/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe-MCR.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 15:07:06,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 15:07:06,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 15:07:06,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 15:07:06,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 15:07:06,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 15:07:06,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 15:07:06,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 15:07:06,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 15:07:06,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 15:07:06,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 15:07:06,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 15:07:06,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 15:07:06,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 15:07:06,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 15:07:06,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 15:07:06,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 15:07:06,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 15:07:06,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 15:07:06,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 15:07:06,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 15:07:06,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 15:07:06,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 15:07:06,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 15:07:06,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-27 15:07:06,125 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-27 15:07:06,125 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-27 15:07:06,126 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-27 15:07:06,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-27 15:07:06,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-27 15:07:06,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 15:07:06,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 15:07:06,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 15:07:06,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 15:07:06,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 15:07:06,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 15:07:06,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 15:07:06,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 15:07:06,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 15:07:06,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 15:07:06,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 15:07:06,140 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe-MCR.epf [2019-12-27 15:07:06,167 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 15:07:06,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 15:07:06,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 15:07:06,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 15:07:06,169 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 15:07:06,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 15:07:06,171 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 15:07:06,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 15:07:06,172 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 15:07:06,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 15:07:06,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 15:07:06,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 15:07:06,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 15:07:06,173 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 15:07:06,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 15:07:06,173 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 15:07:06,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 15:07:06,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 15:07:06,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 15:07:06,174 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 15:07:06,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 15:07:06,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 15:07:06,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 15:07:06,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 15:07:06,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 15:07:06,178 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 15:07:06,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 15:07:06,178 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2019-12-27 15:07:06,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 15:07:06,179 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2019-12-27 15:07:06,180 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 15:07:06,472 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 15:07:06,484 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 15:07:06,487 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 15:07:06,489 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 15:07:06,490 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 15:07:06,491 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2019-12-27 15:07:06,554 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2f87f945/f5b9a4417a0a4d0a894d27df5862502f/FLAG379d147c2 [2019-12-27 15:07:07,094 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 15:07:07,094 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2019-12-27 15:07:07,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2f87f945/f5b9a4417a0a4d0a894d27df5862502f/FLAG379d147c2 [2019-12-27 15:07:07,386 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2f87f945/f5b9a4417a0a4d0a894d27df5862502f [2019-12-27 15:07:07,394 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 15:07:07,396 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 15:07:07,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 15:07:07,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 15:07:07,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 15:07:07,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 03:07:07" (1/1) ... [2019-12-27 15:07:07,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@679bb618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:07, skipping insertion in model container [2019-12-27 15:07:07,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 03:07:07" (1/1) ... [2019-12-27 15:07:07,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 15:07:07,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 15:07:07,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 15:07:07,928 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 15:07:07,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 15:07:08,069 INFO L208 MainTranslator]: Completed translation [2019-12-27 15:07:08,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08 WrapperNode [2019-12-27 15:07:08,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 15:07:08,070 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 15:07:08,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 15:07:08,070 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 15:07:08,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,141 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 15:07:08,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 15:07:08,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 15:07:08,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 15:07:08,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 15:07:08,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 15:07:08,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 15:07:08,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 15:07:08,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (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 15:07:08,222 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 15:07:08,222 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 15:07:08,222 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 15:07:08,222 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 15:07:08,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 15:07:08,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 15:07:08,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 15:07:08,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 15:07:08,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 15:07:08,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 15:07:08,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 15:07:08,225 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 15:07:08,591 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 15:07:08,591 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 15:07:08,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 03:07:08 BoogieIcfgContainer [2019-12-27 15:07:08,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 15:07:08,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 15:07:08,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 15:07:08,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 15:07:08,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 03:07:07" (1/3) ... [2019-12-27 15:07:08,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f04b776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 03:07:08, skipping insertion in model container [2019-12-27 15:07:08,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (2/3) ... [2019-12-27 15:07:08,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f04b776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 03:07:08, skipping insertion in model container [2019-12-27 15:07:08,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 03:07:08" (3/3) ... [2019-12-27 15:07:08,601 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2019-12-27 15:07:08,612 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 15:07:08,612 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 15:07:08,620 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 15:07:08,621 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 15:07:08,648 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,648 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,648 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,649 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,649 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,650 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,650 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,650 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,652 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,652 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,653 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,653 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,653 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,653 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,654 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,654 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,654 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,654 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,655 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,655 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,655 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,655 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,655 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,656 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,656 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,657 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,657 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,657 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,657 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,658 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,665 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,666 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,666 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,666 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,666 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,667 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,683 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,683 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,683 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,684 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,684 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,684 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,703 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 15:07:08,723 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 15:07:08,723 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 15:07:08,723 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 15:07:08,724 INFO L376 AbstractCegarLoop]: Backedges is MCR [2019-12-27 15:07:08,724 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 15:07:08,724 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 15:07:08,724 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 15:07:08,724 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 15:07:08,738 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-27 15:07:08,741 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 15:07:08,780 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 15:07:08,780 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 15:07:08,786 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 15:07:08,790 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 15:07:08,807 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 15:07:08,808 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 15:07:08,809 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 15:07:08,812 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-27 15:07:08,813 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-27 15:07:10,075 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-27 15:07:10,201 INFO L206 etLargeBlockEncoding]: Checked pairs total: 686 [2019-12-27 15:07:10,201 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-27 15:07:10,205 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-27 15:07:10,213 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-27 15:07:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-27 15:07:10,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-27 15:07:10,222 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:10,223 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-27 15:07:10,223 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:10,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:10,230 INFO L82 PathProgramCache]: Analyzing trace with hash 214338580, now seen corresponding path program 1 times [2019-12-27 15:07:10,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:10,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259844211] [2019-12-27 15:07:10,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:10,453 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 15:07:10,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259844211] [2019-12-27 15:07:10,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:10,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-27 15:07:10,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1555038891] [2019-12-27 15:07:10,457 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:10,462 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:10,475 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 6 states and 5 transitions. [2019-12-27 15:07:10,475 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:10,479 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:10,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 15:07:10,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:10,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 15:07:10,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 15:07:10,497 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-27 15:07:10,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:10,533 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-27 15:07:10,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 15:07:10,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-27 15:07:10,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:10,546 INFO L225 Difference]: With dead ends: 54 [2019-12-27 15:07:10,547 INFO L226 Difference]: Without dead ends: 36 [2019-12-27 15:07:10,550 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 15:07:10,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-27 15:07:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-27 15:07:10,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 15:07:10,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-27 15:07:10,588 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-27 15:07:10,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:10,588 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-27 15:07:10,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 15:07:10,589 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-27 15:07:10,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 15:07:10,589 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:10,590 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:10,590 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:10,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:10,590 INFO L82 PathProgramCache]: Analyzing trace with hash -179042095, now seen corresponding path program 1 times [2019-12-27 15:07:10,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:10,591 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211972082] [2019-12-27 15:07:10,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:10,680 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 15:07:10,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211972082] [2019-12-27 15:07:10,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:10,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 15:07:10,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [584596888] [2019-12-27 15:07:10,681 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:10,682 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:10,685 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 8 states and 7 transitions. [2019-12-27 15:07:10,685 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:10,685 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:10,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 15:07:10,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:10,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 15:07:10,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:07:10,688 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-27 15:07:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:10,709 INFO L93 Difference]: Finished difference Result 42 states and 90 transitions. [2019-12-27 15:07:10,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 15:07:10,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 15:07:10,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:10,711 INFO L225 Difference]: With dead ends: 42 [2019-12-27 15:07:10,711 INFO L226 Difference]: Without dead ends: 41 [2019-12-27 15:07:10,712 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:07:10,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-27 15:07:10,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-12-27 15:07:10,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-27 15:07:10,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 86 transitions. [2019-12-27 15:07:10,720 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 86 transitions. Word has length 7 [2019-12-27 15:07:10,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:10,720 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 86 transitions. [2019-12-27 15:07:10,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 15:07:10,720 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 86 transitions. [2019-12-27 15:07:10,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 15:07:10,721 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:10,721 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:10,721 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:10,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:10,722 INFO L82 PathProgramCache]: Analyzing trace with hash -179038096, now seen corresponding path program 1 times [2019-12-27 15:07:10,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:10,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863395239] [2019-12-27 15:07:10,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:10,785 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 15:07:10,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863395239] [2019-12-27 15:07:10,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:10,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 15:07:10,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [433267243] [2019-12-27 15:07:10,786 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:10,787 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:10,789 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 15 transitions. [2019-12-27 15:07:10,789 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:10,793 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:07:10,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 15:07:10,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:10,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 15:07:10,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:07:10,794 INFO L87 Difference]: Start difference. First operand 39 states and 86 transitions. Second operand 4 states. [2019-12-27 15:07:10,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:10,808 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-27 15:07:10,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 15:07:10,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 15:07:10,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:10,810 INFO L225 Difference]: With dead ends: 51 [2019-12-27 15:07:10,810 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 15:07:10,811 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:07:10,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 15:07:10,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-27 15:07:10,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-27 15:07:10,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-27 15:07:10,818 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-27 15:07:10,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:10,819 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-27 15:07:10,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 15:07:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-27 15:07:10,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 15:07:10,820 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:10,820 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:10,820 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:10,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:10,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1255337161, now seen corresponding path program 2 times [2019-12-27 15:07:10,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:10,821 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402916528] [2019-12-27 15:07:10,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:10,891 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 15:07:10,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402916528] [2019-12-27 15:07:10,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985078544] [2019-12-27 15:07:10,892 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:10,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:10,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:10,974 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:07:10,978 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:11,034 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 15:07:11,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:11,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 15:07:11,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [516249036] [2019-12-27 15:07:11,037 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:11,038 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:11,039 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 9 states and 8 transitions. [2019-12-27 15:07:11,039 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:11,039 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:11,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:11,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:11,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:11,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:07:11,042 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 5 states. [2019-12-27 15:07:11,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:11,065 INFO L93 Difference]: Finished difference Result 56 states and 118 transitions. [2019-12-27 15:07:11,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:11,069 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-27 15:07:11,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:11,070 INFO L225 Difference]: With dead ends: 56 [2019-12-27 15:07:11,070 INFO L226 Difference]: Without dead ends: 55 [2019-12-27 15:07:11,070 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:07:11,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-27 15:07:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-12-27 15:07:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 15:07:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 108 transitions. [2019-12-27 15:07:11,078 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 108 transitions. Word has length 8 [2019-12-27 15:07:11,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:11,079 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 108 transitions. [2019-12-27 15:07:11,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:11,079 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 108 transitions. [2019-12-27 15:07:11,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 15:07:11,080 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:11,080 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:11,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:11,283 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:11,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:11,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1255213037, now seen corresponding path program 2 times [2019-12-27 15:07:11,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:11,285 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672626429] [2019-12-27 15:07:11,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:11,397 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 15:07:11,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672626429] [2019-12-27 15:07:11,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554067033] [2019-12-27 15:07:11,398 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:07:11,456 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:11,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:11,457 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:07:11,458 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:11,505 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 15:07:11,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:11,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 15:07:11,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1757810145] [2019-12-27 15:07:11,507 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:11,508 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:11,509 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 20 transitions. [2019-12-27 15:07:11,510 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:11,513 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 15:07:11,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:11,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:11,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:11,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:07:11,516 INFO L87 Difference]: Start difference. First operand 50 states and 108 transitions. Second operand 5 states. [2019-12-27 15:07:11,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:11,555 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2019-12-27 15:07:11,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:11,558 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-27 15:07:11,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:11,559 INFO L225 Difference]: With dead ends: 63 [2019-12-27 15:07:11,559 INFO L226 Difference]: Without dead ends: 62 [2019-12-27 15:07:11,560 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-12-27 15:07:11,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-27 15:07:11,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-12-27 15:07:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 15:07:11,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-27 15:07:11,568 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-27 15:07:11,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:11,569 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-27 15:07:11,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:11,569 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-27 15:07:11,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:11,570 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:11,570 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:11,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:11,781 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:11,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:11,781 INFO L82 PathProgramCache]: Analyzing trace with hash -260745839, now seen corresponding path program 3 times [2019-12-27 15:07:11,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:11,783 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299349122] [2019-12-27 15:07:11,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:11,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299349122] [2019-12-27 15:07:11,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715673239] [2019-12-27 15:07:11,902 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 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 15:07:11,963 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:11,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:11,965 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:11,967 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:12,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:12,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:12,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [630594922] [2019-12-27 15:07:12,031 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:12,032 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:12,045 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 10 states and 9 transitions. [2019-12-27 15:07:12,045 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:12,045 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:12,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:12,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:12,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:12,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:12,048 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 6 states. [2019-12-27 15:07:12,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:12,069 INFO L93 Difference]: Finished difference Result 66 states and 142 transitions. [2019-12-27 15:07:12,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:12,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-12-27 15:07:12,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:12,070 INFO L225 Difference]: With dead ends: 66 [2019-12-27 15:07:12,070 INFO L226 Difference]: Without dead ends: 65 [2019-12-27 15:07:12,071 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:12,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-27 15:07:12,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-12-27 15:07:12,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-27 15:07:12,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2019-12-27 15:07:12,078 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 9 [2019-12-27 15:07:12,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:12,078 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2019-12-27 15:07:12,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:12,079 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2019-12-27 15:07:12,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:12,080 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:12,080 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:12,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:12,288 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:12,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:12,289 INFO L82 PathProgramCache]: Analyzing trace with hash -260744723, now seen corresponding path program 1 times [2019-12-27 15:07:12,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:12,290 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837462099] [2019-12-27 15:07:12,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:12,351 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 15:07:12,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837462099] [2019-12-27 15:07:12,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:12,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 15:07:12,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1473540483] [2019-12-27 15:07:12,353 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:12,353 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:12,355 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 17 transitions. [2019-12-27 15:07:12,355 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:12,355 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:12,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:12,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:12,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:12,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:07:12,357 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand 5 states. [2019-12-27 15:07:12,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:12,377 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-27 15:07:12,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:12,378 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 15:07:12,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:12,379 INFO L225 Difference]: With dead ends: 68 [2019-12-27 15:07:12,379 INFO L226 Difference]: Without dead ends: 67 [2019-12-27 15:07:12,380 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:07:12,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-27 15:07:12,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-12-27 15:07:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-27 15:07:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2019-12-27 15:07:12,386 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 9 [2019-12-27 15:07:12,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:12,387 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2019-12-27 15:07:12,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:12,388 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2019-12-27 15:07:12,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:12,389 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:12,389 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:12,389 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:12,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:12,389 INFO L82 PathProgramCache]: Analyzing trace with hash -260711243, now seen corresponding path program 2 times [2019-12-27 15:07:12,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:12,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135635204] [2019-12-27 15:07:12,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:12,448 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 15:07:12,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135635204] [2019-12-27 15:07:12,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:12,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 15:07:12,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1125816230] [2019-12-27 15:07:12,449 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:12,450 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:12,452 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 21 transitions. [2019-12-27 15:07:12,452 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:12,454 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:12,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:12,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:12,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:12,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:07:12,456 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand 5 states. [2019-12-27 15:07:12,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:12,503 INFO L93 Difference]: Finished difference Result 69 states and 145 transitions. [2019-12-27 15:07:12,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:12,504 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 15:07:12,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:12,505 INFO L225 Difference]: With dead ends: 69 [2019-12-27 15:07:12,505 INFO L226 Difference]: Without dead ends: 68 [2019-12-27 15:07:12,505 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-12-27 15:07:12,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-27 15:07:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2019-12-27 15:07:12,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-27 15:07:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 134 transitions. [2019-12-27 15:07:12,516 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 134 transitions. Word has length 9 [2019-12-27 15:07:12,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:12,516 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 134 transitions. [2019-12-27 15:07:12,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 134 transitions. [2019-12-27 15:07:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:12,522 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:12,522 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:12,523 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:12,523 INFO L82 PathProgramCache]: Analyzing trace with hash -256897840, now seen corresponding path program 3 times [2019-12-27 15:07:12,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:12,524 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517227556] [2019-12-27 15:07:12,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:12,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517227556] [2019-12-27 15:07:12,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402336116] [2019-12-27 15:07:12,596 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 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 15:07:12,658 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:12,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:12,659 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:12,661 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:12,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:12,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:12,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [392749373] [2019-12-27 15:07:12,713 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:12,714 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:12,715 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 25 transitions. [2019-12-27 15:07:12,716 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:12,719 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:12,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:12,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:12,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:12,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:12,720 INFO L87 Difference]: Start difference. First operand 62 states and 134 transitions. Second operand 6 states. [2019-12-27 15:07:12,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:12,782 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2019-12-27 15:07:12,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:12,782 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-12-27 15:07:12,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:12,783 INFO L225 Difference]: With dead ends: 77 [2019-12-27 15:07:12,783 INFO L226 Difference]: Without dead ends: 76 [2019-12-27 15:07:12,784 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:12,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-27 15:07:12,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-27 15:07:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 15:07:12,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-27 15:07:12,799 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-27 15:07:12,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:12,799 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-27 15:07:12,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-27 15:07:12,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:12,801 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:12,801 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:13,005 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:13,006 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:13,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:13,006 INFO L82 PathProgramCache]: Analyzing trace with hash 506814071, now seen corresponding path program 4 times [2019-12-27 15:07:13,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:13,008 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516413006] [2019-12-27 15:07:13,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:13,083 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 15:07:13,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516413006] [2019-12-27 15:07:13,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469561426] [2019-12-27 15:07:13,084 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 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 15:07:13,136 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:13,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:13,137 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:13,138 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:13,209 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 15:07:13,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:13,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:13,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1675821681] [2019-12-27 15:07:13,211 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:13,211 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:13,213 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 11 states and 10 transitions. [2019-12-27 15:07:13,213 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:13,213 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:13,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:13,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:13,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:13,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:13,214 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 7 states. [2019-12-27 15:07:13,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:13,236 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2019-12-27 15:07:13,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:13,237 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-27 15:07:13,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:13,238 INFO L225 Difference]: With dead ends: 80 [2019-12-27 15:07:13,238 INFO L226 Difference]: Without dead ends: 79 [2019-12-27 15:07:13,238 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:13,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-27 15:07:13,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-12-27 15:07:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 15:07:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-27 15:07:13,244 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-27 15:07:13,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:13,245 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-27 15:07:13,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:13,245 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-27 15:07:13,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:13,246 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:13,246 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:13,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:13,450 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:13,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:13,450 INFO L82 PathProgramCache]: Analyzing trace with hash 506815187, now seen corresponding path program 3 times [2019-12-27 15:07:13,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:13,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348979475] [2019-12-27 15:07:13,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:13,516 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 15:07:13,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348979475] [2019-12-27 15:07:13,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791759226] [2019-12-27 15:07:13,516 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:07:13,579 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:13,579 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:13,580 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:13,580 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:13,637 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 15:07:13,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:13,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:13,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1880516604] [2019-12-27 15:07:13,638 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:13,639 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:13,641 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 20 transitions. [2019-12-27 15:07:13,641 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:13,641 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:13,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:13,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:13,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:13,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:13,642 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 6 states. [2019-12-27 15:07:13,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:13,664 INFO L93 Difference]: Finished difference Result 81 states and 174 transitions. [2019-12-27 15:07:13,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:13,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:13,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:13,667 INFO L225 Difference]: With dead ends: 81 [2019-12-27 15:07:13,667 INFO L226 Difference]: Without dead ends: 80 [2019-12-27 15:07:13,667 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:13,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-27 15:07:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2019-12-27 15:07:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 15:07:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-27 15:07:13,673 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-27 15:07:13,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:13,673 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-27 15:07:13,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:13,673 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-27 15:07:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:13,674 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:13,674 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:13,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:13,885 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:13,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:13,886 INFO L82 PathProgramCache]: Analyzing trace with hash 506848822, now seen corresponding path program 4 times [2019-12-27 15:07:13,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:13,887 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803210477] [2019-12-27 15:07:13,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:13,949 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 15:07:13,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803210477] [2019-12-27 15:07:13,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760918659] [2019-12-27 15:07:13,950 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 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 15:07:13,992 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:13,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:13,993 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:13,994 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:14,037 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 15:07:14,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:14,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:14,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [200889042] [2019-12-27 15:07:14,038 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:14,039 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:14,040 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 18 transitions. [2019-12-27 15:07:14,040 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:14,041 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:14,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:14,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:14,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:14,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:14,042 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 6 states. [2019-12-27 15:07:14,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:14,078 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2019-12-27 15:07:14,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:14,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:14,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:14,079 INFO L225 Difference]: With dead ends: 85 [2019-12-27 15:07:14,079 INFO L226 Difference]: Without dead ends: 84 [2019-12-27 15:07:14,080 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-12-27 15:07:14,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-27 15:07:14,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2019-12-27 15:07:14,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-27 15:07:14,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-27 15:07:14,086 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-27 15:07:14,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:14,086 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-27 15:07:14,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:14,086 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-27 15:07:14,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:14,087 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:14,087 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:14,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:14,291 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:14,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:14,292 INFO L82 PathProgramCache]: Analyzing trace with hash 506848667, now seen corresponding path program 5 times [2019-12-27 15:07:14,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:14,292 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436550858] [2019-12-27 15:07:14,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:14,351 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 15:07:14,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436550858] [2019-12-27 15:07:14,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167286130] [2019-12-27 15:07:14,352 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 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 15:07:14,408 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:14,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:14,409 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:14,410 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:14,486 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 15:07:14,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:14,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:14,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1108786102] [2019-12-27 15:07:14,487 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:14,488 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:14,490 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 18 transitions. [2019-12-27 15:07:14,490 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:14,491 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:14,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:14,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:14,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:14,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:14,492 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 6 states. [2019-12-27 15:07:14,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:14,533 INFO L93 Difference]: Finished difference Result 84 states and 180 transitions. [2019-12-27 15:07:14,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:14,534 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:14,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:14,535 INFO L225 Difference]: With dead ends: 84 [2019-12-27 15:07:14,535 INFO L226 Difference]: Without dead ends: 83 [2019-12-27 15:07:14,536 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-12-27 15:07:14,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-27 15:07:14,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2019-12-27 15:07:14,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 15:07:14,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-27 15:07:14,540 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-27 15:07:14,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:14,540 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-27 