245 transitions. Second operand 12 states. [2019-12-27 23:29:25,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:29:25,364 INFO L93 Difference]: Finished difference Result 2991 states and 6880 transitions. [2019-12-27 23:29:25,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 23:29:25,364 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:29:25,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:29:25,367 INFO L225 Difference]: With dead ends: 2991 [2019-12-27 23:29:25,367 INFO L226 Difference]: Without dead ends: 2772 [2019-12-27 23:29:25,367 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=259, Invalid=787, Unknown=10, NotChecked=0, Total=1056 [2019-12-27 23:29:25,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2019-12-27 23:29:25,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 1780. [2019-12-27 23:29:25,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1780 states. [2019-12-27 23:29:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 4325 transitions. [2019-12-27 23:29:25,389 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 4325 transitions. Word has length 48 [2019-12-27 23:29:25,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:29:25,389 INFO L462 AbstractCegarLoop]: Abstraction has 1780 states and 4325 transitions. [2019-12-27 23:29:25,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:29:25,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 4325 transitions. [2019-12-27 23:29:25,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:29:25,391 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:29:25,391 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:29:25,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:25,592 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:29:25,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:29:25,592 INFO L82 PathProgramCache]: Analyzing trace with hash 126103105, now seen corresponding path program 76 times [2019-12-27 23:29:25,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:29:25,593 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301197378] [2019-12-27 23:29:25,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:29:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:25,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301197378] [2019-12-27 23:29:25,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219770782] [2019-12-27 23:29:25,749 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:29:25,796 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:29:25,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:29:25,797 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:29:25,798 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:29:26,900 WARN L192 SmtUtils]: Spent 517.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-27 23:29:27,633 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-27 23:29:27,633 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:27,634 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:27,635 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:27,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:29:27,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:29:27,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1181367338] [2019-12-27 23:29:27,644 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:29:27,647 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:29:27,669 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:29:27,669 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:29:27,671 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 14 times. [2019-12-27 23:29:27,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:29:27,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:29:27,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:29:27,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=296, Unknown=1, NotChecked=0, Total=380 [2019-12-27 23:29:27,671 INFO L87 Difference]: Start difference. First operand 1780 states and 4325 transitions. Second operand 12 states. [2019-12-27 23:29:29,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:29:29,722 INFO L93 Difference]: Finished difference Result 2867 states and 6625 transitions. [2019-12-27 23:29:29,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 23:29:29,723 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:29:29,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:29:29,725 INFO L225 Difference]: With dead ends: 2867 [2019-12-27 23:29:29,725 INFO L226 Difference]: Without dead ends: 2676 [2019-12-27 23:29:29,725 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=276, Invalid=843, Unknown=3, NotChecked=0, Total=1122 [2019-12-27 23:29:29,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2019-12-27 23:29:29,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 1764. [2019-12-27 23:29:29,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1764 states. [2019-12-27 23:29:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 4285 transitions. [2019-12-27 23:29:29,744 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 4285 transitions. Word has length 48 [2019-12-27 23:29:29,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:29:29,744 INFO L462 AbstractCegarLoop]: Abstraction has 1764 states and 4285 transitions. [2019-12-27 23:29:29,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:29:29,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 4285 transitions. [2019-12-27 23:29:29,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:29:29,745 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:29:29,745 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:29:29,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:29,946 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:29:29,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:29:29,947 INFO L82 PathProgramCache]: Analyzing trace with hash 454674699, now seen corresponding path program 77 times [2019-12-27 23:29:29,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:29:29,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148934028] [2019-12-27 23:29:29,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:29:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:30,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148934028] [2019-12-27 23:29:30,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846993578] [2019-12-27 23:29:30,106 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:29:30,178 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 23:29:30,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:29:30,180 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:29:30,181 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:29:30,845 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_262 Int)) (and (<= c_~i~0 (+ c_~j~0 v_~i~0_262)) (<= (div (+ (* v_~i~0_262 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ (* 2 v_~i~0_262) 2)))) is different from true [2019-12-27 23:29:30,907 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:30,907 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:30,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2019-12-27 23:29:30,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:29:30,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:29:30,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [411483218] [2019-12-27 23:29:30,918 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:29:30,920 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:29:30,942 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:29:30,942 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:29:30,943 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 14 times. [2019-12-27 23:29:30,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:29:30,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:29:30,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:29:30,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=268, Unknown=1, NotChecked=34, Total=380 [2019-12-27 23:29:30,944 INFO L87 Difference]: Start difference. First operand 1764 states and 4285 transitions. Second operand 12 states. [2019-12-27 23:29:31,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:29:31,527 INFO L93 Difference]: Finished difference Result 2839 states and 6561 transitions. [2019-12-27 23:29:31,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 23:29:31,528 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:29:31,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:29:31,530 INFO L225 Difference]: With dead ends: 2839 [2019-12-27 23:29:31,530 INFO L226 Difference]: Without dead ends: 2648 [2019-12-27 23:29:31,531 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=260, Invalid=735, Unknown=1, NotChecked=60, Total=1056 [2019-12-27 23:29:31,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2019-12-27 23:29:31,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1780. [2019-12-27 23:29:31,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1780 states. [2019-12-27 23:29:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 4325 transitions. [2019-12-27 23:29:31,550 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 4325 transitions. Word has length 48 [2019-12-27 23:29:31,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:29:31,550 INFO L462 AbstractCegarLoop]: Abstraction has 1780 states and 4325 transitions. [2019-12-27 23:29:31,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:29:31,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 4325 transitions. [2019-12-27 23:29:31,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:29:31,551 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:29:31,551 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:29:31,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:31,752 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:29:31,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:29:31,753 INFO L82 PathProgramCache]: Analyzing trace with hash 907795809, now seen corresponding path program 78 times [2019-12-27 23:29:31,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:29:31,753 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019869268] [2019-12-27 23:29:31,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:29:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:31,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019869268] [2019-12-27 23:29:31,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954529431] [2019-12-27 23:29:31,901 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:29:31,952 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:29:31,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:29:31,953 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-27 23:29:31,954 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:29:32,110 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:32,110 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:32,111 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:32,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:29:32,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2019-12-27 23:29:32,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2058088101] [2019-12-27 23:29:32,118 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:29:32,122 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:29:32,155 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:29:32,155 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:29:32,157 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 15 times. [2019-12-27 23:29:32,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:29:32,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:29:32,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:29:32,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2019-12-27 23:29:32,158 INFO L87 Difference]: Start difference. First operand 1780 states and 4325 transitions. Second operand 12 states. [2019-12-27 23:29:32,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:29:32,675 INFO L93 Difference]: Finished difference Result 2691 states and 6240 transitions. [2019-12-27 23:29:32,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 23:29:32,676 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:29:32,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:29:32,679 INFO L225 Difference]: With dead ends: 2691 [2019-12-27 23:29:32,679 INFO L226 Difference]: Without dead ends: 2468 [2019-12-27 23:29:32,679 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 23:29:32,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2019-12-27 23:29:32,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 1732. [2019-12-27 23:29:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2019-12-27 23:29:32,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 4205 transitions. [2019-12-27 23:29:32,701 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 4205 transitions. Word has length 48 [2019-12-27 23:29:32,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:29:32,701 INFO L462 AbstractCegarLoop]: Abstraction has 1732 states and 4205 transitions. [2019-12-27 23:29:32,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:29:32,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 4205 transitions. [2019-12-27 23:29:32,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:29:32,702 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:29:32,702 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:29:32,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:32,903 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:29:32,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:29:32,903 INFO L82 PathProgramCache]: Analyzing trace with hash 299465675, now seen corresponding path program 79 times [2019-12-27 23:29:32,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:29:32,904 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792613929] [2019-12-27 23:29:32,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:29:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:33,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792613929] [2019-12-27 23:29:33,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800369751] [2019-12-27 23:29:33,070 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:29:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:33,130 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:29:33,131 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:29:33,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:33,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:33,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:33,319 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:33,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:29:33,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:29:33,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1797600998] [2019-12-27 23:29:33,320 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:29:33,323 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:29:33,345 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:29:33,345 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:29:33,346 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 14 times. [2019-12-27 23:29:33,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:29:33,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:29:33,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:29:33,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:29:33,347 INFO L87 Difference]: Start difference. First operand 1732 states and 4205 transitions. Second operand 12 states. [2019-12-27 23:29:33,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:29:33,854 INFO L93 Difference]: Finished difference Result 2947 states and 6776 transitions. [2019-12-27 23:29:33,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 23:29:33,854 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:29:33,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:29:33,857 INFO L225 Difference]: With dead ends: 2947 [2019-12-27 23:29:33,857 INFO L226 Difference]: Without dead ends: 2728 [2019-12-27 23:29:33,857 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 23:29:33,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2019-12-27 23:29:33,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 1780. [2019-12-27 23:29:33,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1780 