15:07:14,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-27 15:07:14,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:14,541 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:14,541 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:14,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:14,745 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:14,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:14,746 INFO L82 PathProgramCache]: Analyzing trace with hash 507891352, now seen corresponding path program 6 times [2019-12-27 15:07:14,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:14,746 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848610322] [2019-12-27 15:07:14,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:14,816 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 15:07:14,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848610322] [2019-12-27 15:07:14,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297898017] [2019-12-27 15:07:14,817 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 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 15:07:14,870 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:14,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:14,871 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:14,872 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:14,912 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 15:07:14,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:14,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:14,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [250022612] [2019-12-27 15:07:14,914 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:14,915 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:14,917 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 28 transitions. [2019-12-27 15:07:14,917 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:14,921 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:14,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:14,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:14,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:14,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:14,922 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 6 states. [2019-12-27 15:07:14,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:14,992 INFO L93 Difference]: Finished difference Result 87 states and 183 transitions. [2019-12-27 15:07:14,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:14,993 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:14,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:14,994 INFO L225 Difference]: With dead ends: 87 [2019-12-27 15:07:14,994 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 15:07:14,994 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:14,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 15:07:14,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2019-12-27 15:07:14,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-27 15:07:14,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-27 15:07:14,999 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-27 15:07:14,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:14,999 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-27 15:07:15,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:15,000 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-27 15:07:15,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:15,001 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:15,001 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:15,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:15,210 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:15,210 INFO L82 PathProgramCache]: Analyzing trace with hash 507886702, now seen corresponding path program 7 times [2019-12-27 15:07:15,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:15,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491749869] [2019-12-27 15:07:15,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:15,270 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 15:07:15,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491749869] [2019-12-27 15:07:15,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276107115] [2019-12-27 15:07:15,271 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 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 15:07:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:15,327 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:15,328 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:15,395 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 15:07:15,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:15,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:15,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1589425468] [2019-12-27 15:07:15,396 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:15,397 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:15,400 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 22 transitions. [2019-12-27 15:07:15,400 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:15,404 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:15,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:15,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:15,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:15,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:15,405 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 6 states. [2019-12-27 15:07:15,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:15,472 INFO L93 Difference]: Finished difference Result 87 states and 183 transitions. [2019-12-27 15:07:15,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:15,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:15,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:15,474 INFO L225 Difference]: With dead ends: 87 [2019-12-27 15:07:15,474 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 15:07:15,475 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:15,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 15:07:15,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2019-12-27 15:07:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 15:07:15,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-27 15:07:15,479 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-27 15:07:15,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:15,479 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-27 15:07:15,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:15,479 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-27 15:07:15,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:15,480 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:15,480 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:15,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:15,688 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:15,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:15,688 INFO L82 PathProgramCache]: Analyzing trace with hash 507886547, now seen corresponding path program 8 times [2019-12-27 15:07:15,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:15,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31376128] [2019-12-27 15:07:15,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:15,761 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 15:07:15,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31376128] [2019-12-27 15:07:15,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753298347] [2019-12-27 15:07:15,763 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 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 15:07:15,837 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:15,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:15,838 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:15,841 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:15,908 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 15:07:15,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:15,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:15,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [856487514] [2019-12-27 15:07:15,911 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:15,912 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:15,915 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 22 transitions. [2019-12-27 15:07:15,917 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:15,921 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:15,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:15,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:15,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:15,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:15,923 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 6 states. [2019-12-27 15:07:15,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:15,994 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2019-12-27 15:07:15,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:15,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:15,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:15,999 INFO L225 Difference]: With dead ends: 85 [2019-12-27 15:07:15,999 INFO L226 Difference]: Without dead ends: 84 [2019-12-27 15:07:15,999 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:16,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-27 15:07:16,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2019-12-27 15:07:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 15:07:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-27 15:07:16,005 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-27 15:07:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:16,006 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-27 15:07:16,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-27 15:07:16,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:16,006 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:16,006 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:16,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:16,211 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:16,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:16,212 INFO L82 PathProgramCache]: Analyzing trace with hash 626102195, now seen corresponding path program 4 times [2019-12-27 15:07:16,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:16,213 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134434443] [2019-12-27 15:07:16,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:16,327 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 15:07:16,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134434443] [2019-12-27 15:07:16,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394329710] [2019-12-27 15:07:16,328 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 15:07:16,396 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:16,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:16,397 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:16,399 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:16,461 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 15:07:16,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:16,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:16,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1734466437] [2019-12-27 15:07:16,462 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:16,463 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:16,465 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 30 transitions. [2019-12-27 15:07:16,465 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:16,470 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 15:07:16,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:16,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:16,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:16,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:16,473 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 7 states. [2019-12-27 15:07:16,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:16,556 INFO L93 Difference]: Finished difference Result 92 states and 194 transitions. [2019-12-27 15:07:16,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:16,557 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-27 15:07:16,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:16,558 INFO L225 Difference]: With dead ends: 92 [2019-12-27 15:07:16,558 INFO L226 Difference]: Without dead ends: 91 [2019-12-27 15:07:16,559 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:16,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-27 15:07:16,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2019-12-27 15:07:16,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 15:07:16,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-27 15:07:16,563 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-27 15:07:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:16,564 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-27 15:07:16,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:16,564 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-27 15:07:16,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:16,564 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:16,565 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:16,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:16,771 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:16,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:16,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1468632495, now seen corresponding path program 5 times [2019-12-27 15:07:16,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:16,772 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657756949] [2019-12-27 15:07:16,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:16,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657756949] [2019-12-27 15:07:16,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232274622] [2019-12-27 15:07:16,884 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 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 15:07:16,948 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:16,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:16,949 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:16,951 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:17,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:17,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:17,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1854876643] [2019-12-27 15:07:17,054 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:17,054 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:17,055 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 11 transitions. [2019-12-27 15:07:17,056 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:17,056 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:17,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:17,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:17,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:17,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:17,058 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 8 states. [2019-12-27 15:07:17,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:17,085 INFO L93 Difference]: Finished difference Result 95 states and 202 transitions. [2019-12-27 15:07:17,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:17,086 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-27 15:07:17,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:17,086 INFO L225 Difference]: With dead ends: 95 [2019-12-27 15:07:17,087 INFO L226 Difference]: Without dead ends: 94 [2019-12-27 15:07:17,087 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:17,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-27 15:07:17,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-12-27 15:07:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:17,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 15:07:17,091 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 15:07:17,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:17,091 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 15:07:17,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:17,091 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 15:07:17,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:17,092 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:17,092 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:17,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:17,293 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:17,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:17,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1468631379, now seen corresponding path program 9 times [2019-12-27 15:07:17,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:17,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650386558] [2019-12-27 15:07:17,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:17,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650386558] [2019-12-27 15:07:17,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826698629] [2019-12-27 15:07:17,362 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:07:17,419 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:17,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:17,420 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:17,423 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:17,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:17,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:17,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1404702702] [2019-12-27 15:07:17,491 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:17,492 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:17,493 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:17,494 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:17,494 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:17,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:17,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:17,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:17,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:17,495 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 7 states. [2019-12-27 15:07:17,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:17,516 INFO L93 Difference]: Finished difference Result 98 states and 211 transitions. [2019-12-27 15:07:17,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:17,517 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:17,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:17,517 INFO L225 Difference]: With dead ends: 98 [2019-12-27 15:07:17,518 INFO L226 Difference]: Without dead ends: 97 [2019-12-27 15:07:17,518 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:17,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-27 15:07:17,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2019-12-27 15:07:17,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 15:07:17,522 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 15:07:17,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:17,522 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 15:07:17,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:17,522 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 15:07:17,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:17,523 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:17,523 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:17,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:17,724 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:17,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:17,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597744, now seen corresponding path program 10 times [2019-12-27 15:07:17,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:17,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628614828] [2019-12-27 15:07:17,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:17,781 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 15:07:17,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628614828] [2019-12-27 15:07:17,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842585603] [2019-12-27 15:07:17,782 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 15:07:17,827 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:17,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:17,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:17,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:17,900 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 15:07:17,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:17,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:17,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [797814653] [2019-12-27 15:07:17,901 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:17,901 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:17,903 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 21 transitions. [2019-12-27 15:07:17,903 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:17,903 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:17,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:17,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:17,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:17,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:17,905 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 7 states. [2019-12-27 15:07:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:17,946 INFO L93 Difference]: Finished difference Result 101 states and 217 transitions. [2019-12-27 15:07:17,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:17,946 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:17,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:17,947 INFO L225 Difference]: With dead ends: 101 [2019-12-27 15:07:17,947 INFO L226 Difference]: Without dead ends: 100 [2019-12-27 15:07:17,948 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:07:17,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-27 15:07:17,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2019-12-27 15:07:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:17,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 15:07:17,951 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 15:07:17,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:17,952 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 15:07:17,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:17,952 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 15:07:17,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:17,953 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:17,953 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:18,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:18,154 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:18,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597899, now seen corresponding path program 11 times [2019-12-27 15:07:18,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:18,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568708827] [2019-12-27 15:07:18,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:18,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568708827] [2019-12-27 15:07:18,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218349527] [2019-12-27 15:07:18,213 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:18,259 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:18,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:18,260 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:18,261 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:18,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:18,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:18,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [82764819] [2019-12-27 15:07:18,404 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:18,405 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:18,408 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 21 transitions. [2019-12-27 15:07:18,409 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:18,409 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:18,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:18,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:18,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:18,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:18,410 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 7 states. [2019-12-27 15:07:18,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:18,459 INFO L93 Difference]: Finished difference Result 101 states and 217 transitions. [2019-12-27 15:07:18,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:18,460 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:18,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:18,461 INFO L225 Difference]: With dead ends: 101 [2019-12-27 15:07:18,461 INFO L226 Difference]: Without dead ends: 100 [2019-12-27 15:07:18,461 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:07:18,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-27 15:07:18,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2019-12-27 15:07:18,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 15:07:18,468 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 15:07:18,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:18,468 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 15:07:18,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:18,468 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 15:07:18,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:18,469 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:18,469 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:18,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:18,670 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:18,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:18,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555059, now seen corresponding path program 12 times [2019-12-27 15:07:18,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:18,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18312667] [2019-12-27 15:07:18,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:18,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18312667] [2019-12-27 15:07:18,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286154238] [2019-12-27 15:07:18,728 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:18,773 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:18,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:18,774 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:18,774 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:18,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:18,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:18,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1564568006] [2019-12-27 15:07:18,839 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:18,840 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:18,841 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:18,841 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:18,842 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:18,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:18,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:18,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:18,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:18,843 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 7 states. [2019-12-27 15:07:18,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:18,913 INFO L93 Difference]: Finished difference Result 103 states and 216 transitions. [2019-12-27 15:07:18,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:18,913 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:18,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:18,914 INFO L225 Difference]: With dead ends: 103 [2019-12-27 15:07:18,914 INFO L226 Difference]: Without dead ends: 102 [2019-12-27 15:07:18,915 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:18,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-27 15:07:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2019-12-27 15:07:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 15:07:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 15:07:18,919 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 15:07:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:18,920 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 15:07:18,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 15:07:18,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:18,921 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:18,921 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:19,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:19,131 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:19,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:19,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555214, now seen corresponding path program 13 times [2019-12-27 15:07:19,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:19,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556564081] [2019-12-27 15:07:19,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:19,204 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 15:07:19,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556564081] [2019-12-27 15:07:19,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121841] [2019-12-27 15:07:19,204 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:19,255 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:19,256 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:19,321 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 15:07:19,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:19,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:19,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [394984092] [2019-12-27 15:07:19,323 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:19,324 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:19,325 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:19,325 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:19,325 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:19,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:19,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:19,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:19,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:19,326 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 7 states. [2019-12-27 15:07:19,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:19,422 INFO L93 Difference]: Finished difference Result 103 states and 222 transitions. [2019-12-27 15:07:19,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:19,422 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:19,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:19,423 INFO L225 Difference]: With dead ends: 103 [2019-12-27 15:07:19,423 INFO L226 Difference]: Without dead ends: 102 [2019-12-27 15:07:19,424 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:19,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-27 15:07:19,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2019-12-27 15:07:19,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:19,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:19,428 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:19,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:19,428 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:19,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:19,428 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:19,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:19,429 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:19,429 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:19,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:19,632 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:19,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:19,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1467559864, now seen corresponding path program 14 times [2019-12-27 15:07:19,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:19,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712225194] [2019-12-27 15:07:19,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:19,708 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 15:07:19,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712225194] [2019-12-27 15:07:19,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473555785] [2019-12-27 15:07:19,709 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:19,767 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:19,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:19,769 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:19,771 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:19,847 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 15:07:19,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:19,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:19,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1660458805] [2019-12-27 15:07:19,849 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:19,850 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:19,852 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:19,853 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:19,854 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:19,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:19,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:19,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:19,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:19,856 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:19,929 INFO L93 Difference]: Finished difference Result 104 states and 223 transitions. [2019-12-27 15:07:19,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:19,930 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:19,931 INFO L225 Difference]: With dead ends: 104 [2019-12-27 15:07:19,931 INFO L226 Difference]: Without dead ends: 103 [2019-12-27 15:07:19,932 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:19,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-27 15:07:19,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2019-12-27 15:07:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:19,935 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:19,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:19,935 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:19,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:19,936 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:19,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:19,938 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:19,938 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:20,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:20,142 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:20,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:20,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1467560019, now seen corresponding path program 15 times [2019-12-27 15:07:20,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:20,143 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851544104] [2019-12-27 15:07:20,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:20,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851544104] [2019-12-27 15:07:20,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140754488] [2019-12-27 15:07:20,231 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:20,300 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:20,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:20,301 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:20,302 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:20,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:20,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:20,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1307654446] [2019-12-27 15:07:20,372 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:20,372 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:20,374 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:20,374 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:20,375 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:20,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:20,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:20,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:20,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:20,376 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:20,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:20,437 INFO L93 Difference]: Finished difference Result 103 states and 222 transitions. [2019-12-27 15:07:20,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:20,437 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:20,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:20,438 INFO L225 Difference]: With dead ends: 103 [2019-12-27 15:07:20,438 INFO L226 Difference]: Without dead ends: 102 [2019-12-27 15:07:20,439 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:20,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-27 15:07:20,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2019-12-27 15:07:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:20,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:20,442 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:20,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:20,442 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:20,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:20,442 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:20,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:20,443 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:20,443 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:20,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:20,645 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:20,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:20,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1435231979, now seen corresponding path program 16 times [2019-12-27 15:07:20,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:20,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779908395] [2019-12-27 15:07:20,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:20,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779908395] [2019-12-27 15:07:20,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088073675] [2019-12-27 15:07:20,718 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:20,762 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:20,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:20,762 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:20,769 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:20,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:20,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:20,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [513660440] [2019-12-27 15:07:20,840 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:20,841 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:20,843 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 35 transitions. [2019-12-27 15:07:20,843 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:20,846 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:07:20,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:20,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:20,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:20,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:20,847 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:20,915 INFO L93 Difference]: Finished difference Result 106 states and 222 transitions. [2019-12-27 15:07:20,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:20,916 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:20,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:20,917 INFO L225 Difference]: With dead ends: 106 [2019-12-27 15:07:20,917 INFO L226 Difference]: Without dead ends: 105 [2019-12-27 15:07:20,917 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:07:20,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-27 15:07:20,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2019-12-27 15:07:20,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 15:07:20,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 15:07:20,921 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 15:07:20,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:20,921 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 15:07:20,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:20,921 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 15:07:20,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:20,922 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:20,922 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:21,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:21,125 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:21,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:21,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236629, now seen corresponding path program 17 times [2019-12-27 15:07:21,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:21,127 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188115645] [2019-12-27 15:07:21,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:21,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188115645] [2019-12-27 15:07:21,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600509258] [2019-12-27 15:07:21,189 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:21,235 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:21,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:21,236 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:21,237 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:21,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:21,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:21,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1057810982] [2019-12-27 15:07:21,306 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:21,307 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:21,308 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 29 transitions. [2019-12-27 15:07:21,309 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:21,311 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:21,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:21,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:21,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:21,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:21,312 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 7 states. [2019-12-27 15:07:21,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:21,427 INFO L93 Difference]: Finished difference Result 109 states and 228 transitions. [2019-12-27 15:07:21,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:21,428 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:21,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:21,428 INFO L225 Difference]: With dead ends: 109 [2019-12-27 15:07:21,429 INFO L226 Difference]: Without dead ends: 108 [2019-12-27 15:07:21,429 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:21,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-27 15:07:21,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2019-12-27 15:07:21,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:21,432 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:21,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:21,432 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:21,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:21,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:21,433 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:21,433 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:21,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:21,637 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:21,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:21,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236784, now seen corresponding path program 18 times [2019-12-27 15:07:21,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:21,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617070153] [2019-12-27 15:07:21,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:21,694 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 15:07:21,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617070153] [2019-12-27 15:07:21,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730111979] [2019-12-27 15:07:21,694 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:21,738 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:21,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:21,739 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:21,739 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:21,819 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 15:07:21,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:21,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:21,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1846421995] [2019-12-27 15:07:21,820 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:21,821 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:21,822 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 29 transitions. [2019-12-27 15:07:21,823 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:21,825 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:21,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:21,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:21,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:21,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:21,826 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:21,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:21,907 INFO L93 Difference]: Finished difference Result 106 states and 222 transitions. [2019-12-27 15:07:21,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:21,908 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:21,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:21,909 INFO L225 Difference]: With dead ends: 106 [2019-12-27 15:07:21,909 INFO L226 Difference]: Without dead ends: 105 [2019-12-27 15:07:21,909 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:21,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-27 15:07:21,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2019-12-27 15:07:21,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:21,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 183 transitions. [2019-12-27 15:07:21,913 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 183 transitions. Word has length 11 [2019-12-27 15:07:21,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:21,913 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 183 transitions. [2019-12-27 15:07:21,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 183 transitions. [2019-12-27 15:07:21,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:21,914 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:21,914 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:22,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:22,118 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:22,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:22,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380779, now seen corresponding path program 19 times [2019-12-27 15:07:22,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:22,119 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141740739] [2019-12-27 15:07:22,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:22,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141740739] [2019-12-27 15:07:22,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304691373] [2019-12-27 15:07:22,178 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:22,221 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:22,222 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:22,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:22,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:22,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1330613673] [2019-12-27 15:07:22,275 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:22,276 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:22,277 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:22,277 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:22,278 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:22,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:22,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:22,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:22,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:22,280 INFO L87 Difference]: Start difference. First operand 83 states and 183 transitions. Second operand 7 states. [2019-12-27 15:07:22,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:22,370 INFO L93 Difference]: Finished difference Result 108 states and 227 transitions. [2019-12-27 15:07:22,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:22,371 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:22,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:22,372 INFO L225 Difference]: With dead ends: 108 [2019-12-27 15:07:22,372 INFO L226 Difference]: Without dead ends: 107 [2019-12-27 15:07:22,372 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:22,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-27 15:07:22,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2019-12-27 15:07:22,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:22,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:22,375 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:22,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:22,376 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:22,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:22,381 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:22,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:22,381 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:22,382 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:22,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:22,585 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:22,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:22,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380934, now seen corresponding path program 20 times [2019-12-27 15:07:22,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:22,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490192033] [2019-12-27 15:07:22,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:22,643 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 15:07:22,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490192033] [2019-12-27 15:07:22,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826485890] [2019-12-27 15:07:22,644 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 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 15:07:22,689 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:22,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:22,689 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:22,690 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:22,787 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 15:07:22,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:22,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:22,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1508569638] [2019-12-27 15:07:22,788 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:22,789 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:22,791 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:22,791 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:22,792 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:22,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:22,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:22,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:22,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:22,793 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:22,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:22,877 INFO L93 Difference]: Finished difference Result 110 states and 232 transitions. [2019-12-27 15:07:22,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:22,878 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:22,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:22,879 INFO L225 Difference]: With dead ends: 110 [2019-12-27 15:07:22,879 INFO L226 Difference]: Without dead ends: 109 [2019-12-27 15:07:22,879 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:22,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-27 15:07:22,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2019-12-27 15:07:22,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 15:07:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 15:07:22,883 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 15:07:22,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:22,883 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 15:07:22,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:22,883 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 15:07:22,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:22,884 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:22,884 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:23,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:23,085 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:23,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1435385584, now seen corresponding path program 21 times [2019-12-27 15:07:23,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:23,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921654907] [2019-12-27 15:07:23,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:23,140 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 15:07:23,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921654907] [2019-12-27 15:07:23,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475810131] [2019-12-27 15:07:23,141 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 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 15:07:23,189 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:23,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:23,190 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 15:07:23,191 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:23,238 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 