states. [2019-12-27 23:29:33,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 4321 transitions. [2019-12-27 23:29:33,878 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 4321 transitions. Word has length 48 [2019-12-27 23:29:33,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:29:33,878 INFO L462 AbstractCegarLoop]: Abstraction has 1780 states and 4321 transitions. [2019-12-27 23:29:33,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:29:33,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 4321 transitions. [2019-12-27 23:29:33,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:29:33,879 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:29:33,879 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:29:34,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:34,082 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:29:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:29:34,082 INFO L82 PathProgramCache]: Analyzing trace with hash 309296705, now seen corresponding path program 80 times [2019-12-27 23:29:34,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:29:34,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190896988] [2019-12-27 23:29:34,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:29:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:34,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190896988] [2019-12-27 23:29:34,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916766195] [2019-12-27 23:29:34,235 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:29:34,282 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:29:34,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:29:34,283 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:29:34,284 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:29:35,974 WARN L192 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-27 23:29:35,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:35,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:35,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:35,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:29:35,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:29:35,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1454331229] [2019-12-27 23:29:35,986 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:29:35,989 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:29:36,011 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:29:36,011 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:29:36,013 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 14 times. [2019-12-27 23:29:36,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:29:36,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:29:36,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:29:36,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=296, Unknown=2, NotChecked=0, Total=380 [2019-12-27 23:29:36,013 INFO L87 Difference]: Start difference. First operand 1780 states and 4321 transitions. Second operand 12 states. [2019-12-27 23:29:37,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:29:37,477 INFO L93 Difference]: Finished difference Result 2831 states and 6549 transitions. [2019-12-27 23:29:37,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 23:29:37,478 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:29:37,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:29:37,481 INFO L225 Difference]: With dead ends: 2831 [2019-12-27 23:29:37,481 INFO L226 Difference]: Without dead ends: 2640 [2019-12-27 23:29:37,482 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=264, Invalid=789, Unknown=3, NotChecked=0, Total=1056 [2019-12-27 23:29:37,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2019-12-27 23:29:37,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1764. [2019-12-27 23:29:37,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1764 states. [2019-12-27 23:29:37,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 4281 transitions. [2019-12-27 23:29:37,502 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 4281 transitions. Word has length 48 [2019-12-27 23:29:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:29:37,503 INFO L462 AbstractCegarLoop]: Abstraction has 1764 states and 4281 transitions. [2019-12-27 23:29:37,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:29:37,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 4281 transitions. [2019-12-27 23:29:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:29:37,504 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:29:37,504 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:29:37,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:37,705 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:29:37,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:29:37,705 INFO L82 PathProgramCache]: Analyzing trace with hash 632616747, now seen corresponding path program 81 times [2019-12-27 23:29:37,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:29:37,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532884196] [2019-12-27 23:29:37,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:29:37,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:37,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532884196] [2019-12-27 23:29:37,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861573474] [2019-12-27 23:29:37,852 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:29:37,900 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:29:37,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:29:37,901 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:29:37,902 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:29:38,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:38,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:38,056 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:38,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:29:38,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:29:38,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1729444421] [2019-12-27 23:29:38,062 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:29:38,064 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:29:38,085 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:29:38,085 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:29:38,086 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 13 times. [2019-12-27 23:29:38,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:29:38,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:29:38,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:29:38,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:29:38,087 INFO L87 Difference]: Start difference. First operand 1764 states and 4281 transitions. Second operand 12 states. [2019-12-27 23:29:38,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:29:38,565 INFO L93 Difference]: Finished difference Result 2715 states and 6297 transitions. [2019-12-27 23:29:38,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:29:38,566 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:29:38,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:29:38,569 INFO L225 Difference]: With dead ends: 2715 [2019-12-27 23:29:38,569 INFO L226 Difference]: Without dead ends: 2524 [2019-12-27 23:29:38,570 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:29:38,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2019-12-27 23:29:38,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 1780. [2019-12-27 23:29:38,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1780 states. [2019-12-27 23:29:38,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 4321 transitions. [2019-12-27 23:29:38,590 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 4321 transitions. Word has length 48 [2019-12-27 23:29:38,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:29:38,590 INFO L462 AbstractCegarLoop]: Abstraction has 1780 states and 4321 transitions. [2019-12-27 23:29:38,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:29:38,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 4321 transitions. [2019-12-27 23:29:38,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:29:38,592 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:29:38,592 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:29:38,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:38,792 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:29:38,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:29:38,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1085737857, now seen corresponding path program 82 times [2019-12-27 23:29:38,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:29:38,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482044448] [2019-12-27 23:29:38,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:29:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:38,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482044448] [2019-12-27 23:29:38,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684689969] [2019-12-27 23:29:38,955 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:29:39,003 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:29:39,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:29:39,004 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:29:39,004 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:29:39,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:39,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:39,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:39,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:29:39,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:29:39,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2113599624] [2019-12-27 23:29:39,152 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:29:39,155 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:29:39,178 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:29:39,178 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:29:39,180 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 14 times. [2019-12-27 23:29:39,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:29:39,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:29:39,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:29:39,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:29:39,181 INFO L87 Difference]: Start difference. First operand 1780 states and 4321 transitions. Second operand 12 states. [2019-12-27 23:29:39,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:29:39,661 INFO L93 Difference]: Finished difference Result 2687 states and 6220 transitions. [2019-12-27 23:29:39,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:29:39,661 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:29:39,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:29:39,664 INFO L225 Difference]: With dead ends: 2687 [2019-12-27 23:29:39,664 INFO L226 Difference]: Without dead ends: 2476 [2019-12-27 23:29:39,664 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:29:39,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2019-12-27 23:29:39,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1748. [2019-12-27 23:29:39,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1748 states. [2019-12-27 23:29:39,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 4241 transitions. [2019-12-27 23:29:39,684 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 4241 transitions. Word has length 48 [2019-12-27 23:29:39,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:29:39,684 INFO L462 AbstractCegarLoop]: Abstraction has 1748 states and 4241 transitions. [2019-12-27 23:29:39,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:29:39,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 4241 transitions. [2019-12-27 23:29:39,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:29:39,685 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:29:39,685 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:29:39,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:39,886 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:29:39,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:29:39,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1066108661, now seen corresponding path program 83 times [2019-12-27 23:29:39,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:29:39,887 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58320933] [2019-12-27 23:29:39,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:29:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:40,030 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58320933] [2019-12-27 23:29:40,030 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456504570] [2019-12-27 23:29:40,030 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:29:40,077 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:29:40,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:29:40,078 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:29:40,079 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:29:40,599 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_335 Int)) (and (<= (div (+ (* v_~j~0_335 (- 1)) 2) (- 2)) 3) (<= c_~i~0 (+ (* 2 v_~j~0_335) 3)) (<= c_~j~0 (+ c_~i~0 v_~j~0_335)))) is different from true [2019-12-27 23:29:40,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:40,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:40,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:40,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:29:40,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:29:40,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1489742883] [2019-12-27 23:29:40,610 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:29:40,627 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:29:40,650 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:29:40,650 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:29:40,651 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 14 times. [2019-12-27 23:29:40,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:29:40,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:29:40,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:29:40,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=269, Unknown=1, NotChecked=34, Total=380 [2019-12-27 23:29:40,652 INFO L87 Difference]: Start difference. First operand 1748 states and 4241 transitions. Second operand 12 states. [2019-12-27 23:29:41,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:29:41,136 INFO L93 Difference]: Finished difference Result 2731 states and 6329 transitions. [2019-12-27 23:29:41,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:29:41,137 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:29:41,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:29:41,139 INFO L225 Difference]: With dead ends: 2731 [2019-12-27 23:29:41,139 INFO L226 Difference]: Without dead ends: 2540 [2019-12-27 23:29:41,140 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=236, Invalid=697, Unknown=1, NotChecked=58, Total=992 [2019-12-27 23:29:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2019-12-27 23:29:41,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 1780. [2019-12-27 23:29:41,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1780 states. [2019-12-27 23:29:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 4317 transitions. [2019-12-27 23:29:41,160 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 4317 transitions. Word has length 48 [2019-12-27 23:29:41,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:29:41,161 INFO L462 AbstractCegarLoop]: Abstraction has 1780 states and 4317 transitions. [2019-12-27 23:29:41,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:29:41,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 4317 transitions. [2019-12-27 23:29:41,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:29:41,162 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:29:41,162 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:29:41,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:41,363 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:29:41,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:29:41,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1056277631, now seen corresponding path program 84 times [2019-12-27 