15:07:23,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:23,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:23,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [931601959] [2019-12-27 15:07:23,239 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:23,240 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:23,241 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:23,241 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:23,242 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:23,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:23,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:23,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:23,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:23,243 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 7 states. [2019-12-27 15:07:23,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:23,354 INFO L93 Difference]: Finished difference Result 105 states and 221 transitions. [2019-12-27 15:07:23,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:23,355 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:23,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:23,356 INFO L225 Difference]: With dead ends: 105 [2019-12-27 15:07:23,356 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 15:07:23,356 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:23,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 15:07:23,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2019-12-27 15:07:23,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:23,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:23,359 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:23,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:23,360 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:23,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:23,360 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:23,360 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:23,360 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:23,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:23,561 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:23,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:23,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1435385739, now seen corresponding path program 22 times [2019-12-27 15:07:23,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:23,563 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942289780] [2019-12-27 15:07:23,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:23,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942289780] [2019-12-27 15:07:23,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438087777] [2019-12-27 15:07:23,625 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 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 15:07:23,668 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:23,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:23,669 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:23,669 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:23,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:23,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:23,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1123853043] [2019-12-27 15:07:23,748 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:23,749 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:23,750 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:23,750 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:23,751 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:23,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:23,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:23,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:23,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:23,752 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:23,855 INFO L93 Difference]: Finished difference Result 104 states and 214 transitions. [2019-12-27 15:07:23,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:07:23,856 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:23,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:23,856 INFO L225 Difference]: With dead ends: 104 [2019-12-27 15:07:23,856 INFO L226 Difference]: Without dead ends: 103 [2019-12-27 15:07:23,857 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:23,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-27 15:07:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 86. [2019-12-27 15:07:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 15:07:23,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-27 15:07:23,859 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-27 15:07:23,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:23,859 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-27 15:07:23,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:23,859 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-27 15:07:23,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:23,860 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:23,860 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:24,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:24,064 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:24,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:24,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2065667792, now seen corresponding path program 5 times [2019-12-27 15:07:24,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:24,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195481701] [2019-12-27 15:07:24,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:24,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195481701] [2019-12-27 15:07:24,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485728400] [2019-12-27 15:07:24,129 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 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 15:07:24,174 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:24,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:24,175 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:24,175 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:24,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:24,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:24,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [947628032] [2019-12-27 15:07:24,290 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:24,291 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:24,294 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 35 transitions. [2019-12-27 15:07:24,294 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:24,298 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 10 times. [2019-12-27 15:07:24,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:24,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:24,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:24,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:24,300 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 8 states. [2019-12-27 15:07:24,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:24,463 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-27 15:07:24,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:24,464 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-27 15:07:24,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:24,465 INFO L225 Difference]: With dead ends: 107 [2019-12-27 15:07:24,465 INFO L226 Difference]: Without dead ends: 106 [2019-12-27 15:07:24,467 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:24,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-27 15:07:24,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-12-27 15:07:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-27 15:07:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-27 15:07:24,471 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-27 15:07:24,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:24,472 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-27 15:07:24,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:24,472 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-27 15:07:24,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:24,472 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:24,473 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:24,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:24,673 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:24,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:24,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1717033399, now seen corresponding path program 6 times [2019-12-27 15:07:24,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:24,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334296901] [2019-12-27 15:07:24,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:24,780 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 15:07:24,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334296901] [2019-12-27 15:07:24,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629639846] [2019-12-27 15:07:24,780 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 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 15:07:24,825 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 15:07:24,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:24,826 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:07:24,827 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:24,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 15:07:24,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 15 [2019-12-27 15:07:24,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1328019481] [2019-12-27 15:07:24,892 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:24,893 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:24,895 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 13 states and 12 transitions. [2019-12-27 15:07:24,895 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:24,895 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:24,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:24,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:24,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:24,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:24,895 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 8 states. [2019-12-27 15:07:24,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:24,927 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2019-12-27 15:07:24,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:24,928 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:24,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:24,929 INFO L225 Difference]: With dead ends: 124 [2019-12-27 15:07:24,929 INFO L226 Difference]: Without dead ends: 115 [2019-12-27 15:07:24,929 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:24,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-27 15:07:24,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-12-27 15:07:24,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:07:24,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 274 transitions. [2019-12-27 15:07:24,933 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 274 transitions. Word has length 12 [2019-12-27 15:07:24,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:24,933 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 274 transitions. [2019-12-27 15:07:24,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:24,934 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 274 transitions. [2019-12-27 15:07:24,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:24,934 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:24,934 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:25,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:25,138 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:25,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:25,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1717034515, now seen corresponding path program 23 times [2019-12-27 15:07:25,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:25,138 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690008822] [2019-12-27 15:07:25,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:25,232 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 15:07:25,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690008822] [2019-12-27 15:07:25,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466766435] [2019-12-27 15:07:25,232 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 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 15:07:25,295 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:25,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:25,296 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:25,297 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:25,399 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 15:07:25,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:25,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:25,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [344443485] [2019-12-27 15:07:25,400 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:25,401 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:25,403 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 26 transitions. [2019-12-27 15:07:25,404 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:25,404 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:25,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:25,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:25,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:25,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:25,405 INFO L87 Difference]: Start difference. First operand 115 states and 274 transitions. Second operand 8 states. [2019-12-27 15:07:25,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:25,438 INFO L93 Difference]: Finished difference Result 133 states and 305 transitions. [2019-12-27 15:07:25,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:25,439 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:25,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:25,439 INFO L225 Difference]: With dead ends: 133 [2019-12-27 15:07:25,440 INFO L226 Difference]: Without dead ends: 132 [2019-12-27 15:07:25,440 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:25,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-27 15:07:25,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 117. [2019-12-27 15:07:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 15:07:25,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 279 transitions. [2019-12-27 15:07:25,446 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 279 transitions. Word has length 12 [2019-12-27 15:07:25,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:25,446 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 279 transitions. [2019-12-27 15:07:25,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:25,446 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 279 transitions. [2019-12-27 15:07:25,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:25,447 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:25,447 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:25,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:25,651 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:25,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:25,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1717068150, now seen corresponding path program 24 times [2019-12-27 15:07:25,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:25,652 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081839886] [2019-12-27 15:07:25,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:25,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081839886] [2019-12-27 15:07:25,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817136458] [2019-12-27 15:07:25,716 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 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 15:07:25,759 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:25,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:25,760 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:25,761 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:25,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:25,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:25,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1528013415] [2019-12-27 15:07:25,848 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:25,849 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:25,850 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:25,850 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:25,851 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:25,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:25,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:25,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:25,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:25,852 INFO L87 Difference]: Start difference. First operand 117 states and 279 transitions. Second operand 8 states. [2019-12-27 15:07:25,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:25,892 INFO L93 Difference]: Finished difference Result 140 states and 321 transitions. [2019-12-27 15:07:25,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:25,893 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:25,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:25,894 INFO L225 Difference]: With dead ends: 140 [2019-12-27 15:07:25,894 INFO L226 Difference]: Without dead ends: 139 [2019-12-27 15:07:25,895 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:25,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-27 15:07:25,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 118. [2019-12-27 15:07:25,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-27 15:07:25,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 283 transitions. [2019-12-27 15:07:25,900 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 283 transitions. Word has length 12 [2019-12-27 15:07:25,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:25,900 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 283 transitions. [2019-12-27 15:07:25,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:25,900 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 283 transitions. [2019-12-27 15:07:25,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:25,902 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:25,903 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:26,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:26,106 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:26,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:26,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1717067995, now seen corresponding path program 25 times [2019-12-27 15:07:26,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:26,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019109163] [2019-12-27 15:07:26,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:26,176 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 15:07:26,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019109163] [2019-12-27 15:07:26,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058578943] [2019-12-27 15:07:26,177 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 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 15:07:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:26,221 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:26,222 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:28,690 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 15:07:28,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:28,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:28,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1362446050] [2019-12-27 15:07:28,691 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:28,692 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:28,694 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:28,694 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:28,694 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:28,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:28,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:28,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:28,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=114, Unknown=2, NotChecked=0, Total=182 [2019-12-27 15:07:28,695 INFO L87 Difference]: Start difference. First operand 118 states and 283 transitions. Second operand 8 states. [2019-12-27 15:07:28,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:28,761 INFO L93 Difference]: Finished difference Result 140 states and 321 transitions. [2019-12-27 15:07:28,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:28,762 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:28,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:28,763 INFO L225 Difference]: With dead ends: 140 [2019-12-27 15:07:28,763 INFO L226 Difference]: Without dead ends: 139 [2019-12-27 15:07:28,764 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=79, Invalid=129, Unknown=2, NotChecked=0, Total=210 [2019-12-27 15:07:28,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-27 15:07:28,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 119. [2019-12-27 15:07:28,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-27 15:07:28,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 284 transitions. [2019-12-27 15:07:28,769 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 284 transitions. Word has length 12 [2019-12-27 15:07:28,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:28,769 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 284 transitions. [2019-12-27 15:07:28,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:28,770 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 284 transitions. [2019-12-27 15:07:28,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:28,770 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:28,770 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:28,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:28,973 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:28,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:28,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110835, now seen corresponding path program 26 times [2019-12-27 15:07:28,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:28,974 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138873122] [2019-12-27 15:07:28,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:29,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138873122] [2019-12-27 15:07:29,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714853105] [2019-12-27 15:07:29,036 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 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 15:07:29,083 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:29,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:29,084 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:29,085 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:29,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:29,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:29,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [212029915] [2019-12-27 15:07:29,186 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:29,186 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:29,187 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:29,188 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:29,188 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:29,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:29,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:29,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:29,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:29,188 INFO L87 Difference]: Start difference. First operand 119 states and 284 transitions. Second operand 8 states. [2019-12-27 15:07:29,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:29,259 INFO L93 Difference]: Finished difference Result 142 states and 326 transitions. [2019-12-27 15:07:29,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:29,259 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:29,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:29,260 INFO L225 Difference]: With dead ends: 142 [2019-12-27 15:07:29,260 INFO L226 Difference]: Without dead ends: 141 [2019-12-27 15:07:29,260 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:29,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-27 15:07:29,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2019-12-27 15:07:29,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-27 15:07:29,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 292 transitions. [2019-12-27 15:07:29,263 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 292 transitions. Word has length 12 [2019-12-27 15:07:29,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:29,264 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 292 transitions. [2019-12-27 15:07:29,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:29,264 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 292 transitions. [2019-12-27 15:07:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:29,264 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:29,264 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:29,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:29,468 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:29,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110680, now seen corresponding path program 27 times [2019-12-27 15:07:29,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:29,470 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595072581] [2019-12-27 15:07:29,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:29,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595072581] [2019-12-27 15:07:29,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717151171] [2019-12-27 15:07:29,558 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 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 15:07:29,622 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:29,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:29,623 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:29,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:29,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:29,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:29,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [899374766] [2019-12-27 15:07:29,777 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:29,778 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:29,780 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:29,781 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:29,781 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:29,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:29,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:29,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:29,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:29,783 INFO L87 Difference]: Start difference. First operand 121 states and 292 transitions. Second operand 8 states. [2019-12-27 15:07:29,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:29,865 INFO L93 Difference]: Finished difference Result 149 states and 345 transitions. [2019-12-27 15:07:29,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:29,865 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:29,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:29,866 INFO L225 Difference]: With dead ends: 149 [2019-12-27 15:07:29,866 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 15:07:29,867 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:29,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 15:07:29,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 120. [2019-12-27 15:07:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-27 15:07:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 288 transitions. [2019-12-27 15:07:29,870 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 288 transitions. Word has length 12 [2019-12-27 15:07:29,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:29,871 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 288 transitions. [2019-12-27 15:07:29,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:29,871 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 288 transitions. [2019-12-27 15:07:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:29,871 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:29,871 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:30,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:30,075 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:30,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:30,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1718106030, now seen corresponding path program 28 times [2019-12-27 15:07:30,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:30,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508663038] [2019-12-27 15:07:30,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:30,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508663038] [2019-12-27 15:07:30,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132009400] [2019-12-27 15:07:30,142 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 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 15:07:30,181 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:30,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:30,182 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:30,183 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:30,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:30,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:30,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [542463159] [2019-12-27 15:07:30,288 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:30,289 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:30,290 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:30,290 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:30,291 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:30,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:30,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:30,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:30,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:30,291 INFO L87 Difference]: Start difference. First operand 120 states and 288 transitions. Second operand 8 states. [2019-12-27 15:07:30,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:30,368 INFO L93 Difference]: Finished difference Result 148 states and 341 transitions. [2019-12-27 15:07:30,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:30,368 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:30,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:30,370 INFO L225 Difference]: With dead ends: 148 [2019-12-27 15:07:30,370 INFO L226 Difference]: Without dead ends: 147 [2019-12-27 15:07:30,371 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:30,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-12-27 15:07:30,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 121. [2019-12-27 15:07:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-27 15:07:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 292 transitions. [2019-12-27 15:07:30,375 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 292 transitions. Word has length 12 [2019-12-27 15:07:30,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:30,376 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 292 transitions. [2019-12-27 15:07:30,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 292 transitions. [2019-12-27 15:07:30,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:30,376 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:30,376 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:30,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:30,580 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:30,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:30,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1718105875, now seen corresponding path program 29 times [2019-12-27 15:07:30,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:30,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881600019] [2019-12-27 15:07:30,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:30,651 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 15:07:30,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881600019] [2019-12-27 15:07:30,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525502545] [2019-12-27 15:07:30,652 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 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 15:07:30,696 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:30,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:30,697 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:30,698 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:30,852 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 15:07:30,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:30,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:30,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [725030899] [2019-12-27 15:07:30,853 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:30,855 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:30,858 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:30,858 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:30,858 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:30,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:30,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:30,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:30,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:30,860 INFO L87 Difference]: Start difference. First operand 121 states and 292 transitions. Second operand 8 states. [2019-12-27 15:07:30,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:30,967 INFO L93 Difference]: Finished difference Result 143 states and 330 transitions. [2019-12-27 15:07:30,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:30,968 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:30,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:30,969 INFO L225 Difference]: With dead ends: 143 [2019-12-27 15:07:30,969 INFO L226 Difference]: Without dead ends: 142 [2019-12-27 15:07:30,970 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:30,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-27 15:07:30,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 121. [2019-12-27 15:07:30,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-27 15:07:30,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 289 transitions. [2019-12-27 15:07:30,976 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 289 transitions. Word has length 12 [2019-12-27 15:07:30,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:30,976 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 289 transitions. [2019-12-27 15:07:30,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:30,977 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 289 transitions. [2019-12-27 15:07:30,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:30,977 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:30,977 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:31,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:31,178 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:31,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:31,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1750434070, now seen corresponding path program 30 times [2019-12-27 15:07:31,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:31,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102479187] [2019-12-27 15:07:31,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:31,244 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 15:07:31,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102479187] [2019-12-27 15:07:31,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119303688] [2019-12-27 15:07:31,245 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 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 15:07:31,290 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:31,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:31,305 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:31,306 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:31,370 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 15:07:31,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:31,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:31,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1408372047] [2019-12-27 15:07:31,371 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:31,372 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:31,373 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:31,373 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:31,374 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:31,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:31,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:31,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:31,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:31,375 INFO L87 Difference]: Start difference. First operand 121 states and 289 transitions. Second operand 8 states. [2019-12-27 15:07:31,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:31,460 INFO L93 Difference]: Finished difference Result 143 states and 324 transitions. [2019-12-27 15:07:31,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:31,461 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:31,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:31,462 INFO L225 Difference]: With dead ends: 143 [2019-12-27 15:07:31,464 INFO L226 Difference]: Without dead ends: 142 [2019-12-27 15:07:31,464 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:31,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-27 15:07:31,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2019-12-27 15:07:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:07:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-27 15:07:31,469 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 12 [2019-12-27 15:07:31,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:31,469 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-27 15:07:31,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:31,471 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-27 15:07:31,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:31,472 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:31,472 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:31,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:31,678 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:31,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:31,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1750433915, now seen corresponding path program 31 times [2019-12-27 15:07:31,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:31,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285299991] [2019-12-27 15:07:31,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:31,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285299991] [2019-12-27 15:07:31,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239738128] [2019-12-27 15:07:31,756 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 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 15:07:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:31,800 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:31,801 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:31,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:31,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:31,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1372706804] [2019-12-27 15:07:31,885 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:31,885 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:31,887 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:31,887 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:31,888 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:31,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:31,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:31,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:31,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:31,889 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 8 states. [2019-12-27 15:07:31,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:31,991 INFO L93 Difference]: Finished difference Result 149 states and 345 transitions. [2019-12-27 15:07:31,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:31,992 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:31,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:31,992 INFO L225 Difference]: With dead ends: 149 [2019-12-27 15:07:31,992 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 15:07:31,993 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:31,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 15:07:31,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 124. [2019-12-27 15:07:31,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:07:31,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 298 transitions. [2019-12-27 15:07:31,997 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 298 transitions. Word has length 12 [2019-12-27 15:07:31,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:31,997 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 298 transitions. [2019-12-27 15:07:31,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 298 transitions. [2019-12-27 15:07:31,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:31,998 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:31,998 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:32,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:32,201 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:32,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:32,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429265, now seen corresponding path program 32 times [2019-12-27 15:07:32,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:32,202 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942702349] [2019-12-27 15:07:32,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:32,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942702349] [2019-12-27 15:07:32,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147990495] [2019-12-27 15:07:32,272 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 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 15:07:32,315 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:32,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:32,316 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:32,317 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:32,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:32,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:32,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:32,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [319842730] [2019-12-27 15:07:32,421 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:32,422 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:32,424 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:32,424 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:32,424 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:32,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:32,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:32,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:32,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:32,425 INFO L87 Difference]: Start difference. First operand 124 states and 298 transitions. Second operand 8 states. [2019-12-27 15:07:33,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:33,294 INFO L93 Difference]: Finished difference Result 154 states and 356 transitions. [2019-12-27 15:07:33,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:33,295 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:33,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:33,296 INFO L225 Difference]: With dead ends: 154 [2019-12-27 15:07:33,296 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 15:07:33,296 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=175, Unknown=1, NotChecked=0, Total=272 [2019-12-27 15:07:33,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 15:07:33,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 125. [2019-12-27 15:07:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:07:33,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-27 15:07:33,301 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 12 [2019-12-27 15:07:33,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:33,301 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-27 15:07:33,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:33,301 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-27 15:07:33,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:33,302 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:33,302 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:33,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:33,506 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:33,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:33,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429110, now seen corresponding path program 33 times [2019-12-27 15:07:33,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:33,507 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848787294] [2019-12-27 15:07:33,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:33,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848787294] [2019-12-27 15:07:33,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282972075] [2019-12-27 15:07:33,581 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 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 15:07:33,635 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:33,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:33,637 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:33,638 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:33,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:33,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:33,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [385945745] [2019-12-27 15:07:33,762 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:33,764 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:33,767 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:33,768 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:33,768 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:33,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:33,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:33,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:33,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:33,769 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 8 states. [2019-12-27 15:07:33,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:33,892 INFO L93 Difference]: Finished difference Result 153 states and 355 transitions. [2019-12-27 15:07:33,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:33,893 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:33,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:33,894 INFO L225 Difference]: With dead ends: 153 [2019-12-27 15:07:33,895 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 15:07:33,895 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:33,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 15:07:33,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 123. [2019-12-27 15:07:33,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-12-27 15:07:33,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 294 transitions. [2019-12-27 15:07:33,902 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 294 transitions. Word has length 12 [2019-12-27 15:07:33,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:33,902 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 294 transitions. [2019-12-27 15:07:33,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:33,903 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 294 transitions. [2019-12-27 15:07:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:33,904 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:33,905 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:34,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:34,105 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:34,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:34,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1750285115, now seen corresponding path program 34 times [2019-12-27 15:07:34,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:34,106 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48620867] [2019-12-27 15:07:34,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:34,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48620867] [2019-12-27 15:07:34,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534848266] [2019-12-27 15:07:34,170 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 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 15:07:34,217 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:34,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:34,219 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:34,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:34,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:34,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:34,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2027460731] [2019-12-27 15:07:34,309 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:34,310 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:34,312 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:34,312 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:34,313 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:34,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:34,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:34,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:34,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:34,314 INFO L87 Difference]: Start difference. First operand 123 states and 294 transitions. Second operand 8 states. [2019-12-27 15:07:34,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:34,405 INFO L93 Difference]: Finished difference Result 155 states and 357 transitions. [2019-12-27 15:07:34,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:34,406 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:34,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:34,407 INFO L225 Difference]: With dead ends: 155 [2019-12-27 15:07:34,407 INFO L226 Difference]: Without dead ends: 154 [2019-12-27 15:07:34,407 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:34,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-27 15:07:34,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 125. [2019-12-27 15:07:34,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:07:34,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-27 15:07:34,411 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 12 [2019-12-27 15:07:34,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:34,411 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-27 15:07:34,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:34,411 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-27 15:07:34,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:34,412 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:34,412 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:34,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:34,616 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:34,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:34,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1750284960, now seen corresponding path program 35 times [2019-12-27 15:07:34,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:34,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209126557] [2019-12-27 15:07:34,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:34,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209126557] [2019-12-27 15:07:34,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300215595] [2019-12-27 15:07:34,686 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 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 15:07:34,729 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:34,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:34,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:34,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:34,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:34,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:34,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1340286459] [2019-12-27 15:07:34,816 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:34,817 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:34,819 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:34,819 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:34,819 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:34,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:34,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:34,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:34,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:34,820 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 8 states. [2019-12-27 15:07:34,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:34,918 INFO L93 Difference]: Finished difference Result 155 states and 360 transitions. [2019-12-27 15:07:34,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:34,919 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:34,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:34,920 INFO L225 Difference]: With dead ends: 155 [2019-12-27 15:07:34,921 INFO L226 Difference]: Without dead ends: 154 [2019-12-27 15:07:34,921 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:34,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-27 15:07:34,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2019-12-27 15:07:34,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:07:34,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 298 transitions. [2019-12-27 15:07:34,928 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 