23:29:41,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:29:41,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056203239] [2019-12-27 23:29:41,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:29:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:41,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056203239] [2019-12-27 23:29:41,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034347370] [2019-12-27 23:29:41,540 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:29:41,588 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:29:41,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:29:41,589 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-27 23:29:41,590 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:29:41,740 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:41,741 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:41,744 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:41,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:29:41,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2019-12-27 23:29:41,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [108531271] [2019-12-27 23:29:41,750 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:29:41,753 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:29:41,776 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:29:41,776 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:29:41,777 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 14 times. [2019-12-27 23:29:41,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:29:41,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:29:41,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:29:41,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2019-12-27 23:29:41,778 INFO L87 Difference]: Start difference. First operand 1780 states and 4317 transitions. Second operand 12 states. [2019-12-27 23:29:42,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:29:42,270 INFO L93 Difference]: Finished difference Result 2603 states and 6040 transitions. [2019-12-27 23:29:42,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:29:42,270 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:29:42,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:29:42,273 INFO L225 Difference]: With dead ends: 2603 [2019-12-27 23:29:42,273 INFO L226 Difference]: Without dead ends: 2404 [2019-12-27 23:29:42,273 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=814, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 23:29:42,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2019-12-27 23:29:42,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 1764. [2019-12-27 23:29:42,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1764 states. [2019-12-27 23:29:42,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 4277 transitions. [2019-12-27 23:29:42,293 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 4277 transitions. Word has length 48 [2019-12-27 23:29:42,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:29:42,293 INFO L462 AbstractCegarLoop]: Abstraction has 1764 states and 4277 transitions. [2019-12-27 23:29:42,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:29:42,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 4277 transitions. [2019-12-27 23:29:42,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:29:42,294 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:29:42,294 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:29:42,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:42,495 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:29:42,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:29:42,495 INFO L82 PathProgramCache]: Analyzing trace with hash -727706037, now seen corresponding path program 85 times [2019-12-27 23:29:42,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:29:42,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536919246] [2019-12-27 23:29:42,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:29:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:42,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536919246] [2019-12-27 23:29:42,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797700482] [2019-12-27 23:29:42,652 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:29:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:42,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:29:42,699 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:29:43,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:43,066 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:43,067 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:43,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:29:43,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:29:43,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1993064628] [2019-12-27 23:29:43,075 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:29:43,078 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:29:43,100 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:29:43,100 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:29:43,102 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 14 times. [2019-12-27 23:29:43,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:29:43,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:29:43,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:29:43,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:29:43,103 INFO L87 Difference]: Start difference. First operand 1764 states and 4277 transitions. Second operand 12 states. [2019-12-27 23:29:43,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:29:43,607 INFO L93 Difference]: Finished difference Result 2551 states and 5932 transitions. [2019-12-27 23:29:43,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:29:43,607 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:29:43,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:29:43,609 INFO L225 Difference]: With dead ends: 2551 [2019-12-27 23:29:43,610 INFO L226 Difference]: Without dead ends: 2364 [2019-12-27 23:29:43,610 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:29:43,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2019-12-27 23:29:43,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 1780. [2019-12-27 23:29:43,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1780 states. [2019-12-27 23:29:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 4313 transitions. [2019-12-27 23:29:43,645 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 4313 transitions. Word has length 48 [2019-12-27 23:29:43,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:29:43,645 INFO L462 AbstractCegarLoop]: Abstraction has 1780 states and 4313 transitions. [2019-12-27 23:29:43,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:29:43,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 4313 transitions. [2019-12-27 23:29:43,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:29:43,646 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:29:43,647 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:29:43,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:43,847 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:29:43,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:29:43,848 INFO L82 PathProgramCache]: Analyzing trace with hash -274584927, now seen corresponding path program 86 times [2019-12-27 23:29:43,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:29:43,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968276895] [2019-12-27 23:29:43,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:29:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:44,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968276895] [2019-12-27 23:29:44,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42312929] [2019-12-27 23:29:44,052 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:29:44,121 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:29:44,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:29:44,122 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:29:44,123 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:29:44,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:44,291 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:44,292 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:44,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:29:44,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:29:44,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [919665331] [2019-12-27 23:29:44,300 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:29:44,304 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:29:44,337 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 130 states and 210 transitions. [2019-12-27 23:29:44,337 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:29:44,339 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 15 times. [2019-12-27 23:29:44,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:29:44,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:29:44,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:29:44,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:29:44,339 INFO L87 Difference]: Start difference. First operand 1780 states and 4313 transitions. Second operand 12 states. [2019-12-27 23:29:44,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:29:44,745 INFO L93 Difference]: Finished difference Result 2363 states and 5515 transitions. [2019-12-27 23:29:44,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:29:44,746 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:29:44,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:29:44,748 INFO L225 Difference]: With dead ends: 2363 [2019-12-27 23:29:44,748 INFO L226 Difference]: Without dead ends: 2244 [2019-12-27 23:29:44,749 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=229, Invalid=763, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:29:44,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2019-12-27 23:29:44,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1732. [2019-12-27 23:29:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2019-12-27 23:29:44,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 4205 transitions. [2019-12-27 23:29:44,767 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 4205 transitions. Word has length 48 [2019-12-27 23:29:44,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:29:44,767 INFO L462 AbstractCegarLoop]: Abstraction has 1732 states and 4205 transitions. [2019-12-27 23:29:44,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:29:44,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 4205 transitions. [2019-12-27 23:29:44,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:29:44,768 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:29:44,768 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:29:44,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:44,969 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:29:44,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:29:44,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1207587707, now seen corresponding path program 9 times [2019-12-27 23:29:44,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:29:44,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444167965] [2019-12-27 23:29:44,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:29:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:45,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444167965] [2019-12-27 23:29:45,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443534261] [2019-12-27 23:29:45,050 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 23:29:45,097 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-27 23:29:45,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:29:45,098 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 23:29:45,098 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:29:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:45,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 23:29:45,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2019-12-27 23:29:45,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1871568561] [2019-12-27 23:29:45,124 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:29:45,127 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:29:45,173 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 193 states and 336 transitions. [2019-12-27 23:29:45,174 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:29:45,181 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 72 times. [2019-12-27 23:29:45,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:29:45,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:29:45,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:29:45,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:29:45,182 INFO L87 Difference]: Start difference. First operand 1732 states and 4205 transitions. Second operand 13 states. [2019-12-27 23:29:45,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:29:45,358 INFO L93 Difference]: Finished difference Result 2370 states and 5708 transitions. [2019-12-27 23:29:45,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 23:29:45,358 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2019-12-27 23:29:45,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:29:45,360 INFO L225 Difference]: With dead ends: 2370 [2019-12-27 23:29:45,360 INFO L226 Difference]: Without dead ends: 2226 [2019-12-27 23:29:45,361 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:29:45,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2019-12-27 23:29:45,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 2226. [2019-12-27 23:29:45,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2226 states. [2019-12-27 23:29:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 5382 transitions. [2019-12-27 23:29:45,382 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 5382 transitions. Word has length 48 [2019-12-27 23:29:45,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:29:45,382 INFO L462 AbstractCegarLoop]: Abstraction has 2226 states and 5382 transitions. [2019-12-27 23:29:45,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:29:45,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 5382 transitions. [2019-12-27 23:29:45,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:29:45,383 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:29:45,383 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:29:45,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:45,584 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:29:45,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:29:45,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1291469803, now seen corresponding path program 87 times [2019-12-27 23:29:45,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:29:45,585 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213746625] [2019-12-27 23:29:45,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:29:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:45,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213746625] [2019-12-27 23:29:45,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943440029] [2019-12-27 23:29:45,740 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:45,790 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 23:29:45,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:29:45,791 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:29:45,791 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:29:45,952 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:45,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:45,961 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:45,966 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:45,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:29:45,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:29:45,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1505752491] [2019-12-27 23:29:45,967 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:29:45,970 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:29:45,997 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 169 states and 288 transitions. [2019-12-27 23:29:45,997 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:29:46,001 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 30 times. [2019-12-27 