298 transitions. Word has length 12 [2019-12-27 15:07:34,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:34,928 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 298 transitions. [2019-12-27 15:07:34,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:34,929 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 298 transitions. [2019-12-27 15:07:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:34,929 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:34,929 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:35,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:35,133 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:35,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:35,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280310, now seen corresponding path program 36 times [2019-12-27 15:07:35,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:35,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647303519] [2019-12-27 15:07:35,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:35,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647303519] [2019-12-27 15:07:35,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685101502] [2019-12-27 15:07:35,200 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 15:07:35,243 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:35,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:35,244 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:35,245 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:35,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:35,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:35,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [200881207] [2019-12-27 15:07:35,349 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:35,350 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:35,351 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:35,351 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:35,352 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:35,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:35,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:35,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:35,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:35,352 INFO L87 Difference]: Start difference. First operand 124 states and 298 transitions. Second operand 8 states. [2019-12-27 15:07:35,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:35,446 INFO L93 Difference]: Finished difference Result 154 states and 356 transitions. [2019-12-27 15:07:35,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:35,446 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:35,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:35,448 INFO L225 Difference]: With dead ends: 154 [2019-12-27 15:07:35,448 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 15:07:35,448 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 15:07:35,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 125. [2019-12-27 15:07:35,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:07:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-27 15:07:35,452 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 12 [2019-12-27 15:07:35,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:35,452 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-27 15:07:35,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:35,452 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-27 15:07:35,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:35,452 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:35,453 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:35,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:35,653 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:35,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:35,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280155, now seen corresponding path program 37 times [2019-12-27 15:07:35,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:35,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089633229] [2019-12-27 15:07:35,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:35,728 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 15:07:35,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089633229] [2019-12-27 15:07:35,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103675753] [2019-12-27 15:07:35,729 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 15:07:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:35,782 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:35,783 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:35,871 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 15:07:35,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:35,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:35,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [910096814] [2019-12-27 15:07:35,872 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:35,873 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:35,875 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:35,875 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:35,875 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:35,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:35,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:35,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:35,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:35,876 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 8 states. [2019-12-27 15:07:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:35,973 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2019-12-27 15:07:35,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:35,974 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:35,975 INFO L225 Difference]: With dead ends: 143 [2019-12-27 15:07:35,975 INFO L226 Difference]: Without dead ends: 142 [2019-12-27 15:07:35,976 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:35,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-27 15:07:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 124. [2019-12-27 15:07:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:07:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 15:07:35,979 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-27 15:07:35,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:35,980 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 15:07:35,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:35,980 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 15:07:35,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:35,980 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:35,980 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:36,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:36,181 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:36,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1542513096, now seen corresponding path program 38 times [2019-12-27 15:07:36,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:36,182 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393786655] [2019-12-27 15:07:36,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:36,241 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 15:07:36,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393786655] [2019-12-27 15:07:36,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473230093] [2019-12-27 15:07:36,242 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 15:07:36,299 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:36,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:36,299 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:36,300 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:36,370 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 15:07:36,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:36,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:36,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1494958488] [2019-12-27 15:07:36,371 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:36,372 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:36,374 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 42 transitions. [2019-12-27 15:07:36,374 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:36,377 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:07:36,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:36,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:36,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:36,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:36,378 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 8 states. [2019-12-27 15:07:36,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:36,501 INFO L93 Difference]: Finished difference Result 148 states and 335 transitions. [2019-12-27 15:07:36,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:36,501 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:36,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:36,503 INFO L225 Difference]: With dead ends: 148 [2019-12-27 15:07:36,503 INFO L226 Difference]: Without dead ends: 147 [2019-12-27 15:07:36,503 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:36,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-12-27 15:07:36,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2019-12-27 15:07:36,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:07:36,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 15:07:36,507 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-27 15:07:36,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:36,508 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 15:07:36,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:36,508 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 15:07:36,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:36,508 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:36,509 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:36,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:36,712 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:36,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:36,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517746, now seen corresponding path program 39 times [2019-12-27 15:07:36,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:36,713 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573494512] [2019-12-27 15:07:36,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:36,780 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 15:07:36,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573494512] [2019-12-27 15:07:36,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002679323] [2019-12-27 15:07:36,781 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 15:07:36,821 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:36,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:36,822 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:36,822 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:36,904 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 15:07:36,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:36,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:36,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1104329868] [2019-12-27 15:07:36,905 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:36,906 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:36,908 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 36 transitions. [2019-12-27 15:07:36,908 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:36,910 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:07:36,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:36,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:36,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:36,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:36,911 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 8 states. [2019-12-27 15:07:37,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:37,074 INFO L93 Difference]: Finished difference Result 156 states and 352 transitions. [2019-12-27 15:07:37,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:37,074 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:37,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:37,076 INFO L225 Difference]: With dead ends: 156 [2019-12-27 15:07:37,076 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 15:07:37,077 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:37,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 15:07:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 125. [2019-12-27 15:07:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:07:37,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 299 transitions. [2019-12-27 15:07:37,081 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 299 transitions. Word has length 12 [2019-12-27 15:07:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:37,082 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 299 transitions. [2019-12-27 15:07:37,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:37,082 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 299 transitions. [2019-12-27 15:07:37,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:37,083 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:37,083 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:37,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:37,286 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:37,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:37,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517901, now seen corresponding path program 40 times [2019-12-27 15:07:37,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:37,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248554065] [2019-12-27 15:07:37,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:37,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248554065] [2019-12-27 15:07:37,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835667567] [2019-12-27 15:07:37,363 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:07:37,425 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:37,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:37,426 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:37,427 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:37,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:37,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:37,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [510830102] [2019-12-27 15:07:37,548 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:37,550 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:37,553 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 36 transitions. [2019-12-27 15:07:37,553 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:37,556 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:07:37,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:37,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:37,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:37,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:37,557 INFO L87 Difference]: Start difference. First operand 125 states and 299 transitions. Second operand 8 states. [2019-12-27 15:07:37,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:37,681 INFO L93 Difference]: Finished difference Result 155 states and 351 transitions. [2019-12-27 15:07:37,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:37,681 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:37,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:37,682 INFO L225 Difference]: With dead ends: 155 [2019-12-27 15:07:37,682 INFO L226 Difference]: Without dead ends: 154 [2019-12-27 15:07:37,682 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:37,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-27 15:07:37,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2019-12-27 15:07:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:07:37,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 15:07:37,686 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-27 15:07:37,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:37,687 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 15:07:37,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:37,687 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 15:07:37,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:37,687 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:37,688 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:37,891 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:37,891 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:37,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:37,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1542661896, now seen corresponding path program 41 times [2019-12-27 15:07:37,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:37,892 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293917152] [2019-12-27 15:07:37,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:37,982 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 15:07:37,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293917152] [2019-12-27 15:07:37,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921146746] [2019-12-27 15:07:37,983 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 15:07:38,041 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:38,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:38,042 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:38,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:38,146 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 15:07:38,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:38,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:38,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [823203865] [2019-12-27 15:07:38,147 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:38,148 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:38,150 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:38,150 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:38,152 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:38,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:38,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:38,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:38,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:38,153 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 8 states. [2019-12-27 15:07:38,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:38,344 INFO L93 Difference]: Finished difference Result 157 states and 353 transitions. [2019-12-27 15:07:38,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:38,345 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:38,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:38,346 INFO L225 Difference]: With dead ends: 157 [2019-12-27 15:07:38,347 INFO L226 Difference]: Without dead ends: 156 [2019-12-27 15:07:38,347 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:38,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-27 15:07:38,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 126. [2019-12-27 15:07:38,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 15:07:38,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-27 15:07:38,352 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-27 15:07:38,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:38,352 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-27 15:07:38,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:38,352 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-27 15:07:38,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:38,354 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:38,354 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:38,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:38,558 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:38,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:38,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1542662051, now seen corresponding path program 42 times [2019-12-27 15:07:38,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:38,558 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353140939] [2019-12-27 15:07:38,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:38,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353140939] [2019-12-27 15:07:38,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993900807] [2019-12-27 15:07:38,635 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 15:07:38,692 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:38,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:38,692 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:38,693 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:38,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:38,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:38,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1516777887] [2019-12-27 15:07:38,815 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:38,816 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:38,818 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:38,818 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:38,820 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:38,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:38,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:38,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:38,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:38,821 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 8 states. [2019-12-27 15:07:39,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:39,003 INFO L93 Difference]: Finished difference Result 157 states and 356 transitions. [2019-12-27 15:07:39,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:39,004 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:39,006 INFO L225 Difference]: With dead ends: 157 [2019-12-27 15:07:39,006 INFO L226 Difference]: Without dead ends: 156 [2019-12-27 15:07:39,006 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:39,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-27 15:07:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 125. [2019-12-27 15:07:39,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:07:39,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 299 transitions. [2019-12-27 15:07:39,010 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 299 transitions. Word has length 12 [2019-12-27 15:07:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:39,010 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 299 transitions. [2019-12-27 15:07:39,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:39,010 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 299 transitions. [2019-12-27 15:07:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:39,010 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:39,010 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:39,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:39,211 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:39,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:39,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1542666701, now seen corresponding path program 43 times [2019-12-27 15:07:39,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:39,213 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931252192] [2019-12-27 15:07:39,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:39,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931252192] [2019-12-27 15:07:39,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328854735] [2019-12-27 15:07:39,282 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 15:07:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:39,332 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:39,333 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:39,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:39,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:39,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [357114476] [2019-12-27 15:07:39,432 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:39,433 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:39,435 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:39,435 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:39,436 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:39,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:39,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:39,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:39,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:39,437 INFO L87 Difference]: Start difference. First operand 125 states and 299 transitions. Second operand 8 states. [2019-12-27 15:07:39,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:39,588 INFO L93 Difference]: Finished difference Result 158 states and 357 transitions. [2019-12-27 15:07:39,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:39,588 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:39,589 INFO L225 Difference]: With dead ends: 158 [2019-12-27 15:07:39,590 INFO L226 Difference]: Without dead ends: 157 [2019-12-27 15:07:39,590 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:39,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-12-27 15:07:39,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 126. [2019-12-27 15:07:39,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 15:07:39,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-27 15:07:39,593 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-27 15:07:39,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:39,594 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-27 15:07:39,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:39,594 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-27 15:07:39,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:39,594 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:39,594 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:39,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:39,796 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:39,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:39,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1542666856, now seen corresponding path program 44 times [2019-12-27 15:07:39,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:39,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802372384] [2019-12-27 15:07:39,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:39,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802372384] [2019-12-27 15:07:39,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62530131] [2019-12-27 15:07:39,861 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 15:07:39,901 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:39,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:39,902 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:39,902 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:39,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:39,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:39,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [334150071] [2019-12-27 15:07:39,988 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:39,989 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:39,991 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:39,991 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:39,993 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:39,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:39,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:39,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:39,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:39,994 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 8 states. [2019-12-27 15:07:40,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:40,118 INFO L93 Difference]: Finished difference Result 150 states and 340 transitions. [2019-12-27 15:07:40,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:40,118 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:40,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:40,119 INFO L225 Difference]: With dead ends: 150 [2019-12-27 15:07:40,120 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 15:07:40,120 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:40,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 15:07:40,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 124. [2019-12-27 15:07:40,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:07:40,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 15:07:40,124 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-27 15:07:40,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:40,125 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 15:07:40,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:40,125 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 15:07:40,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:40,125 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:40,126 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:40,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:40,329 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:40,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:40,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130546, now seen corresponding path program 45 times [2019-12-27 15:07:40,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:40,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386488995] [2019-12-27 15:07:40,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:40,396 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 15:07:40,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386488995] [2019-12-27 15:07:40,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750031954] [2019-12-27 15:07:40,397 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 15:07:40,440 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:40,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:40,441 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:40,441 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:40,504 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 15:07:40,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:40,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:40,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1419014482] [2019-12-27 15:07:40,505 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:40,506 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:40,508 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:40,508 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:40,508 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:40,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:40,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:40,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:40,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:40,509 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 8 states. [2019-12-27 15:07:40,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:40,649 INFO L93 Difference]: Finished difference Result 157 states and 356 transitions. [2019-12-27 15:07:40,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:40,649 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:40,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:40,650 INFO L225 Difference]: With dead ends: 157 [2019-12-27 15:07:40,650 INFO L226 Difference]: Without dead ends: 156 [2019-12-27 15:07:40,651 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:40,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-27 15:07:40,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 127. [2019-12-27 15:07:40,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 15:07:40,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-27 15:07:40,654 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-27 15:07:40,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:40,655 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-27 15:07:40,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:40,655 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-27 15:07:40,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:40,655 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:40,656 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:40,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:40,859 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:40,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:40,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130701, now seen corresponding path program 46 times [2019-12-27 15:07:40,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:40,861 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415160924] [2019-12-27 15:07:40,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:40,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415160924] [2019-12-27 15:07:40,947 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254178014] [2019-12-27 15:07:40,947 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 15:07:41,005 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:41,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:41,006 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:41,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:41,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:41,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:41,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [822595284] [2019-12-27 15:07:41,097 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:41,098 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:41,100 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:41,100 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:41,102 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:41,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:41,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:41,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:41,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:41,103 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 8 states. [2019-12-27 15:07:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:41,239 INFO L93 Difference]: Finished difference Result 160 states and 368 transitions. [2019-12-27 15:07:41,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:41,240 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:41,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:41,241 INFO L225 Difference]: With dead ends: 160 [2019-12-27 15:07:41,241 INFO L226 Difference]: Without dead ends: 159 [2019-12-27 15:07:41,242 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:41,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-27 15:07:41,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 126. [2019-12-27 15:07:41,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 15:07:41,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-27 15:07:41,245 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-27 15:07:41,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:41,246 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-27 15:07:41,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:41,246 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-27 15:07:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:41,246 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:41,246 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:41,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:41,447 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:41,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:41,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135351, now seen corresponding path program 47 times [2019-12-27 15:07:41,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:41,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688922560] [2019-12-27 15:07:41,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:41,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688922560] [2019-12-27 15:07:41,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946504681] [2019-12-27 15:07:41,519 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 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 15:07:41,570 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:41,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:41,572 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:41,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:41,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:41,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:41,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [37404625] [2019-12-27 15:07:41,696 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:41,697 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:41,699 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:41,699 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:41,701 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:41,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:41,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:41,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:41,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:41,702 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 8 states. [2019-12-27 15:07:41,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:41,839 INFO L93 Difference]: Finished difference Result 157 states and 359 transitions. [2019-12-27 15:07:41,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:41,839 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:41,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:41,840 INFO L225 Difference]: With dead ends: 157 [2019-12-27 15:07:41,840 INFO L226 Difference]: Without dead ends: 156 [2019-12-27 15:07:41,841 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:41,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-27 15:07:41,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 127. [2019-12-27 15:07:41,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 15:07:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-27 15:07:41,844 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-27 15:07:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:41,844 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-27 15:07:41,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:41,844 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-27 15:07:41,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:41,845 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:41,845 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:42,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:42,048 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:42,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:42,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135506, now seen corresponding path program 48 times [2019-12-27 15:07:42,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:42,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545403331] [2019-12-27 15:07:42,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:42,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545403331] [2019-12-27 15:07:42,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708035641] [2019-12-27 15:07:42,116 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 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 15:07:42,159 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:42,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:42,159 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:42,160 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:42,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:42,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:42,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [444409105] [2019-12-27 15:07:42,236 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:42,237 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:42,238 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:42,238 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:42,239 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:42,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:42,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:42,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:42,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:42,240 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 8 states. [2019-12-27 15:07:42,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:42,376 INFO L93 Difference]: Finished difference Result 160 states and 368 transitions. [2019-12-27 15:07:42,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:42,377 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:42,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:42,378 INFO L225 Difference]: With dead ends: 160 [2019-12-27 15:07:42,378 INFO L226 Difference]: Without dead ends: 159 [2019-12-27 15:07:42,379 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:42,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-27 15:07:42,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 125. [2019-12-27 15:07:42,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:07:42,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 299 transitions. [2019-12-27 15:07:42,383 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 299 transitions. Word has length 12 [2019-12-27 15:07:42,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:42,383 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 299 transitions. [2019-12-27 15:07:42,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:42,383 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 299 transitions. [2019-12-27 15:07:42,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:42,384 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:42,384 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:42,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:42,587 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:42,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:42,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1547279501, now seen corresponding path program 49 times [2019-12-27 15:07:42,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:42,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575371] [2019-12-27 15:07:42,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:42,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575371] [2019-12-27 15:07:42,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390915118] [2019-12-27 15:07:42,657 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 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 15:07:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:42,708 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:42,709 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:42,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:42,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:42,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [440211421] [2019-12-27 15:07:42,781 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:42,782 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:42,784 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:42,784 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:42,785 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:42,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:42,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:42,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:42,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:42,786 INFO L87 Difference]: Start difference. First operand 125 states and 299 transitions. Second operand 8 states. [2019-12-27 15:07:42,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:42,948 INFO L93 Difference]: Finished difference Result 161 states and 366 transitions. [2019-12-27 15:07:42,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:42,948 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:42,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:42,949 INFO L225 Difference]: With dead ends: 161 [2019-12-27 15:07:42,949 INFO L226 Difference]: Without dead ends: 160 [2019-12-27 15:07:42,950 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:42,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-27 15:07:42,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 127. [2019-12-27 15:07:42,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 15:07:42,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-27 15:07:42,954 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-27 15:07:42,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:42,955 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-27 15:07:42,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:42,955 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-27 15:07:42,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:42,955 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:42,955 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:43,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:43,159 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:43,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:43,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1547279656, now seen corresponding path program 50 times [2019-12-27 15:07:43,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:43,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690561590] [2019-12-27 15:07:43,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:43,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690561590] [2019-12-27 15:07:43,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176695607] [2019-12-27 15:07:43,229 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 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 15:07:43,273 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:43,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:43,274 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:43,275 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:43,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:43,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:43,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [302332158] [2019-12-27 15:07:43,377 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:43,377 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:43,379 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:43,379 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:43,380 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:43,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:43,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:43,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:43,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:43,380 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 8 states. [2019-12-27 15:07:43,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:43,542 INFO L93 Difference]: Finished difference Result 161 states and 369 transitions. [2019-12-27 15:07:43,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:43,543 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:43,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:43,544 INFO L225 Difference]: With dead ends: 161 [2019-12-27 15:07:43,544 INFO L226 Difference]: Without dead ends: 160 [2019-12-27 15:07:43,545 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:43,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-27 15:07:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 126. [2019-12-27 15:07:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 15:07:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-27 15:07:43,549 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-27 15:07:43,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:43,550 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-27 15:07:43,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:43,550 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-27 15:07:43,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:43,550 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:43,550 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:43,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:43,754 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:43,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:43,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1547284306, now seen corresponding path program 51 times [2019-12-27 15:07:43,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:43,755 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381073260] [2019-12-27 15:07:43,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:43,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:43,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381073260] [2019-12-27 15:07:43,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602171157] [2019-12-27 15:07:43,838 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 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 15:07:43,888 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:43,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:43,889 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 15:07:43,890 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:43,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:43,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:43,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [924141365] [2019-12-27 15:07:43,947 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:43,948 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:43,950 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:43,950 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:43,951 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:43,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:43,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:43,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:43,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:43,952 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 8 states. [2019-12-27 15:07:44,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:44,082 INFO L93 Difference]: Finished difference Result 155 states and 354 transitions. [2019-12-27 15:07:44,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:44,082 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:44,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:44,084 INFO L225 Difference]: With dead ends: 155 [2019-12-27 15:07:44,084 INFO L226 Difference]: Without dead ends: 154 [2019-12-27 15:07:44,084 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:44,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-27 15:07:44,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 127. [2019-12-27 15:07:44,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 15:07:44,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-27 15:07:44,088 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-27 15:07:44,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:44,089 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-27 15:07:44,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:44,089 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-27 15:07:44,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:44,089 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:44,089 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:44,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:44,293 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:44,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1547284461, now seen corresponding path program 52 times [2019-12-27 15:07:44,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:44,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758340500] [2019-12-27 15:07:44,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:44,349 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 15:07:44,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758340500] [2019-12-27 15:07:44,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929522899] [2019-12-27 15:07:44,350 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 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 15:07:44,392 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:44,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:44,393 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:44,393 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:44,465 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 15:07:44,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:44,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:44,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1656317948] [2019-12-27 15:07:44,466 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:44,467 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:44,469 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:44,469 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:44,470 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:44,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:44,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:44,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:44,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:44,471 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 8 states. [2019-12-27 15:07:44,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:44,588 INFO L93 Difference]: Finished difference Result 142 states and 326 transitions. [2019-12-27 15:07:44,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:44,589 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:44,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:44,590 INFO L225 Difference]: With dead ends: 142 [2019-12-27 15:07:44,590 INFO L226 Difference]: Without dead ends: 141 [2019-12-27 15:07:44,590 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:44,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-27 15:07:44,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 128. [2019-12-27 15:07:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 15:07:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 299 transitions. [2019-12-27 15:07:44,594 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 299 transitions. Word has length 12 [2019-12-27 15:07:44,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:44,594 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 299 transitions. [2019-12-27 15:07:44,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 299 transitions. [2019-12-27 15:07:44,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:44,595 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:44,595 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:44,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:44,799 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:44,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:44,799 INFO L82 PathProgramCache]: Analyzing trace with hash 388808531, now seen corresponding path program 6 times [2019-12-27 15:07:44,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:44,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460784381] [2019-12-27 15:07:44,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:44,885 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 15:07:44,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460784381] [2019-12-27 15:07:44,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54327985] [2019-12-27 15:07:44,886 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 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 15:07:44,929 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 15:07:44,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:44,930 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:44,931 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:45,017 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 15:07:45,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:45,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:45,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2056570702] [2019-12-27 15:07:45,017 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:45,018 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:45,020 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 40 transitions. [2019-12-27 15:07:45,021 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:45,023 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:07:45,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:45,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:45,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:45,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:45,024 INFO L87 Difference]: Start difference. First operand 128 states and 299 transitions. Second operand 9 states. [2019-12-27 15:07:45,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:45,174 INFO L93 Difference]: Finished difference Result 143 states and 324 transitions. [2019-12-27 15:07:45,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:45,175 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-27 15:07:45,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:45,176 INFO L225 Difference]: With dead ends: 143 [2019-12-27 15:07:45,176 INFO L226 Difference]: Without dead ends: 142 [2019-12-27 15:07:45,177 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:07:45,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-27 15:07:45,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 133. [2019-12-27 15:07:45,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 15:07:45,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 313 transitions. [2019-12-27 15:07:45,181 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 313 transitions. Word has length 12 [2019-12-27 15:07:45,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:45,181 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 313 transitions. [2019-12-27 15:07:45,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:45,181 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 313 transitions. [2019-12-27 15:07:45,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:45,182 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:45,182 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:45,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:45,385 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:45,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:45,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1688429421, now seen corresponding path program 53 times [2019-12-27 15:07:45,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:45,387 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962320019] [2019-12-27 15:07:45,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:45,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:45,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962320019] [2019-12-27 15:07:45,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979214583] [2019-12-27 15:07:45,459 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:45,502 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:45,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:45,503 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:45,504 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:45,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:45,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:45,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [7240598] [2019-12-27 15:07:45,634 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:45,635 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:45,637 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 29 transitions. [2019-12-27 15:07:45,637 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:45,638 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:45,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:45,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:45,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:45,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:45,639 INFO L87 Difference]: Start difference. First operand 133 states and 313 transitions. Second operand 9 states. [2019-12-27 15:07:45,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:45,665 INFO L93 Difference]: Finished difference Result 154 states and 348 transitions. [2019-12-27 15:07:45,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:45,666 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:45,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:45,667 INFO L225 Difference]: With dead ends: 154 [2019-12-27 15:07:45,667 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 15:07:45,667 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:45,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 15:07:45,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2019-12-27 15:07:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 15:07:45,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 314 transitions. [2019-12-27 15:07:45,670 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 314 transitions. Word has length 13 [2019-12-27 15:07:45,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:45,671 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 314 transitions. [2019-12-27 15:07:45,671 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:45,671 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 314 transitions. [2019-12-27 15:07:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:45,671 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:45,671 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:45,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:45,875 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:45,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:45,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1688463056, now seen corresponding path program 54 times [2019-12-27 15:07:45,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:45,876 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778939432] [2019-12-27 15:07:45,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:45,961 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 15:07:45,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778939432] [2019-12-27 15:07:45,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001811644] [2019-12-27 15:07:45,962 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 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 15:07:46,007 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:46,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:46,008 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:46,008 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:46,100 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 15:07:46,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:46,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:46,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [536683193] [2019-12-27 15:07:46,102 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:46,103 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:46,105 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 27 transitions. [2019-12-27 15:07:46,105 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:46,106 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:46,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:46,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:46,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:46,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:46,106 INFO L87 Difference]: Start difference. First operand 133 states and 314 transitions. Second operand 9 states. [2019-12-27 15:07:46,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:46,160 INFO L93 Difference]: Finished difference Result 163 states and 369 transitions. [2019-12-27 15:07:46,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:46,161 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:46,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:46,162 INFO L225 Difference]: With dead ends: 163 [2019-12-27 15:07:46,162 INFO L226 Difference]: Without dead ends: 162 [2019-12-27 15:07:46,162 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:46,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-27 15:07:46,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2019-12-27 15:07:46,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 15:07:46,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 318 transitions. [2019-12-27 15:07:46,165 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 318 transitions. Word has length 13 [2019-12-27 15:07:46,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:46,165 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 318 transitions. [2019-12-27 15:07:46,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:46,165 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 318 transitions. [2019-12-27 15:07:46,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:46,166 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:46,166 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:46,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:46,369 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:46,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:46,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1688462901, now seen corresponding path program 55 times [2019-12-27 15:07:46,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:46,371 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062277018] [2019-12-27 15:07:46,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:46,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062277018] [2019-12-27 15:07:46,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834411505] [2019-12-27 15:07:46,460 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 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 15:07:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:46,506 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:46,507 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:47,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:47,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:47,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1744565582] [2019-12-27 15:07:47,678 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:47,679 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:47,681 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 27 transitions. [2019-12-27 15:07:47,681 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:47,681 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:47,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:47,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:47,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:47,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=154, Unknown=2, NotChecked=0, Total=240 [2019-12-27 15:07:47,682 INFO L87 Difference]: Start difference. First operand 134 states and 318 transitions. Second operand 9 states. [2019-12-27 15:07:47,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:47,739 INFO L93 Difference]: Finished difference Result 163 states and 367 transitions. [2019-12-27 15:07:47,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:47,739 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:47,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:47,741 INFO L225 Difference]: With dead ends: 163 [2019-12-27 15:07:47,741 INFO L226 Difference]: Without dead ends: 160 [2019-12-27 15:07:47,741 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=171, Unknown=2, NotChecked=0, Total=272 [2019-12-27 15:07:47,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-27 15:07:47,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 134. [2019-12-27 15:07:47,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 15:07:47,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 317 transitions. [2019-12-27 15:07:47,746 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 317 transitions. Word has length 13 [2019-12-27 15:07:47,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:47,746 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 317 transitions. [2019-12-27 15:07:47,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:47,746 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 317 transitions. [2019-12-27 15:07:47,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:47,747 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:47,747 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:47,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:47,948 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:47,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:47,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505741, now seen corresponding path program 56 times [2019-12-27 15:07:47,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:47,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514748047] [2019-12-27 15:07:47,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:48,013 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 15:07:48,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514748047] [2019-12-27 15:07:48,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818984697] [2019-12-27 15:07:48,013 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 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 15:07:48,059 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:48,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:48,060 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:48,061 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:48,145 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 15:07:48,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:48,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:48,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [509865767] [2019-12-27 15:07:48,146 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:48,147 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:48,149 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:07:48,149 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:48,149 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:48,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:48,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:48,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:48,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:48,150 INFO L87 Difference]: Start difference. First operand 134 states and 317 transitions. Second operand 9 states. [2019-12-27 15:07:48,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:48,224 INFO L93 Difference]: Finished difference Result 167 states and 378 transitions. [2019-12-27 15:07:48,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:48,224 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:48,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:48,226 INFO L225 Difference]: With dead ends: 167 [2019-12-27 15:07:48,226 INFO L226 Difference]: Without dead ends: 166 [2019-12-27 15:07:48,226 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:48,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-27 15:07:48,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 136. [2019-12-27 15:07:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 15:07:48,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 325 transitions. [2019-12-27 15:07:48,230 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 325 transitions. Word has length 13 [2019-12-27 15:07:48,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:48,231 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 325 transitions. [2019-12-27 15:07:48,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:48,231 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 325 transitions. [2019-12-27 15:07:48,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:48,231 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:48,231 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:48,434 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:48,435 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:48,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:48,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505586, now seen corresponding path program 57 times [2019-12-27 15:07:48,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:48,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666242906] [2019-12-27 15:07:48,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:48,512 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 15:07:48,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666242906] [2019-12-27 15:07:48,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303081698] [2019-12-27 15:07:48,513 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 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 15:07:48,558 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:48,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:48,559 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:48,560 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:49,107 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 15:07:49,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:49,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:49,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1753743544] [2019-12-27 15:07:49,108 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:49,109 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:49,111 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:07:49,111 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:49,111 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:49,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:49,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:49,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:49,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=158, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:07:49,112 INFO L87 Difference]: Start difference. First operand 136 states and 325 transitions. Second operand 9 states. [2019-12-27 15:07:49,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:49,189 INFO L93 Difference]: Finished difference Result 175 states and 399 transitions. [2019-12-27 15:07:49,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:49,190 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:49,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:49,191 INFO L225 Difference]: With dead ends: 175 [2019-12-27 15:07:49,191 INFO L226 Difference]: Without dead ends: 174 [2019-12-27 15:07:49,192 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=195, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:07:49,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-27 15:07:49,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 135. [2019-12-27 15:07:49,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 15:07:49,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 321 transitions. [2019-12-27 15:07:49,195 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 321 transitions. Word has length 13 [2019-12-27 15:07:49,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:49,195 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 321 transitions. [2019-12-27 15:07:49,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:49,195 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 321 transitions. [2019-12-27 15:07:49,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:49,196 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:49,196 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:49,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:49,397 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:49,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:49,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500936, now seen corresponding path program 58 times [2019-12-27 15:07:49,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:49,398 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535419223] [2019-12-27 15:07:49,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:49,486 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 15:07:49,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535419223] [2019-12-27 15:07:49,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241855030] [2019-12-27 15:07:49,487 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 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 15:07:49,531 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:49,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:49,532 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:49,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:49,691 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 15:07:49,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:49,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:49,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [535901050] [2019-12-27 15:07:49,692 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:49,693 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:49,695 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:07:49,695 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:49,695 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:49,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:49,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:49,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:49,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:49,696 INFO L87 Difference]: Start difference. First operand 135 states and 321 transitions. Second operand 9 states. [2019-12-27 15:07:50,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:50,122 INFO L93 Difference]: Finished difference Result 172 states and 390 transitions. [2019-12-27 15:07:50,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:50,123 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:50,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:50,124 INFO L225 Difference]: With dead ends: 172 [2019-12-27 15:07:50,124 INFO L226 Difference]: Without dead ends: 171 [2019-12-27 15:07:50,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=193, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:07:50,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-27 15:07:50,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 136. [2019-12-27 15:07:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 15:07:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 325 transitions. [2019-12-27 15:07:50,129 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 325 transitions. Word has length 13 [2019-12-27 15:07:50,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:50,129 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 325 transitions. [2019-12-27 15:07:50,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:50,129 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 325 transitions. [2019-12-27 15:07:50,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:50,129 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:50,130 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:50,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:50,333 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:50,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:50,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500781, now seen corresponding path program 59 times [2019-12-27 15:07:50,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:50,334 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133202460] [2019-12-27 15:07:50,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:50,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133202460] [2019-12-27 15:07:50,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928749025] [2019-12-27 15:07:50,402 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 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 15:07:50,444 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:50,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:50,445 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:50,446 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:50,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:50,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:50,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1484368140] [2019-12-27 15:07:50,605 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:50,605 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:50,607 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:07:50,607 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:50,607 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:50,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:50,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:50,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:50,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:50,608 INFO L87 Difference]: Start difference. First operand 136 states and 325 transitions. Second operand 9 states. [2019-12-27 15:07:50,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:50,705 INFO L93 Difference]: Finished difference Result 166 states and 375 transitions. [2019-12-27 15:07:50,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:50,706 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:50,707 INFO L225 Difference]: With dead ends: 166 [2019-12-27 15:07:50,707 INFO L226 Difference]: Without dead ends: 162 [2019-12-27 15:07:50,707 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:50,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-27 15:07:50,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 135. [2019-12-27 15:07:50,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 15:07:50,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 320 transitions. [2019-12-27 15:07:50,710 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 320 transitions. Word has length 13 [2019-12-27 15:07:50,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:50,710 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 320 transitions. [2019-12-27 15:07:50,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:50,711 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 320 transitions. [2019-12-27 15:07:50,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:50,711 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:50,711 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:50,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:50,914 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:50,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:50,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828976, now seen corresponding path program 60 times [2019-12-27 15:07:50,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:50,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897093486] [2019-12-27 15:07:50,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:50,994 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 15:07:50,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897093486] [2019-12-27 15:07:50,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616348245] [2019-12-27 15:07:50,994 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 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 15:07:51,054 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:51,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:51,056 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:51,057 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:51,188 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 15:07:51,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:51,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:51,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [111324986] [2019-12-27 15:07:51,189 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:51,190 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:51,193 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:51,194 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:51,194 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:51,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:51,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:51,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:51,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:51,195 INFO L87 Difference]: Start difference. First operand 135 states and 320 transitions. Second operand 9 states. [2019-12-27 15:07:51,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:51,328 INFO L93 Difference]: Finished difference Result 165 states and 375 transitions. [2019-12-27 15:07:51,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:51,329 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:51,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:51,330 INFO L225 Difference]: With dead ends: 165 [2019-12-27 15:07:51,330 INFO L226 Difference]: Without dead ends: 164 [2019-12-27 15:07:51,330 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:51,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-12-27 15:07:51,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 138. [2019-12-27 15:07:51,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:07:51,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-27 15:07:51,334 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 13 [2019-12-27 15:07:51,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:51,334 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-27 15:07:51,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:51,335 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-27 15:07:51,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:51,335 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:51,335 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:51,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:51,540 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:51,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:51,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828821, now seen corresponding path program 61 times [2019-12-27 15:07:51,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:51,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642445206] [2019-12-27 15:07:51,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:51,626 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 15:07:51,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642445206] [2019-12-27 15:07:51,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740449204] [2019-12-27 15:07:51,627 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 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 15:07:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:51,677 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:51,678 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:51,827 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 15:07:51,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:51,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:51,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1595964707] [2019-12-27 15:07:51,828 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:51,829 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:51,830 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:51,830 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:51,830 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:51,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:51,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:51,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:51,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:51,831 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 9 states. [2019-12-27 15:07:51,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:51,952 INFO L93 Difference]: Finished difference Result 180 states and 416 transitions. [2019-12-27 15:07:51,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:51,953 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:51,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:51,955 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:07:51,955 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 15:07:51,955 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:51,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 15:07:51,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 137. [2019-12-27 15:07:51,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 15:07:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 328 transitions. [2019-12-27 15:07:51,960 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 328 transitions. Word has length 13 [2019-12-27 15:07:51,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:51,960 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 328 transitions. [2019-12-27 15:07:51,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:51,961 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 328 transitions. [2019-12-27 15:07:51,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:51,961 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:51,961 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:52,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:52,164 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:52,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:52,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824171, now seen corresponding path program 62 times [2019-12-27 15:07:52,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:52,166 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304754187] [2019-12-27 15:07:52,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:52,234 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 15:07:52,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304754187] [2019-12-27 15:07:52,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450688277] [2019-12-27 15:07:52,235 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 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 15:07:52,280 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:52,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:52,280 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:52,281 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:52,396 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 15:07:52,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:52,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:52,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1841772628] [2019-12-27 15:07:52,396 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:52,397 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:52,399 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:52,399 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:52,399 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:52,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:52,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:52,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:52,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:52,400 INFO L87 Difference]: Start difference. First operand 137 states and 328 transitions. Second operand 9 states. [2019-12-27 15:07:52,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:52,555 INFO L93 Difference]: Finished difference Result 182 states and 418 transitions. [2019-12-27 15:07:52,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:52,555 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:52,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:52,556 INFO L225 Difference]: With dead ends: 182 [2019-12-27 15:07:52,557 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:07:52,557 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:52,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:07:52,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 138. [2019-12-27 15:07:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:07:52,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-27 15:07:52,560 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 13 [2019-12-27 15:07:52,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:52,560 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-27 15:07:52,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:52,561 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-27 15:07:52,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:52,561 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:52,561 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:52,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:52,764 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:52,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:52,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824016, now seen corresponding path program 63 times [2019-12-27 15:07:52,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:52,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40782447] [2019-12-27 15:07:52,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:52,840 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 15:07:52,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40782447] [2019-12-27 15:07:52,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482628862] [2019-12-27 15:07:52,841 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 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 15:07:52,888 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:07:52,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:52,889 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:52,889 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:53,032 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 15:07:53,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:53,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:53,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1325554270] [2019-12-27 15:07:53,033 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:53,034 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:53,036 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:53,036 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:53,036 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:53,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:53,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:53,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:53,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:53,037 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 9 states. [2019-12-27 15:07:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:53,146 INFO L93 Difference]: Finished difference Result 178 states and 409 transitions. [2019-12-27 15:07:53,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:53,146 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:53,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:53,148 INFO L225 Difference]: With dead ends: 178 [2019-12-27 15:07:53,148 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 15:07:53,148 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:53,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 15:07:53,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2019-12-27 15:07:53,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 15:07:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 324 transitions. [2019-12-27 15:07:53,152 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 324 transitions. Word has length 13 [2019-12-27 15:07:53,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:53,152 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 324 transitions. [2019-12-27 15:07:53,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:53,152 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 324 transitions. [2019-12-27 15:07:53,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:53,153 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:53,153 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:53,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:53,354 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:53,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:53,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1721680021, now seen corresponding path program 64 times [2019-12-27 15:07:53,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:53,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181584731] [2019-12-27 15:07:53,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:53,440 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 15:07:53,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181584731] [2019-12-27 15:07:53,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683649624] [2019-12-27 15:07:53,441 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 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 15:07:53,484 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:53,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:53,485 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:53,485 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:53,607 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 15:07:53,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:53,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:53,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1572364010] [2019-12-27 15:07:53,607 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:53,608 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:53,610 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:53,610 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:53,610 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:53,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:53,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:53,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:53,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:53,610 INFO L87 Difference]: Start difference. First operand 136 states and 324 transitions. Second operand 9 states. [2019-12-27 15:07:53,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:53,731 INFO L93 Difference]: Finished difference Result 178 states and 408 transitions. [2019-12-27 15:07:53,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:53,732 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:53,733 INFO L225 Difference]: With dead ends: 178 [2019-12-27 15:07:53,734 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 15:07:53,734 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:53,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 15:07:53,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 138. [2019-12-27 15:07:53,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:07:53,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-27 15:07:53,740 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 13 [2019-12-27 15:07:53,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:53,740 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-27 15:07:53,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:53,740 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-27 15:07:53,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:53,741 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:53,741 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:53,944 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:53,944 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:53,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:53,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1721679866, now seen corresponding path program 65 times [2019-12-27 15:07:53,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:53,945 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935992443] [2019-12-27 15:07:53,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:54,011 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 15:07:54,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935992443] [2019-12-27 15:07:54,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731878241] [2019-12-27 15:07:54,011 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 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 15:07:54,057 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:54,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:54,058 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:54,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:54,191 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 15:07:54,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:54,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:54,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [959016205] [2019-12-27 15:07:54,192 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:54,200 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:54,202 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:54,203 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:54,203 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:54,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:54,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:54,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:54,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:54,204 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 9 states. [2019-12-27 15:07:54,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:54,342 INFO L93 Difference]: Finished difference Result 176 states and 404 transitions. [2019-12-27 15:07:54,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:54,343 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:54,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:54,344 INFO L225 Difference]: With dead ends: 176 [2019-12-27 15:07:54,344 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 15:07:54,345 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:54,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 15:07:54,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 137. [2019-12-27 15:07:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 15:07:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 328 transitions. [2019-12-27 15:07:54,348 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 328 transitions. Word has length 13 [2019-12-27 15:07:54,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:54,348 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 328 transitions. [2019-12-27 15:07:54,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 328 transitions. [2019-12-27 15:07:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:54,349 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:54,349 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:54,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:54,552 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:54,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:54,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675216, now seen corresponding path program 66 times [2019-12-27 15:07:54,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:54,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828824208] [2019-12-27 15:07:54,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:54,630 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 15:07:54,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828824208] [2019-12-27 15:07:54,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090396626] [2019-12-27 15:07:54,631 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 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 15:07:54,673 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:54,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:54,674 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:54,674 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:54,837 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 15:07:54,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:54,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:54,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [665902152] [2019-12-27 15:07:54,838 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:54,839 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:54,840 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:54,840 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:54,840 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:54,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:54,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:54,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:54,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:54,841 INFO L87 Difference]: Start difference. First operand 137 states and 328 transitions. Second operand 9 states. [2019-12-27 15:07:54,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:54,976 INFO L93 Difference]: Finished difference Result 175 states and 400 transitions. [2019-12-27 15:07:54,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:54,978 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:54,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:54,979 INFO L225 Difference]: With dead ends: 175 [2019-12-27 15:07:54,979 INFO L226 Difference]: Without dead ends: 174 [2019-12-27 15:07:54,980 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=218, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:54,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-27 15:07:54,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 138. [2019-12-27 15:07:54,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:07:54,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-27 15:07:54,983 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 13 [2019-12-27 15:07:54,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:54,983 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-27 15:07:54,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-27 15:07:54,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:54,984 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:54,984 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:55,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:55,187 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:55,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:55,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675061, now seen corresponding path program 67 times [2019-12-27 15:07:55,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:55,188 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334713346] [2019-12-27 15:07:55,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:55,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334713346] [2019-12-27 15:07:55,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263226863] [2019-12-27 15:07:55,254 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 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 15:07:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:55,298 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:55,298 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:55,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:55,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:55,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1881877953] [2019-12-27 15:07:55,472 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:55,474 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:55,476 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:55,476 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:55,476 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:55,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:55,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:55,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:55,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:55,477 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 9 states. [2019-12-27 15:07:55,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:55,590 INFO L93 Difference]: Finished difference Result 167 states and 381 transitions. [2019-12-27 15:07:55,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:55,590 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:55,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:55,592 INFO L225 Difference]: With dead ends: 167 [2019-12-27 15:07:55,592 INFO L226 Difference]: Without dead ends: 162 [2019-12-27 15:07:55,592 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:55,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-27 15:07:55,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 136. [2019-12-27 15:07:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 15:07:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 323 transitions. [2019-12-27 15:07:55,596 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 323 transitions. Word has length 13 [2019-12-27 15:07:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:55,596 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 323 transitions. [2019-12-27 15:07:55,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:55,597 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 323 transitions. [2019-12-27 15:07:55,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:55,597 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:55,597 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:55,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:55,798 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:55,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:55,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118035, now seen corresponding path program 68 times [2019-12-27 15:07:55,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:55,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468538937] [2019-12-27 15:07:55,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:55,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468538937] [2019-12-27 15:07:55,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517097177] [2019-12-27 15:07:55,887 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 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 15:07:55,933 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:55,934 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:55,934 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:55,935 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:56,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:56,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:56,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:56,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1033454782] [2019-12-27 15:07:56,019 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:56,020 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:56,021 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:07:56,021 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:56,021 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:56,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:56,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:56,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:56,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:56,022 INFO L87 Difference]: Start difference. First operand 136 states and 323 transitions. Second operand 9 states. [2019-12-27 15:07:56,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:56,136 INFO L93 Difference]: Finished difference Result 162 states and 365 transitions. [2019-12-27 15:07:56,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:56,137 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:56,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:56,138 INFO L225 Difference]: With dead ends: 162 [2019-12-27 15:07:56,138 INFO L226 Difference]: Without dead ends: 161 [2019-12-27 15:07:56,139 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:07:56,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-27 15:07:56,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 141. [2019-12-27 15:07:56,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:07:56,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 15:07:56,143 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-27 15:07:56,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:56,143 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 15:07:56,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:56,144 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 15:07:56,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:56,144 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:56,144 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:56,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:56,348 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:56,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:56,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118190, now seen corresponding path program 69 times [2019-12-27 15:07:56,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:56,349 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992947291] [2019-12-27 15:07:56,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:56,428 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 15:07:56,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992947291] [2019-12-27 15:07:56,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657374494] [2019-12-27 15:07:56,429 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 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 15:07:56,474 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:07:56,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:56,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:56,475 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:56,563 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 15:07:56,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:56,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:56,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1456891627] [2019-12-27 15:07:56,565 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:56,566 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:56,568 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:07:56,568 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:56,568 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:56,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:56,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:56,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:56,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:56,569 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 9 states. [2019-12-27 15:07:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:56,722 INFO L93 Difference]: Finished difference Result 176 states and 405 transitions. [2019-12-27 15:07:56,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:56,722 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:56,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:56,724 INFO L225 Difference]: With dead ends: 176 [2019-12-27 15:07:56,724 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 15:07:56,724 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:07:56,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 15:07:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 140. [2019-12-27 15:07:56,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:07:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 336 transitions. [2019-12-27 15:07:56,728 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 336 transitions. Word has length 13 [2019-12-27 15:07:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:56,728 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 336 transitions. [2019-12-27 15:07:56,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 336 transitions. [2019-12-27 15:07:56,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:56,729 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:56,729 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:56,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:56,931 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:56,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:56,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122840, now seen corresponding path program 70 times [2019-12-27 15:07:56,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:56,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089448093] [2019-12-27 15:07:56,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:56,998 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 15:07:56,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089448093] [2019-12-27 15:07:56,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518762662] [2019-12-27 15:07:56,999 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:07:57,045 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:57,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:57,046 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:57,046 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:57,138 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 15:07:57,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:57,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:57,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [929978972] [2019-12-27 15:07:57,138 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:57,139 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:57,141 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:07:57,141 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:57,141 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:57,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:57,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:57,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:57,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:57,141 INFO L87 Difference]: Start difference. First operand 140 states and 336 transitions. Second operand 9 states. [2019-12-27 15:07:57,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:57,349 INFO L93 Difference]: Finished difference Result 181 states and 416 transitions. [2019-12-27 15:07:57,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:57,350 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:57,351 INFO L225 Difference]: With dead ends: 181 [2019-12-27 15:07:57,352 INFO L226 Difference]: Without dead ends: 180 [2019-12-27 15:07:57,352 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:07:57,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-12-27 15:07:57,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 141. [2019-12-27 15:07:57,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:07:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 15:07:57,355 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-27 15:07:57,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:57,356 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 15:07:57,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:57,356 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 15:07:57,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:57,356 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:57,357 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:57,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:57,560 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:57,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:57,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122995, now seen corresponding path program 71 times [2019-12-27 15:07:57,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:57,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916849399] [2019-12-27 15:07:57,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:57,629 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 15:07:57,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916849399] [2019-12-27 15:07:57,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473690850] [2019-12-27 15:07:57,630 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 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 15:07:57,673 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:57,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:57,675 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:57,675 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:57,766 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 15:07:57,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:57,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:57,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1895815202] [2019-12-27 15:07:57,767 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:57,768 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:57,770 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:07:57,770 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:57,770 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:57,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:57,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:57,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:57,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:57,771 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 9 states. [2019-12-27 15:07:57,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:57,902 INFO L93 Difference]: Finished difference Result 179 states and 413 transitions. [2019-12-27 15:07:57,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:57,902 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:57,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:57,904 INFO L225 Difference]: With dead ends: 179 [2019-12-27 15:07:57,904 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 15:07:57,904 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:07:57,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 15:07:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 139. [2019-12-27 15:07:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 15:07:57,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 332 transitions. [2019-12-27 15:07:57,907 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 332 transitions. Word has length 13 [2019-12-27 15:07:57,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:57,907 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 332 transitions. [2019-12-27 15:07:57,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:57,908 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 332 transitions. [2019-12-27 15:07:57,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:57,908 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:57,908 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:58,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:58,109 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:58,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:58,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1571266990, now seen corresponding path program 72 times [2019-12-27 15:07:58,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:58,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844936169] [2019-12-27 15:07:58,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:58,188 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 15:07:58,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844936169] [2019-12-27 15:07:58,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504633656] [2019-12-27 15:07:58,189 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 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 15:07:58,256 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:58,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:58,258 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:58,259 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:59,074 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:07:59,075 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 15:07:59,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:59,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:59,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1154687094] [2019-12-27 15:07:59,075 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:59,076 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:59,078 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:07:59,078 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:59,078 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:59,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:59,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:59,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:59,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=165, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:07:59,079 INFO L87 Difference]: Start difference. First operand 139 states and 332 transitions. Second operand 9 states. [2019-12-27 15:08:00,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:00,375 INFO L93 Difference]: Finished difference Result 186 states and 427 transitions. [2019-12-27 15:08:00,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:00,375 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:00,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:00,377 INFO L225 Difference]: With dead ends: 186 [2019-12-27 15:08:00,377 INFO L226 Difference]: Without dead ends: 185 [2019-12-27 15:08:00,377 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=128, Invalid=250, Unknown=2, NotChecked=0, Total=380 [2019-12-27 15:08:00,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-27 15:08:00,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 141. [2019-12-27 15:08:00,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:00,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 15:08:00,382 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-27 15:08:00,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:00,382 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 15:08:00,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:00,382 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 15:08:00,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:00,382 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:00,383 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:00,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:00,586 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:00,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:00,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1571267145, now seen corresponding path program 73 times [2019-12-27 15:08:00,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:00,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245195257] [2019-12-27 15:08:00,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:00,656 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 15:08:00,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245195257] [2019-12-27 15:08:00,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193748705] [2019-12-27 15:08:00,657 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 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 15:08:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:00,700 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:00,701 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:00,815 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 15:08:00,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:00,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:00,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1939495610] [2019-12-27 15:08:00,817 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:00,818 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:00,820 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:00,820 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:00,820 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:00,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:00,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:00,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:00,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:00,821 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 9 states. [2019-12-27 15:08:01,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:01,385 INFO L93 Difference]: Finished difference Result 183 states and 423 transitions. [2019-12-27 15:08:01,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:01,386 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:01,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:01,387 INFO L225 Difference]: With dead ends: 183 [2019-12-27 15:08:01,387 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 15:08:01,388 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=250, Unknown=1, NotChecked=0, Total=380 [2019-12-27 15:08:01,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 15:08:01,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 140. [2019-12-27 15:08:01,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:01,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 336 transitions. [2019-12-27 15:08:01,391 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 336 transitions. Word has length 13 [2019-12-27 15:08:01,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:01,392 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 336 transitions. [2019-12-27 15:08:01,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:01,392 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 336 transitions. [2019-12-27 15:08:01,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:01,393 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:01,393 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:01,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:01,596 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:01,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:01,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271795, now seen corresponding path program 74 times [2019-12-27 15:08:01,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:01,598 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953113210] [2019-12-27 15:08:01,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:01,663 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 15:08:01,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953113210] [2019-12-27 15:08:01,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529810743] [2019-12-27 15:08:01,664 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 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 15:08:01,709 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:01,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:01,710 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:01,711 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:01,817 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 15:08:01,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:01,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:01,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1807828884] [2019-12-27 15:08:01,818 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:01,819 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:01,820 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:01,820 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:01,820 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:01,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:01,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:01,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:01,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:01,821 INFO L87 Difference]: Start difference. First operand 140 states and 336 transitions. Second operand 9 states. [2019-12-27 15:08:01,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:01,975 INFO L93 Difference]: Finished difference Result 185 states and 427 transitions. [2019-12-27 15:08:01,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:01,975 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:01,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:01,977 INFO L225 Difference]: With dead ends: 185 [2019-12-27 15:08:01,977 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:08:01,977 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:01,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:08:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 141. [2019-12-27 15:08:01,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:01,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 15:08:01,981 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-27 15:08:01,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:01,981 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 15:08:01,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:01,981 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 15:08:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:01,981 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:01,981 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:02,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:02,182 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:02,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:02,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271950, now seen corresponding path program 75 times [2019-12-27 15:08:02,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:02,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838694786] [2019-12-27 15:08:02,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:02,252 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 15:08:02,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838694786] [2019-12-27 15:08:02,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508729794] [2019-12-27 15:08:02,253 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 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 15:08:02,297 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:02,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:02,298 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:02,299 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:02,395 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 15:08:02,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:02,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:02,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [365404503] [2019-12-27 15:08:02,396 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:02,397 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:02,399 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:02,399 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:02,399 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:02,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:02,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:02,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:02,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:02,400 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 9 states. [2019-12-27 15:08:02,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:02,521 INFO L93 Difference]: Finished difference Result 177 states and 409 transitions. [2019-12-27 15:08:02,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:02,521 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:02,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:02,523 INFO L225 Difference]: With dead ends: 177 [2019-12-27 15:08:02,523 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 15:08:02,523 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:02,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 15:08:02,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 138. [2019-12-27 15:08:02,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:08:02,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 328 transitions. [2019-12-27 15:08:02,527 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 328 transitions. Word has length 13 [2019-12-27 15:08:02,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:02,528 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 328 transitions. [2019-12-27 15:08:02,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:02,528 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 328 transitions. [2019-12-27 15:08:02,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:02,528 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:02,528 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:02,728 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:02,729 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:02,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:02,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735640, now seen corresponding path program 76 times [2019-12-27 15:08:02,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:02,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89291333] [2019-12-27 15:08:02,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:02,799 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 15:08:02,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89291333] [2019-12-27 15:08:02,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190409003] [2019-12-27 15:08:02,800 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 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 15:08:02,842 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:02,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:02,843 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:02,846 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:02,920 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 15:08:02,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:02,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:02,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [612908618] [2019-12-27 15:08:02,921 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:02,922 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:02,923 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:02,924 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:02,924 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:02,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:02,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:02,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:02,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:02,924 INFO L87 Difference]: Start difference. First operand 138 states and 328 transitions. Second operand 9 states. [2019-12-27 15:08:03,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:03,044 INFO L93 Difference]: Finished difference Result 183 states and 418 transitions. [2019-12-27 15:08:03,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:03,045 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:03,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:03,046 INFO L225 Difference]: With dead ends: 183 [2019-12-27 15:08:03,046 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 15:08:03,047 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:03,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 15:08:03,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 141. [2019-12-27 15:08:03,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:03,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 15:08:03,050 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-27 15:08:03,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:03,050 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 15:08:03,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:03,051 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 15:08:03,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:03,051 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:03,051 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:03,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:03,252 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:03,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:03,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735795, now seen corresponding path program 77 times [2019-12-27 15:08:03,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:03,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820876827] [2019-12-27 15:08:03,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:03,320 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 15:08:03,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820876827] [2019-12-27 15:08:03,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582932798] [2019-12-27 15:08:03,320 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 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 15:08:03,363 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:03,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:03,364 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:03,365 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:03,446 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 15:08:03,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:03,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:03,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [909975229] [2019-12-27 15:08:03,447 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:03,449 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:03,450 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:03,450 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:03,450 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:03,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:03,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:03,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:03,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:03,451 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 9 states. [2019-12-27 15:08:03,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:03,601 INFO L93 Difference]: Finished difference Result 185 states and 428 transitions. [2019-12-27 15:08:03,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:03,601 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:03,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:03,603 INFO L225 Difference]: With dead ends: 185 [2019-12-27 15:08:03,603 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:08:03,604 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:03,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:08:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 140. [2019-12-27 15:08:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 336 transitions. [2019-12-27 15:08:03,607 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 336 transitions. Word has length 13 [2019-12-27 15:08:03,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:03,608 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 336 transitions. [2019-12-27 15:08:03,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:03,608 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 336 transitions. [2019-12-27 15:08:03,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:03,608 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:03,608 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:03,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:03,809 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:03,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740445, now seen corresponding path program 78 times [2019-12-27 15:08:03,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:03,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316356775] [2019-12-27 15:08:03,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:03,885 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 15:08:03,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316356775] [2019-12-27 15:08:03,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495237509] [2019-12-27 15:08:03,885 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 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 15:08:03,930 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:03,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:03,931 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:03,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:04,046 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 15:08:04,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:04,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:04,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1227233207] [2019-12-27 15:08:04,047 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:04,048 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:04,050 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:04,050 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:04,050 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:04,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:04,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:04,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:04,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:04,051 INFO L87 Difference]: Start difference. First operand 140 states and 336 transitions. Second operand 9 states. [2019-12-27 15:08:04,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:04,188 INFO L93 Difference]: Finished difference Result 184 states and 424 transitions. [2019-12-27 15:08:04,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:04,189 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:04,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:04,191 INFO L225 Difference]: With dead ends: 184 [2019-12-27 15:08:04,191 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 15:08:04,191 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:04,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 15:08:04,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 141. [2019-12-27 15:08:04,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 15:08:04,194 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-27 15:08:04,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:04,194 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 15:08:04,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:04,195 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 15:08:04,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:04,195 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:04,195 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:04,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:04,396 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:04,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:04,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740600, now seen corresponding path program 79 times [2019-12-27 15:08:04,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:04,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057418216] [2019-12-27 15:08:04,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:04,465 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 15:08:04,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057418216] [2019-12-27 15:08:04,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388405229] [2019-12-27 15:08:04,466 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 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 15:08:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:04,506 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:04,507 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:04,596 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 15:08:04,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:04,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:04,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2065616668] [2019-12-27 15:08:04,597 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:04,598 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:04,599 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:04,599 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:04,599 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:04,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:04,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:04,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:04,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:04,600 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 9 states. [2019-12-27 15:08:04,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:04,735 INFO L93 Difference]: Finished difference Result 182 states and 422 transitions. [2019-12-27 15:08:04,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:04,735 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:04,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:04,737 INFO L225 Difference]: With dead ends: 182 [2019-12-27 15:08:04,737 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:08:04,737 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:04,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:08:04,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 139. [2019-12-27 15:08:04,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 15:08:04,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 332 transitions. [2019-12-27 15:08:04,741 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 332 transitions. Word has length 13 [2019-12-27 15:08:04,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:04,741 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 332 transitions. [2019-12-27 15:08:04,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:04,741 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 332 transitions. [2019-12-27 15:08:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:04,741 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:04,741 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:04,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:04,942 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:04,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:04,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884595, now seen corresponding path program 80 times [2019-12-27 15:08:04,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:04,943 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951732603] [2019-12-27 15:08:04,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:05,025 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 15:08:05,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951732603] [2019-12-27 15:08:05,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58651361] [2019-12-27 15:08:05,026 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 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 15:08:05,068 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:05,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:05,069 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:05,069 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:05,165 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 15:08:05,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:05,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:05,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2110411083] [2019-12-27 15:08:05,166 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:05,167 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:05,168 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:05,169 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:05,169 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:05,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:05,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:05,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:05,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:05,170 INFO L87 Difference]: Start difference. First operand 139 states and 332 transitions. Second operand 9 states. [2019-12-27 15:08:05,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:05,311 INFO L93 Difference]: Finished difference Result 187 states and 430 transitions. [2019-12-27 15:08:05,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:05,312 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:05,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:05,313 INFO L225 Difference]: With dead ends: 187 [2019-12-27 15:08:05,314 INFO L226 Difference]: Without dead ends: 186 [2019-12-27 15:08:05,314 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:05,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-27 15:08:05,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 141. [2019-12-27 15:08:05,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:05,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 15:08:05,317 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-27 15:08:05,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:05,318 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 15:08:05,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:05,318 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 15:08:05,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:05,318 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:05,318 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:05,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:05,519 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:05,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:05,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884750, now seen corresponding path program 81 times [2019-12-27 15:08:05,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:05,520 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422070681] [2019-12-27 15:08:05,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:05,598 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 15:08:05,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422070681] [2019-12-27 15:08:05,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869348472] [2019-12-27 15:08:05,598 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 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 15:08:05,642 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:08:05,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:05,643 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:05,644 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:06,001 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 15:08:06,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:06,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:06,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [276644880] [2019-12-27 15:08:06,002 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:06,003 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:06,005 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:06,005 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:06,005 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:06,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:06,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:06,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:06,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:06,006 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 9 states. [2019-12-27 15:08:06,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:06,329 INFO L93 Difference]: Finished difference Result 185 states and 428 transitions. [2019-12-27 15:08:06,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:06,330 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:06,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:06,331 INFO L225 Difference]: With dead ends: 185 [2019-12-27 15:08:06,331 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:08:06,332 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:06,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:08:06,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 140. [2019-12-27 15:08:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:06,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 336 transitions. [2019-12-27 15:08:06,335 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 336 transitions. Word has length 13 [2019-12-27 15:08:06,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:06,335 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 336 transitions. [2019-12-27 15:08:06,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:06,336 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 336 transitions. [2019-12-27 15:08:06,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:06,336 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:06,336 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:06,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:06,537 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:06,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:06,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1575889400, now seen corresponding path program 82 times [2019-12-27 15:08:06,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:06,538 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552873913] [2019-12-27 15:08:06,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:06,607 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 15:08:06,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552873913] [2019-12-27 15:08:06,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858668720] [2019-12-27 15:08:06,608 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 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 15:08:06,650 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:06,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:06,650 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:06,651 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:06,747 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 15:08:06,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:06,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:06,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1476345769] [2019-12-27 15:08:06,748 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:06,749 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:06,751 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:06,751 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:06,751 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:06,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:06,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:06,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:06,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:06,752 INFO L87 Difference]: Start difference. First operand 140 states and 336 transitions. Second operand 9 states. [2019-12-27 15:08:06,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:06,902 INFO L93 Difference]: Finished difference Result 178 states and 410 transitions. [2019-12-27 15:08:06,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:06,902 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:06,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:06,903 INFO L225 Difference]: With dead ends: 178 [2019-12-27 15:08:06,903 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 15:08:06,904 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:06,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 15:08:06,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 141. [2019-12-27 15:08:06,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:06,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 15:08:06,908 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-27 15:08:06,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:06,908 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 15:08:06,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:06,908 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 15:08:06,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:06,908 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:06,908 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:07,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:07,109 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:07,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:07,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1575889555, now seen corresponding path program 83 times [2019-12-27 15:08:07,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:07,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193245327] [2019-12-27 15:08:07,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:07,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193245327] [2019-12-27 15:08:07,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968377623] [2019-12-27 15:08:07,184 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 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 15:08:07,228 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:07,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:07,229 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:07,230 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:07,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:07,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:07,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1717893187] [2019-12-27 15:08:07,326 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:07,327 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:07,328 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:07,328 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:07,329 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:07,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:07,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:07,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:07,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:07,329 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 9 states. [2019-12-27 15:08:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:07,450 INFO L93 Difference]: Finished difference Result 163 states and 376 transitions. [2019-12-27 15:08:07,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:07,451 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:07,453 INFO L225 Difference]: With dead ends: 163 [2019-12-27 15:08:07,453 INFO L226 Difference]: Without dead ends: 157 [2019-12-27 15:08:07,453 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:07,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-12-27 15:08:07,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 138. [2019-12-27 15:08:07,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:08:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-27 15:08:07,456 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-27 15:08:07,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:07,456 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-27 15:08:07,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:07,456 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-27 15:08:07,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:07,456 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:07,456 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:07,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:07,657 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:07,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:07,658 INFO L82 PathProgramCache]: Analyzing trace with hash -573260427, now seen corresponding path program 84 times [2019-12-27 15:08:07,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:07,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713299892] [2019-12-27 15:08:07,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:07,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713299892] [2019-12-27 15:08:07,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3191284] [2019-12-27 15:08:07,738 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 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 15:08:07,780 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:07,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:07,781 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 15:08:07,782 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:07,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:07,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:07,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [855203528] [2019-12-27 15:08:07,874 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:07,876 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:07,879 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 49 transitions. [2019-12-27 15:08:07,879 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:07,885 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 15 times. [2019-12-27 15:08:07,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:07,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:07,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:07,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:07,886 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 9 states. [2019-12-27 15:08:08,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:08,042 INFO L93 Difference]: Finished difference Result 168 states and 378 transitions. [2019-12-27 15:08:08,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:08,042 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:08,044 INFO L225 Difference]: With dead ends: 168 [2019-12-27 15:08:08,044 INFO L226 Difference]: Without dead ends: 167 [2019-12-27 15:08:08,044 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:08,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-12-27 15:08:08,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 138. [2019-12-27 15:08:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:08:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-27 15:08:08,048 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-27 15:08:08,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:08,048 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-27 15:08:08,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:08,048 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-27 15:08:08,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:08,049 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:08,049 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:08,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:08,251 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:08,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:08,252 INFO L82 PathProgramCache]: Analyzing trace with hash -573265077, now seen corresponding path program 85 times [2019-12-27 15:08:08,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:08,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526982687] [2019-12-27 15:08:08,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:08,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526982687] [2019-12-27 15:08:08,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009086476] [2019-12-27 15:08:08,327 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 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 15:08:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:08,370 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:08,371 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:08,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:08,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:08,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [934766796] [2019-12-27 15:08:08,478 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:08,479 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:08,489 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 43 transitions. [2019-12-27 15:08:08,489 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:08,492 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:08:08,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:08,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:08,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:08,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:08,493 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 9 states. [2019-12-27 15:08:08,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:08,687 INFO L93 Difference]: Finished difference Result 176 states and 395 transitions. [2019-12-27 15:08:08,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:08,687 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:08,689 INFO L225 Difference]: With dead ends: 176 [2019-12-27 15:08:08,689 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 15:08:08,689 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:08,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 15:08:08,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 139. [2019-12-27 15:08:08,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 15:08:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 331 transitions. [2019-12-27 15:08:08,693 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 331 transitions. Word has length 13 [2019-12-27 15:08:08,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:08,694 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 331 transitions. [2019-12-27 15:08:08,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:08,694 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 331 transitions. [2019-12-27 15:08:08,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:08,694 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:08,695 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:08,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:08,898 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:08,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:08,898 INFO L82 PathProgramCache]: Analyzing trace with hash -573265232, now seen corresponding path program 86 times [2019-12-27 15:08:08,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:08,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092071840] [2019-12-27 15:08:08,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:08,971 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 15:08:08,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092071840] [2019-12-27 15:08:08,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944371804] [2019-12-27 15:08:08,971 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 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 15:08:09,016 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:09,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:09,017 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:09,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:09,114 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 15:08:09,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:09,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:09,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [133790587] [2019-12-27 15:08:09,115 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:09,115 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:09,117 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 43 transitions. [2019-12-27 15:08:09,118 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:09,120 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:08:09,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:09,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:09,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:09,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:09,121 INFO L87 Difference]: Start difference. First operand 139 states and 331 transitions. Second operand 9 states. [2019-12-27 15:08:09,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:09,284 INFO L93 Difference]: Finished difference Result 174 states and 392 transitions. [2019-12-27 15:08:09,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:09,284 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:09,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:09,286 INFO L225 Difference]: With dead ends: 174 [2019-12-27 15:08:09,286 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 15:08:09,286 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:09,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 15:08:09,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 138. [2019-12-27 15:08:09,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:08:09,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-27 15:08:09,290 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-27 15:08:09,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:09,291 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-27 15:08:09,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:09,291 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-27 15:08:09,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:09,291 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:09,292 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:09,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:09,495 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:09,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:09,496 INFO L82 PathProgramCache]: Analyzing trace with hash -573409227, now seen corresponding path program 87 times [2019-12-27 15:08:09,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:09,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340808293] [2019-12-27 15:08:09,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:09,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340808293] [2019-12-27 15:08:09,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426526132] [2019-12-27 15:08:09,571 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 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 15:08:09,623 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:09,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:09,624 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:09,625 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:09,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:09,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:09,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1641504103] [2019-12-27 15:08:09,732 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:09,733 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:09,735 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:08:09,736 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:09,738 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:08:09,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:09,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:09,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:09,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:09,739 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 9 states. [2019-12-27 15:08:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:11,123 INFO L93 Difference]: Finished difference Result 183 states and 411 transitions. [2019-12-27 15:08:11,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:11,123 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:11,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:11,125 INFO L225 Difference]: With dead ends: 183 [2019-12-27 15:08:11,125 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 15:08:11,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=134, Invalid=285, Unknown=1, NotChecked=0, Total=420 [2019-12-27 15:08:11,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 15:08:11,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 140. [2019-12-27 15:08:11,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-27 15:08:11,129 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-27 15:08:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:11,129 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-27 15:08:11,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-27 15:08:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:11,130 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:11,130 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:11,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:11,331 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:11,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:11,331 INFO L82 PathProgramCache]: Analyzing trace with hash -573409382, now seen corresponding path program 88 times [2019-12-27 15:08:11,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:11,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669106316] [2019-12-27 15:08:11,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:11,415 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 15:08:11,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669106316] [2019-12-27 15:08:11,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908284846] [2019-12-27 15:08:11,415 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 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 15:08:11,467 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:11,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:11,468 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:11,468 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:12,554 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 15:08:12,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:12,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:12,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [116999853] [2019-12-27 15:08:12,555 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:12,555 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:12,557 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:08:12,558 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:12,559 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:08:12,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:12,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:12,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:12,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=169, Unknown=2, NotChecked=0, Total=240 [2019-12-27 15:08:12,560 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 9 states. [2019-12-27 15:08:13,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:13,185 INFO L93 Difference]: Finished difference Result 182 states and 412 transitions. [2019-12-27 15:08:13,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:13,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:13,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:13,188 INFO L225 Difference]: With dead ends: 182 [2019-12-27 15:08:13,188 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:08:13,188 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=132, Invalid=285, Unknown=3, NotChecked=0, Total=420 [2019-12-27 15:08:13,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:08:13,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 139. [2019-12-27 15:08:13,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 15:08:13,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 331 transitions. [2019-12-27 15:08:13,191 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 331 transitions. Word has length 13 [2019-12-27 15:08:13,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:13,192 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 331 transitions. [2019-12-27 15:08:13,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:13,192 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 331 transitions. [2019-12-27 15:08:13,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:13,192 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:13,193 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:13,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:13,396 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:13,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:13,396 INFO L82 PathProgramCache]: Analyzing trace with hash -573414032, now seen corresponding path program 89 times [2019-12-27 15:08:13,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:13,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432056365] [2019-12-27 15:08:13,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:13,476 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 15:08:13,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432056365] [2019-12-27 15:08:13,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881511653] [2019-12-27 15:08:13,476 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 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 15:08:13,523 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:13,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:13,524 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:13,524 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:14,084 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 15:08:14,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:14,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:14,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1007579346] [2019-12-27 15:08:14,085 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:14,086 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:14,089 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:08:14,089 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:14,091 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:08:14,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:14,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:14,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:14,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:14,092 INFO L87 Difference]: Start difference. First operand 139 states and 331 transitions. Second operand 9 states. [2019-12-27 15:08:14,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:14,275 INFO L93 Difference]: Finished difference Result 186 states and 421 transitions. [2019-12-27 15:08:14,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:14,276 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:14,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:14,277 INFO L225 Difference]: With dead ends: 186 [2019-12-27 15:08:14,277 INFO L226 Difference]: Without dead ends: 185 [2019-12-27 15:08:14,277 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-27 15:08:14,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2019-12-27 15:08:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-27 15:08:14,281 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-27 15:08:14,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:14,282 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-27 15:08:14,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-27 15:08:14,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:14,282 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:14,282 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:14,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:14,484 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:14,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:14,485 INFO L82 PathProgramCache]: Analyzing trace with hash -573414187, now seen corresponding path program 90 times [2019-12-27 15:08:14,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:14,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039443436] [2019-12-27 15:08:14,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:14,579 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 15:08:14,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039443436] [2019-12-27 15:08:14,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479286895] [2019-12-27 15:08:14,579 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 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 15:08:14,620 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:08:14,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:14,621 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:14,621 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:14,721 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 15:08:14,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:14,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:14,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2027253522] [2019-12-27 15:08:14,722 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:14,724 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:14,726 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:08:14,726 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:14,727 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:08:14,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:14,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:14,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:14,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:14,728 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 9 states. [2019-12-27 15:08:14,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:14,878 INFO L93 Difference]: Finished difference Result 177 states and 400 transitions. [2019-12-27 15:08:14,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:14,879 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:14,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:14,880 INFO L225 Difference]: With dead ends: 177 [2019-12-27 15:08:14,880 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 15:08:14,880 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:14,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 15:08:14,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 138. [2019-12-27 15:08:14,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:08:14,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-27 15:08:14,884 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-27 15:08:14,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:14,884 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-27 15:08:14,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:14,884 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-27 15:08:14,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:14,885 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:14,885 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:15,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:15,088 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:15,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:15,089 INFO L82 PathProgramCache]: Analyzing trace with hash -577877877, now seen corresponding path program 91 times [2019-12-27 15:08:15,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:15,089 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891267448] [2019-12-27 15:08:15,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:15,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891267448] [2019-12-27 15:08:15,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172561963] [2019-12-27 15:08:15,152 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 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 15:08:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:15,195 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:15,195 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:15,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:15,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:15,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:15,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [947301093] [2019-12-27 15:08:15,335 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:15,336 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:15,338 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:15,338 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:15,339 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:15,340 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:15,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:15,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:15,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:15,340 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 9 states. [2019-12-27 15:08:15,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:15,541 INFO L93 Difference]: Finished difference Result 182 states and 407 transitions. [2019-12-27 15:08:15,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:15,541 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:15,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:15,542 INFO L225 Difference]: With dead ends: 182 [2019-12-27 15:08:15,542 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:08:15,542 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:15,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:08:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 141. [2019-12-27 15:08:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-27 15:08:15,545 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-27 15:08:15,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:15,545 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-27 15:08:15,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:15,545 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-27 15:08:15,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:15,546 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:15,546 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:15,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:15,746 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:15,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:15,747 INFO L82 PathProgramCache]: Analyzing trace with hash -577878032, now seen corresponding path program 92 times [2019-12-27 15:08:15,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:15,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056016732] [2019-12-27 15:08:15,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:15,818 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 15:08:15,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056016732] [2019-12-27 15:08:15,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613575951] [2019-12-27 15:08:15,818 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 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 15:08:15,867 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:15,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:15,869 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:15,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:20,040 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 15:08:20,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:20,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:20,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1540626348] [2019-12-27 15:08:20,040 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:20,041 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:20,043 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:20,043 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:20,044 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:20,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:20,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:20,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:20,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=170, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:08:20,045 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 9 states. [2019-12-27 15:08:22,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:22,330 INFO L93 Difference]: Finished difference Result 184 states and 417 transitions. [2019-12-27 15:08:22,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:22,330 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:22,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:22,331 INFO L225 Difference]: With dead ends: 184 [2019-12-27 15:08:22,331 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 15:08:22,332 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=148, Invalid=312, Unknown=2, NotChecked=0, Total=462 [2019-12-27 15:08:22,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 15:08:22,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2019-12-27 15:08:22,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:22,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-27 15:08:22,342 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-27 15:08:22,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:22,342 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-27 15:08:22,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:22,342 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-27 15:08:22,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:22,342 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:22,342 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:22,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:22,543 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:22,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:22,544 INFO L82 PathProgramCache]: Analyzing trace with hash -577882682, now seen corresponding path program 93 times [2019-12-27 15:08:22,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:22,545 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153505832] [2019-12-27 15:08:22,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:22,618 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 15:08:22,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153505832] [2019-12-27 15:08:22,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210735183] [2019-12-27 15:08:22,618 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 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 15:08:22,662 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:22,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:22,664 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:22,664 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:22,782 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 15:08:22,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:22,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:22,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1074522669] [2019-12-27 15:08:22,783 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:22,784 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:22,786 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:22,786 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:22,788 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:22,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:22,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:22,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:22,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:22,788 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 9 states. [2019-12-27 15:08:23,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:23,049 INFO L93 Difference]: Finished difference Result 182 states and 409 transitions. [2019-12-27 15:08:23,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:23,050 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:23,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:23,051 INFO L225 Difference]: With dead ends: 182 [2019-12-27 15:08:23,051 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:08:23,051 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:23,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:08:23,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 141. [2019-12-27 15:08:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:23,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-27 15:08:23,055 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-27 15:08:23,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:23,056 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-27 15:08:23,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:23,056 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-27 15:08:23,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:23,056 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:23,056 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:23,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:23,260 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:23,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:23,260 INFO L82 PathProgramCache]: Analyzing trace with hash -577882837, now seen corresponding path program 94 times [2019-12-27 15:08:23,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:23,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662587850] [2019-12-27 15:08:23,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:23,335 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 15:08:23,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662587850] [2019-12-27 15:08:23,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448021028] [2019-12-27 15:08:23,336 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 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 15:08:23,380 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:23,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:23,381 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:23,382 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:23,515 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 15:08:23,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:23,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:23,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1907409853] [2019-12-27 15:08:23,516 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:23,516 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:23,518 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:23,518 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:23,519 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:23,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:23,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:23,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:23,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:23,520 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 9 states. [2019-12-27 15:08:23,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:23,759 INFO L93 Difference]: Finished difference Result 180 states and 408 transitions. [2019-12-27 15:08:23,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:23,759 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:23,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:23,760 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:08:23,760 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 15:08:23,761 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 15:08:23,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 139. [2019-12-27 15:08:23,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 15:08:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 331 transitions. [2019-12-27 15:08:23,765 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 331 transitions. Word has length 13 [2019-12-27 15:08:23,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:23,765 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 331 transitions. [2019-12-27 15:08:23,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:23,765 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 331 transitions. [2019-12-27 15:08:23,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:23,766 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:23,766 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:23,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:23,969 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:23,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:23,970 INFO L82 PathProgramCache]: Analyzing trace with hash -578026832, now seen corresponding path program 95 times [2019-12-27 15:08:23,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:23,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800681759] [2019-12-27 15:08:23,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:24,044 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 15:08:24,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800681759] [2019-12-27 15:08:24,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717052987] [2019-12-27 15:08:24,045 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 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 15:08:24,089 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:08:24,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:24,090 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:24,091 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:24,201 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 15:08:24,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:24,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:24,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1687008471] [2019-12-27 15:08:24,202 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:24,203 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:24,204 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:24,205 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:24,206 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:24,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:24,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:24,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:24,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:24,207 INFO L87 Difference]: Start difference. First operand 139 states and 331 transitions. Second operand 9 states. [2019-12-27 15:08:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:24,889 INFO L93 Difference]: Finished difference Result 185 states and 415 transitions. [2019-12-27 15:08:24,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:24,890 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:24,891 INFO L225 Difference]: With dead ends: 185 [2019-12-27 15:08:24,891 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:08:24,891 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=286, Unknown=1, NotChecked=0, Total=420 [2019-12-27 15:08:24,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:08:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 141. [2019-12-27 15:08:24,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:24,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-27 15:08:24,895 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-27 15:08:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:24,895 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-27 15:08:24,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-27 15:08:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:24,896 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:24,896 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:25,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:25,099 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:25,100 INFO L82 PathProgramCache]: Analyzing trace with hash -578026987, now seen corresponding path program 96 times [2019-12-27 15:08:25,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:25,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443312285] [2019-12-27 15:08:25,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:25,169 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 15:08:25,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443312285] [2019-12-27 15:08:25,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030859401] [2019-12-27 15:08:25,170 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 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 15:08:25,214 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:25,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:25,215 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:25,216 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:25,354 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 15:08:25,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:25,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:25,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1434215077] [2019-12-27 15:08:25,355 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:25,356 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:25,358 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:25,358 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:25,359 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:25,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:25,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:25,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:25,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:25,360 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 9 states. [2019-12-27 15:08:25,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:25,677 INFO L93 Difference]: Finished difference Result 184 states and 415 transitions. [2019-12-27 15:08:25,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:08:25,678 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:25,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:25,678 INFO L225 Difference]: With dead ends: 184 [2019-12-27 15:08:25,678 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 15:08:25,679 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:08:25,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 15:08:25,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2019-12-27 15:08:25,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:25,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-27 15:08:25,682 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-27 15:08:25,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:25,682 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-27 15:08:25,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-27 15:08:25,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:25,683 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:25,683 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:25,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:25,884 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:25,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:25,885 INFO L82 PathProgramCache]: Analyzing trace with hash -578031637, now seen corresponding path program 97 times [2019-12-27 15:08:25,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:25,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169957210] [2019-12-27 15:08:25,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:25,952 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 15:08:25,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169957210] [2019-12-27 15:08:25,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52804172] [2019-12-27 15:08:25,952 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 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 15:08:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:25,993 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:25,993 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:26,108 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 15:08:26,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:26,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:26,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [92827455] [2019-12-27 15:08:26,110 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:26,111 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:26,113 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:26,114 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:26,115 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:26,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:26,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:26,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:26,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:26,116 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 9 states. [2019-12-27 15:08:26,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:26,324 INFO L93 Difference]: Finished difference Result 180 states and 406 transitions. [2019-12-27 15:08:26,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:26,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:26,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:26,326 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:08:26,326 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 15:08:26,326 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:26,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 15:08:26,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2019-12-27 15:08:26,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-27 15:08:26,329 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-27 15:08:26,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:26,330 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-27 15:08:26,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-27 15:08:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:26,331 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:26,331 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:26,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:26,533 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:26,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:26,534 INFO L82 PathProgramCache]: Analyzing trace with hash -578031792, now seen corresponding path program 98 times [2019-12-27 15:08:26,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:26,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632806624] [2019-12-27 15:08:26,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:26,615 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 15:08:26,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632806624] [2019-12-27 15:08:26,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567689917] [2019-12-27 15:08:26,616 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 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 15:08:26,660 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:26,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:26,661 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:26,661 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:26,766 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 15:08:26,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:26,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:26,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [426250746] [2019-12-27 15:08:26,767 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:26,768 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:26,770 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:26,770 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:26,771 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:26,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:26,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:26,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:26,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:26,772 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 9 states. [2019-12-27 15:08:26,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:26,925 INFO L93 Difference]: Finished difference Result 170 states and 384 transitions. [2019-12-27 15:08:26,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:26,926 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:26,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:26,927 INFO L225 Difference]: With dead ends: 170 [2019-12-27 15:08:26,927 INFO L226 Difference]: Without dead ends: 169 [2019-12-27 15:08:26,927 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:26,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-12-27 15:08:26,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 138. [2019-12-27 15:08:26,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:08:26,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-27 15:08:26,931 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-27 15:08:26,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:26,931 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-27 15:08:26,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:26,931 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-27 15:08:26,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:26,931 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:26,932 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:27,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:27,132 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:27,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:27,133 INFO L82 PathProgramCache]: Analyzing trace with hash -716406027, now seen corresponding path program 99 times [2019-12-27 15:08:27,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:27,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597563266] [2019-12-27 15:08:27,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:27,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597563266] [2019-12-27 15:08:27,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43379969] [2019-12-27 15:08:27,198 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 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 15:08:27,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:27,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:27,240 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:27,241 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:27,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:27,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:27,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1401298277] [2019-12-27 15:08:27,314 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:27,315 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:27,317 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:27,317 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:27,318 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:27,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:27,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:27,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:27,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:27,319 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 9 states. [2019-12-27 15:08:27,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:27,467 INFO L93 Difference]: Finished difference Result 179 states and 404 transitions. [2019-12-27 15:08:27,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:27,468 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:27,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:27,469 INFO L225 Difference]: With dead ends: 179 [2019-12-27 15:08:27,469 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 15:08:27,469 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:27,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 15:08:27,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 142. [2019-12-27 15:08:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 15:08:27,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-27 15:08:27,473 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-27 15:08:27,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:27,473 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-27 15:08:27,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:27,473 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-27 15:08:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:27,474 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:27,474 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:27,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:27,677 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:27,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:27,678 INFO L82 PathProgramCache]: Analyzing trace with hash -716406182, now seen corresponding path program 100 times [2019-12-27 15:08:27,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:27,678 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870265886] [2019-12-27 15:08:27,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:27,767 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 15:08:27,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870265886] [2019-12-27 15:08:27,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476513295] [2019-12-27 15:08:27,767 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 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 15:08:27,809 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:27,809 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:27,810 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:27,810 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:27,908 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 15:08:27,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:27,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:27,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1713120474] [2019-12-27 15:08:27,909 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:27,909 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:27,911 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:27,911 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:27,912 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:27,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:27,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:27,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:27,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:27,913 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 9 states. [2019-12-27 15:08:28,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:28,082 INFO L93 Difference]: Finished difference Result 187 states and 429 transitions. [2019-12-27 15:08:28,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:28,082 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:28,083 INFO L225 Difference]: With dead ends: 187 [2019-12-27 15:08:28,083 INFO L226 Difference]: Without dead ends: 186 [2019-12-27 15:08:28,083 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:28,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-27 15:08:28,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 141. [2019-12-27 15:08:28,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:28,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-27 15:08:28,087 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-27 15:08:28,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:28,087 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-27 15:08:28,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:28,087 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-27 15:08:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:28,088 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:28,088 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:28,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:28,291 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:28,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:28,292 INFO L82 PathProgramCache]: Analyzing trace with hash -716410832, now seen corresponding path program 101 times [2019-12-27 15:08:28,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:28,292 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147597601] [2019-12-27 15:08:28,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:28,361 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 15:08:28,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147597601] [2019-12-27 15:08:28,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841910438] [2019-12-27 15:08:28,361 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:08:28,404 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:08:28,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:28,406 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:28,406 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:28,513 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 15:08:28,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:28,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:28,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1912918201] [2019-12-27 15:08:28,514 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:28,515 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:28,517 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:28,517 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:28,518 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:28,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:28,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:28,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:28,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:28,518 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 9 states. [2019-12-27 15:08:28,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:28,823 INFO L93 Difference]: Finished difference Result 184 states and 418 transitions. [2019-12-27 15:08:28,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:28,824 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:28,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:28,825 INFO L225 Difference]: With dead ends: 184 [2019-12-27 15:08:28,825 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 15:08:28,825 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:28,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 15:08:28,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2019-12-27 15:08:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 15:08:28,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-27 15:08:28,828 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-27 15:08:28,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:28,828 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-27 15:08:28,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:28,828 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-27 15:08:28,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:28,828 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:28,829 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:29,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:29,029 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:29,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:29,030 INFO L82 PathProgramCache]: Analyzing trace with hash -716410987, now seen corresponding path program 102 times [2019-12-27 15:08:29,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:29,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405450916] [2019-12-27 15:08:29,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:29,118 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 15:08:29,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405450916] [2019-12-27 15:08:29,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863183471] [2019-12-27 15:08:29,119 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 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 15:08:29,163 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:08:29,163 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:29,164 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:29,164 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:29,255 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 15:08:29,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:29,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:29,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1217331606] [2019-12-27 15:08:29,256 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:29,257 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:29,259 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:29,259 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:29,260 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:29,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:29,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:29,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:29,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:29,261 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 9 states. [2019-12-27 15:08:29,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:29,429 INFO L93 Difference]: Finished difference Result 189 states and 435 transitions. [2019-12-27 15:08:29,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:29,430 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:29,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:29,430 INFO L225 Difference]: With dead ends: 189 [2019-12-27 15:08:29,430 INFO L226 Difference]: Without dead ends: 188 [2019-12-27 15:08:29,431 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:29,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-27 15:08:29,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 140. [2019-12-27 15:08:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-27 15:08:29,434 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-27 15:08:29,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:29,435 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-27 15:08:29,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:29,435 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-27 15:08:29,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:29,436 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:29,436 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:29,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:29,639 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:29,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:29,639 INFO L82 PathProgramCache]: Analyzing trace with hash -716554982, now seen corresponding path program 103 times [2019-12-27 15:08:29,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:29,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411506559] [2019-12-27 15:08:29,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:29,716 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 15:08:29,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411506559] [2019-12-27 15:08:29,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400764782] [2019-12-27 15:08:29,717 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 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 15:08:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:29,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:29,759 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:29,842 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 15:08:29,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:29,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:29,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [802345678] [2019-12-27 15:08:29,843 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:29,843 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:29,845 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:29,846 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:29,846 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:29,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:29,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:29,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:29,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:29,847 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 9 states. [2019-12-27 15:08:30,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:30,008 INFO L93 Difference]: Finished difference Result 184 states and 417 transitions. [2019-12-27 15:08:30,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:30,009 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:30,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:30,009 INFO L225 Difference]: With dead ends: 184 [2019-12-27 15:08:30,010 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 15:08:30,010 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:30,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 15:08:30,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2019-12-27 15:08:30,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 15:08:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-27 15:08:30,013 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-27 15:08:30,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:30,013 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-27 15:08:30,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:30,014 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-27 15:08:30,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:30,014 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:30,014 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:30,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:30,215 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:30,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:30,215 INFO L82 PathProgramCache]: Analyzing trace with hash -716555137, now seen corresponding path program 104 times [2019-12-27 15:08:30,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:30,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983533394] [2019-12-27 15:08:30,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:30,298 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 15:08:30,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983533394] [2019-12-27 15:08:30,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413016006] [2019-12-27 15:08:30,298 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 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 15:08:30,340 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:30,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:30,341 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:30,342 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:30,455 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 15:08:30,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:30,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:30,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1695718119] [2019-12-27 15:08:30,456 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:30,456 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:30,459 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:30,459 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:30,460 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:30,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:30,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:30,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:30,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:30,461 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 9 states. [2019-12-27 15:08:30,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:30,637 INFO L93 Difference]: Finished difference Result 186 states and 426 transitions. [2019-12-27 15:08:30,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:30,638 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:30,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:30,638 INFO L225 Difference]: With dead ends: 186 [2019-12-27 15:08:30,638 INFO L226 Difference]: Without dead ends: 185 [2019-12-27 15:08:30,638 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-27 15:08:30,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 141. [2019-12-27 15:08:30,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:30,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-27 15:08:30,642 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-27 15:08:30,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:30,642 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-27 15:08:30,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:30,642 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-27 15:08:30,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:30,643 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:30,643 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:30,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:30,843 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:30,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:30,844 INFO L82 PathProgramCache]: Analyzing trace with hash -716559787, now seen corresponding path program 105 times [2019-12-27 15:08:30,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:30,845 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401595813] [2019-12-27 15:08:30,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:30,918 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 15:08:30,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401595813] [2019-12-27 15:08:30,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41449422] [2019-12-27 15:08:30,919 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 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 15:08:30,962 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:30,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:30,963 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:30,964 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:31,056 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 15:08:31,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:31,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:31,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [814113627] [2019-12-27 15:08:31,057 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:31,058 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:31,060 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:31,060 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:31,061 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:31,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:31,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:31,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:31,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:31,061 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 9 states. [2019-12-27 15:08:31,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:31,243 INFO L93 Difference]: Finished difference Result 183 states and 417 transitions. [2019-12-27 15:08:31,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:31,244 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:31,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:31,245 INFO L225 Difference]: With dead ends: 183 [2019-12-27 15:08:31,245 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 15:08:31,245 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:31,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 15:08:31,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 142. [2019-12-27 15:08:31,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 15:08:31,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-27 15:08:31,248 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-27 15:08:31,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:31,248 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-27 15:08:31,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:31,249 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-27 15:08:31,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:31,249 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:31,249 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:31,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:31,450 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:31,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:31,450 INFO L82 PathProgramCache]: Analyzing trace with hash -716559942, now seen corresponding path program 106 times [2019-12-27 15:08:31,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:31,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014846366] [2019-12-27 15:08:31,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:31,518 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 15:08:31,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014846366] [2019-12-27 15:08:31,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564030510] [2019-12-27 15:08:31,518 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 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 15:08:31,560 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:31,560 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:31,561 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:31,561 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:31,651 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 15:08:31,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:31,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:31,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [625514695] [2019-12-27 15:08:31,651 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:31,652 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:31,655 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:31,655 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:31,656 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:31,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:31,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:31,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:31,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:31,657 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 9 states. [2019-12-27 15:08:31,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:31,814 INFO L93 Difference]: Finished difference Result 180 states and 414 transitions. [2019-12-27 15:08:31,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:31,815 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:31,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:31,816 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:08:31,816 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 15:08:31,816 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:31,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 15:08:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 139. [2019-12-27 15:08:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 15:08:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 331 transitions. [2019-12-27 15:08:31,820 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 331 transitions. Word has length 13 [2019-12-27 15:08:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:31,820 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 331 transitions. [2019-12-27 15:08:31,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:31,821 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 331 transitions. [2019-12-27 15:08:31,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:31,821 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:31,821 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:32,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:32,023 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:32,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:32,024 INFO L82 PathProgramCache]: Analyzing trace with hash -721023632, now seen corresponding path program 107 times [2019-12-27 15:08:32,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:32,024 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988894336] [2019-12-27 15:08:32,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:32,096 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 15:08:32,097 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988894336] [2019-12-27 15:08:32,097 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117371483] [2019-12-27 15:08:32,097 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:32,140 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:32,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:32,141 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:32,142 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:32,224 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 15:08:32,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:32,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:32,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1323072963] [2019-12-27 15:08:32,225 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:32,226 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:32,228 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:32,228 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:32,229 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:32,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:32,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:32,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:32,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:32,229 INFO L87 Difference]: Start difference. First operand 139 states and 331 transitions. Second operand 9 states. [2019-12-27 15:08:32,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:32,388 INFO L93 Difference]: Finished difference Result 187 states and 423 transitions. [2019-12-27 15:08:32,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:32,388 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:32,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:32,389 INFO L225 Difference]: With dead ends: 187 [2019-12-27 15:08:32,389 INFO L226 Difference]: Without dead ends: 186 [2019-12-27 15:08:32,389 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:32,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-27 15:08:32,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 142. [2019-12-27 15:08:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 15:08:32,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-27 15:08:32,392 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-27 15:08:32,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:32,392 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-27 15:08:32,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:32,392 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-27 15:08:32,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:32,393 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:32,393 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:32,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:32,593 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:32,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:32,594 INFO L82 PathProgramCache]: Analyzing trace with hash -721023787, now seen corresponding path program 108 times [2019-12-27 15:08:32,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:32,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259146627] [2019-12-27 15:08:32,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:32,673 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 15:08:32,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259146627] [2019-12-27 15:08:32,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089574199] [2019-12-27 15:08:32,674 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:32,722 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:32,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:32,723 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:32,724 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:32,836 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 15:08:32,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:32,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:32,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1845039764] [2019-12-27 15:08:32,837 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:32,838 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:32,839 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:32,839 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:32,840 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:32,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:32,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:32,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:32,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:32,841 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 9 states. [2019-12-27 15:08:33,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:33,021 INFO L93 Difference]: Finished difference Result 190 states and 436 transitions. [2019-12-27 15:08:33,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:33,022 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:33,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:33,022 INFO L225 Difference]: With dead ends: 190 [2019-12-27 15:08:33,023 INFO L226 Difference]: Without dead ends: 189 [2019-12-27 15:08:33,023 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:33,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-27 15:08:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 141. [2019-12-27 15:08:33,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:33,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-27 15:08:33,026 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-27 15:08:33,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:33,026 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-27 15:08:33,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:33,026 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-27 15:08:33,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:33,027 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:33,027 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:33,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:33,228 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:33,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:33,228 INFO L82 PathProgramCache]: Analyzing trace with hash -721028437, now seen corresponding path program 109 times [2019-12-27 15:08:33,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:33,229 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635261129] [2019-12-27 15:08:33,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:33,297 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 15:08:33,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635261129] [2019-12-27 15:08:33,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352427336] [2019-12-27 15:08:33,297 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:33,340 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:33,341 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:33,460 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 15:08:33,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:33,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:33,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [732465561] [2019-12-27 15:08:33,461 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:33,462 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:33,463 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:33,463 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:33,464 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:33,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:33,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:33,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:33,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:33,465 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 9 states. [2019-12-27 15:08:33,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:33,662 INFO L93 Difference]: Finished difference Result 185 states and 422 transitions. [2019-12-27 15:08:33,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:33,663 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:33,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:33,664 INFO L225 Difference]: With dead ends: 185 [2019-12-27 15:08:33,664 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:08:33,664 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:33,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:08:33,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 142. [2019-12-27 15:08:33,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 15:08:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-27 15:08:33,669 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-27 15:08:33,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:33,669 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-27 15:08:33,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:33,669 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-27 15:08:33,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:33,669 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:33,670 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:33,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:33,873 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:33,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:33,873 INFO L82 PathProgramCache]: Analyzing trace with hash -721028592, now seen corresponding path program 110 times [2019-12-27 15:08:33,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:33,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642302889] [2019-12-27 15:08:33,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:33,943 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 15:08:33,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642302889] [2019-12-27 15:08:33,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45913177] [2019-12-27 15:08:33,944 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:33,988 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:33,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:33,989 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:33,989 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:34,130 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 15:08:34,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:34,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:34,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1241408956] [2019-12-27 15:08:34,131 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:34,132 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:34,134 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:34,134 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:34,134 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:34,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:34,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:34,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:34,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:34,135 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 9 states. [2019-12-27 15:08:34,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:34,335 INFO L93 Difference]: Finished difference Result 184 states and 421 transitions. [2019-12-27 15:08:34,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:34,336 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:34,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:34,337 INFO L225 Difference]: With dead ends: 184 [2019-12-27 15:08:34,337 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 15:08:34,337 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:34,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 15:08:34,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2019-12-27 15:08:34,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:34,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-27 15:08:34,340 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-27 15:08:34,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:34,341 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-27 15:08:34,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:34,341 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-27 15:08:34,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:34,341 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:34,341 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:34,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:34,544 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:34,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:34,545 INFO L82 PathProgramCache]: Analyzing trace with hash -721172587, now seen corresponding path program 111 times [2019-12-27 15:08:34,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:34,545 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561835362] [2019-12-27 15:08:34,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:34,622 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 15:08:34,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561835362] [2019-12-27 15:08:34,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128008440] [2019-12-27 15:08:34,622 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:34,666 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:34,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:34,667 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:34,667 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:34,759 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 15:08:34,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:34,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:34,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1195840037] [2019-12-27 15:08:34,760 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:34,761 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:34,763 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:34,763 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:34,764 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:34,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:34,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:34,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:34,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:34,765 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 9 states. [2019-12-27 15:08:34,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:34,932 INFO L93 Difference]: Finished difference Result 185 states and 420 transitions. [2019-12-27 15:08:34,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:34,933 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:34,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:34,933 INFO L225 Difference]: With dead ends: 185 [2019-12-27 15:08:34,934 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:08:34,934 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:34,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:08:34,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 142. [2019-12-27 15:08:34,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 15:08:34,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-27 15:08:34,942 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-27 15:08:34,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:34,943 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-27 15:08:34,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:34,943 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-27 15:08:34,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:34,943 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:34,943 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:35,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:35,144 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:35,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:35,145 INFO L82 PathProgramCache]: Analyzing trace with hash -721172742, now seen corresponding path program 112 times [2019-12-27 15:08:35,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:35,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382640994] [2019-12-27 15:08:35,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:35,211 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 15:08:35,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382640994] [2019-12-27 15:08:35,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469627495] [2019-12-27 15:08:35,212 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:35,255 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:35,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:35,255 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:35,256 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:35,825 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 15:08:35,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:35,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:35,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1494829681] [2019-12-27 15:08:35,826 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:35,827 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:35,828 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:35,828 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:35,829 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:35,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:35,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:35,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:35,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=169, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:08:35,830 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 9 states. [2019-12-27 15:08:36,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:36,175 INFO L93 Difference]: Finished difference Result 182 states and 416 transitions. [2019-12-27 15:08:36,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:36,176 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:36,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:36,177 INFO L225 Difference]: With dead ends: 182 [2019-12-27 15:08:36,177 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:08:36,177 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=284, Unknown=1, NotChecked=0, Total=420 [2019-12-27 15:08:36,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:08:36,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 141. [2019-12-27 15:08:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:36,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-27 15:08:36,181 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-27 15:08:36,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:36,181 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-27 15:08:36,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:36,181 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-27 15:08:36,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:36,182 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:36,182 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:36,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:36,382 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:36,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:36,383 INFO L82 PathProgramCache]: Analyzing trace with hash -721177392, now seen corresponding path program 113 times [2019-12-27 15:08:36,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:36,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890492639] [2019-12-27 15:08:36,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:36,476 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 15:08:36,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890492639] [2019-12-27 15:08:36,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098967318] [2019-12-27 15:08:36,477 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:36,527 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:08:36,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:36,528 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:36,529 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:36,631 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 15:08:36,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:36,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:36,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1416853878] [2019-12-27 15:08:36,632 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:36,633 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:36,635 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:36,635 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:36,636 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:36,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:36,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:36,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:36,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:36,637 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 9 states. [2019-12-27 15:08:36,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:36,815 INFO L93 Difference]: Finished difference Result 173 states and 394 transitions. [2019-12-27 15:08:36,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:36,816 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:36,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:36,816 INFO L225 Difference]: With dead ends: 173 [2019-12-27 15:08:36,817 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 15:08:36,817 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:36,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 15:08:36,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2019-12-27 15:08:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 15:08:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-27 15:08:36,820 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-27 15:08:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:36,821 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-27 15:08:36,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:36,821 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-27 15:08:36,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:36,821 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:36,821 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:37,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:37,022 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:37,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:37,023 INFO L82 PathProgramCache]: Analyzing trace with hash -721177547, now seen corresponding path program 114 times [2019-12-27 15:08:37,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:37,023 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613729048] [2019-12-27 15:08:37,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:37,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613729048] [2019-12-27 15:08:37,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5920725] [2019-12-27 15:08:37,093 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:37,137 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:37,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:37,138 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:37,138 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:37,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:37,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:37,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [982581847] [2019-12-27 15:08:37,237 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:37,238 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:37,240 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:37,240 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:37,241 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:37,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:37,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:37,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:37,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:37,241 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 9 states. [2019-12-27 15:08:37,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:37,380 INFO L93 Difference]: Finished difference Result 158 states and 361 transitions. [2019-12-27 15:08:37,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:37,380 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:37,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:37,381 INFO L225 Difference]: With dead ends: 158 [2019-12-27 15:08:37,381 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 15:08:37,381 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 15:08:37,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2019-12-27 15:08:37,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:08:37,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 323 transitions. [2019-12-27 15:08:37,385 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 323 transitions. Word has length 13 [2019-12-27 15:08:37,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:37,385 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 323 transitions. [2019-12-27 15:08:37,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:37,385 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 323 transitions. [2019-12-27 15:08:37,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:37,386 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:37,386 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:37,589 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:37,589 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:37,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:37,590 INFO L82 PathProgramCache]: Analyzing trace with hash -831836784, now seen corresponding path program 7 times [2019-12-27 15:08:37,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:37,591 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009877971] [2019-12-27 15:08:37,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:37,672 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 15:08:37,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009877971] [2019-12-27 15:08:37,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154776685] [2019-12-27 15:08:37,672 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:37,713 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:08:37,713 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:37,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 15:08:37,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2019-12-27 15:08:37,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [780297524] [2019-12-27 15:08:37,806 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:37,807 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:37,809 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 45 transitions. [2019-12-27 15:08:37,810 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:37,812 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 14 times. [2019-12-27 15:08:37,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:08:37,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:37,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:08:37,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:37,813 INFO L87 Difference]: Start difference. First operand 138 states and 323 transitions. Second operand 8 states. [2019-12-27 15:08:37,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:37,833 INFO L93 Difference]: Finished difference Result 151 states and 325 transitions. [2019-12-27 15:08:37,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:08:37,834 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-27 15:08:37,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:37,834 INFO L225 Difference]: With dead ends: 151 [2019-12-27 15:08:37,834 INFO L226 Difference]: Without dead ends: 137 [2019-12-27 15:08:37,835 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:37,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-12-27 15:08:37,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2019-12-27 15:08:37,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 15:08:37,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2019-12-27 15:08:37,837 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 13 [2019-12-27 15:08:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:37,838 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2019-12-27 15:08:37,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:08:37,838 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2019-12-27 15:08:37,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:37,838 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:37,839 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:38,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:38,042 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:38,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:38,043 INFO L82 PathProgramCache]: Analyzing trace with hash 801705142, now seen corresponding path program 115 times [2019-12-27 15:08:38,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:38,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664873648] [2019-12-27 15:08:38,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:38,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664873648] [2019-12-27 15:08:38,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399603889] [2019-12-27 15:08:38,182 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:38,251 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:38,253 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:38,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:38,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:38,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1053420662] [2019-12-27 15:08:38,447 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:38,450 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:38,454 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 30 transitions. [2019-12-27 15:08:38,454 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:38,455 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:38,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:38,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:38,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:38,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:38,457 INFO L87 Difference]: Start difference. First operand 137 states and 299 transitions. Second operand 10 states. [2019-12-27 15:08:38,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:38,530 INFO L93 Difference]: Finished difference Result 161 states and 344 transitions. [2019-12-27 15:08:38,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:38,531 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:38,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:38,532 INFO L225 Difference]: With dead ends: 161 [2019-12-27 15:08:38,532 INFO L226 Difference]: Without dead ends: 159 [2019-12-27 15:08:38,533 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:08:38,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-27 15:08:38,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 137. [2019-12-27 15:08:38,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 15:08:38,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 301 transitions. [2019-12-27 15:08:38,540 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 301 transitions. Word has length 14 [2019-12-27 15:08:38,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:38,541 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 301 transitions. [2019-12-27 15:08:38,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:38,541 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 301 transitions. [2019-12-27 15:08:38,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:38,542 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:38,542 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:38,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:38,746 INFO L410 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:38,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:38,746 INFO L82 PathProgramCache]: Analyzing trace with hash 802747827, now seen corresponding path program 116 times [2019-12-27 15:08:38,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:38,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197598301] [2019-12-27 15:08:38,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:38,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197598301] [2019-12-27 15:08:38,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777236465] [2019-12-27 15:08:38,886 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:38,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:38,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:38,950 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:38,950 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:39,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:39,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:39,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [728975938] [2019-12-27 15:08:39,085 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:39,086 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:39,091 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 28 transitions. [2019-12-27 15:08:39,092 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:39,092 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:39,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:39,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:39,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:39,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:39,093 INFO L87 Difference]: Start difference. First operand 137 states and 301 transitions. Second operand 10 states. [2019-12-27 15:08:39,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:39,177 INFO L93 Difference]: Finished difference Result 169 states and 363 transitions. [2019-12-27 15:08:39,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:39,177 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:39,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:39,178 INFO L225 Difference]: With dead ends: 169 [2019-12-27 15:08:39,178 INFO L226 Difference]: Without dead ends: 168 [2019-12-27 15:08:39,178 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:39,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-12-27 15:08:39,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 140. [2019-12-27 15:08:39,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 312 transitions. [2019-12-27 15:08:39,181 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 312 transitions. Word has length 14 [2019-12-27 15:08:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:39,181 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 312 transitions. [2019-12-27 15