23:29:46,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:29:46,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:29:46,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:29:46,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:29:46,002 INFO L87 Difference]: Start difference. First operand 2226 states and 5382 transitions. Second operand 12 states. [2019-12-27 23:29:46,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:29:46,472 INFO L93 Difference]: Finished difference Result 2893 states and 6739 transitions. [2019-12-27 23:29:46,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 23:29:46,472 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:29:46,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:29:46,476 INFO L225 Difference]: With dead ends: 2893 [2019-12-27 23:29:46,476 INFO L226 Difference]: Without dead ends: 2718 [2019-12-27 23:29:46,476 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 23:29:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2718 states. [2019-12-27 23:29:46,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2718 to 2205. [2019-12-27 23:29:46,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2205 states. [2019-12-27 23:29:46,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 5347 transitions. [2019-12-27 23:29:46,501 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 5347 transitions. Word has length 48 [2019-12-27 23:29:46,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:29:46,501 INFO L462 AbstractCegarLoop]: Abstraction has 2205 states and 5347 transitions. [2019-12-27 23:29:46,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:29:46,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 5347 transitions. [2019-12-27 23:29:46,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:29:46,503 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:29:46,503 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:29:46,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:46,703 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:29:46,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:29:46,704 INFO L82 PathProgramCache]: Analyzing trace with hash -874436635, now seen corresponding path program 88 times [2019-12-27 23:29:46,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:29:46,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787527375] [2019-12-27 23:29:46,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:29:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:46,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787527375] [2019-12-27 23:29:46,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873169223] [2019-12-27 23:29:46,844 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:46,892 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:29:46,892 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:29:46,893 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:29:46,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:29:48,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:48,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:48,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:48,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:29:48,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:29:48,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1153065501] [2019-12-27 23:29:48,688 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:29:48,691 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:29:48,719 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 178 states and 306 transitions. [2019-12-27 23:29:48,719 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:29:48,722 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 29 times. [2019-12-27 23:29:48,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:29:48,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:29:48,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:29:48,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=300, Unknown=1, NotChecked=0, Total=380 [2019-12-27 23:29:48,722 INFO L87 Difference]: Start difference. First operand 2205 states and 5347 transitions. Second operand 12 states. [2019-12-27 23:29:49,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:29:49,403 INFO L93 Difference]: Finished difference Result 2961 states and 6867 transitions. [2019-12-27 23:29:49,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 23:29:49,403 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:29:49,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:29:49,406 INFO L225 Difference]: With dead ends: 2961 [2019-12-27 23:29:49,406 INFO L226 Difference]: Without dead ends: 2786 [2019-12-27 23:29:49,406 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=240, Invalid=815, Unknown=1, NotChecked=0, Total=1056 [2019-12-27 23:29:49,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2019-12-27 23:29:49,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2221. [2019-12-27 23:29:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2221 states. [2019-12-27 23:29:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 5383 transitions. [2019-12-27 23:29:49,427 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 5383 transitions. Word has length 48 [2019-12-27 23:29:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:29:49,427 INFO L462 AbstractCegarLoop]: Abstraction has 2221 states and 5383 transitions. [2019-12-27 23:29:49,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:29:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 5383 transitions. [2019-12-27 23:29:49,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:29:49,428 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:29:49,428 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:29:49,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:49,629 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:29:49,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:29:49,630 INFO L82 PathProgramCache]: Analyzing trace with hash -421315525, now seen corresponding path program 89 times [2019-12-27 23:29:49,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:29:49,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394585091] [2019-12-27 23:29:49,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:29:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:49,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394585091] [2019-12-27 23:29:49,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178926497] [2019-12-27 23:29:49,768 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:49,814 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 23:29:49,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:29:49,815 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:29:49,816 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:29:49,991 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:49,992 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:49,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:29:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:50,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:29:50,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:29:50,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2103444552] [2019-12-27 23:29:50,002 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:29:50,005 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:29:50,033 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 178 states and 306 transitions. [2019-12-27 23:29:50,033 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:29:50,036 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 30 times. [2019-12-27 23:29:50,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:29:50,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:29:50,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:29:50,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:29:50,037 INFO L87 Difference]: Start difference. First operand 2221 states and 5383 transitions. Second operand 12 states. [2019-12-27 23:29:50,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:29:50,509 INFO L93 Difference]: Finished difference Result 3173 states and 7366 transitions. [2019-12-27 23:29:50,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 23:29:50,509 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-12-27 23:29:50,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:29:50,512 INFO L225 Difference]: With dead ends: 3173 [2019-12-27 23:29:50,512 INFO L226 Difference]: Without dead ends: 2902 [2019-12-27 23:29:50,512 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 23:29:50,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2902 states. [2019-12-27 23:29:50,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2902 to 2205. [2019-12-27 23:29:50,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2205 states. [2019-12-27 23:29:50,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 5347 transitions. [2019-12-27 23:29:50,553 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 5347 transitions. Word has length 48 [2019-12-27 23:29:50,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:29:50,553 INFO L462 AbstractCegarLoop]: Abstraction has 2205 states and 5347 transitions. [2019-12-27 23:29:50,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:29:50,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 5347 transitions. [2019-12-27 23:29:50,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 23:29:50,555 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:29:50,555 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:29:50,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:50,755 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:29:50,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:29:50,756 INFO L82 PathProgramCache]: Analyzing trace with hash 821327845, now seen corresponding path program 90 times [2019-12-27 23:29:50,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:29:50,757 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916152160] [2019-12-27 23:29:50,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:29:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:29:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:29:50,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916152160] [2019-12-27 23:29:50,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823133846] [2019-12-27 23:29:50,897 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:29:50,948 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:29:50,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:29:50,950 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 23:29:50,951 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:30:02,199 WARN L192 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-27 23:30:02,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:30:02,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:30:02,202 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 23:30:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:30:02,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:30:02,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 23:30:02,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1598371699] [2019-12-27 23:30:02,211 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:30:02,214 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:30:02,244 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 166 states and 282 transitions. [2019-12-27 23:30:02,245 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:30:02,247 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 26 times. [2019-12-27 23:30:02,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:30:02,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:30:02,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:30:02,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=298, Unknown=2, NotChecked=0, Total=380 [2019-12-27 23:30:02,247 INFO L87 Difference]: Start difference. First operand 2205 states and 5347 transitions. Second operand 12 states. Received shutdown request... [2019-12-27 23:30:06,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 23:30:06,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:30:06,593 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-27 23:30:06,599 WARN L227 ceAbstractionStarter]: Timeout [2019-12-27 23:30:06,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 11:30:06 BasicIcfg [2019-12-27 23:30:06,600 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 23:30:06,601 INFO L168 Benchmark]: Toolchain (without parser) took 277442.85 ms. Allocated memory was 145.8 MB in the beginning and 391.6 MB in the end (delta: 245.9 MB). Free memory was 102.5 MB in the beginning and 158.4 MB in the end (delta: -55.9 MB). Peak memory consumption was 189.9 MB. Max. memory is 7.1 GB. [2019-12-27 23:30:06,601 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-12-27 23:30:06,601 INFO L168 Benchmark]: CACSL2BoogieTranslator took 648.20 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 102.2 MB in the beginning and 162.5 MB in the end (delta: -60.3 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2019-12-27 23:30:06,602 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.41 ms. Allocated memory is still 203.4 MB. Free memory was 162.5 MB in the beginning and 160.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-27 23:30:06,602 INFO L168 Benchmark]: Boogie Preprocessor took 25.81 ms. Allocated memory is still 203.4 MB. Free memory was 160.6 MB in the beginning and 159.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-12-27 23:30:06,602 INFO L168 Benchmark]: RCFGBuilder took 443.99 ms. Allocated memory is still 203.4 MB. Free memory was 159.3 MB in the beginning and 139.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2019-12-27 23:30:06,602 INFO L168 Benchmark]: TraceAbstraction took 276252.52 ms. Allocated memory was 203.4 MB in the beginning and 391.6 MB in the end (delta: 188.2 MB). Free memory was 139.4 MB in the beginning and 158.4 MB in the end (delta: -19.0 MB). Peak memory consumption was 169.2 MB. Max. memory is 7.1 GB. [2019-12-27 23:30:06,604 INFO L335 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 145.8 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 648.20 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 102.2 MB in the beginning and 162.5 MB in the end (delta: -60.3 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 67.41 ms. Allocated memory is still 203.4 MB. Free memory was 162.5 MB in the beginning and 160.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.81 ms. Allocated memory is still 203.4 MB. Free memory was 160.6 MB in the beginning and 159.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 443.99 ms. Allocated memory is still 203.4 MB. Free memory was 159.3 MB in the beginning and 139.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 276252.52 ms. Allocated memory was 203.4 MB in the beginning and 391.6 MB in the end (delta: 188.2 MB). Free memory was 139.4 MB in the beginning and 158.4 MB in the end (delta: -19.0 MB). Peak memory consumption was 169.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (2205states) and FLOYD_HOARE automaton (currently 5 states, 12 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 276.1s, OverallIterations: 117, TraceHistogramMax: 6, AutomataDifference: 112.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 6385 SDtfs, 48765 SDslu, 45350 SDs, 0 SdLazy, 7571 SolverSat, 3057 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8781 GetRequests, 5776 SyntacticMatches, 0 SemanticMatches, 3004 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 12444 ImplicationChecksByTransitivity, 219.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2226occurred in iteration=113, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.6s AutomataMinimizationTime, 116 MinimizatonAttempts, 62666 StatesRemovedByMinimization, 114 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 125.9s InterpolantComputationTime, 9984 NumberOfCodeBlocks, 9984 NumberOfCodeBlocksAsserted, 439 NumberOfCheckSat, 9753 ConstructedInterpolants, 202 QuantifiedInterpolants, 4754937 SizeOfPredicates, 470 NumberOfNonLiveVariables, 13203 ConjunctsInSsa, 1481 ConjunctsInUnsatCore, 231 InterpolantComputations, 5 PerfectInterpolantSequences, 154/3876 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown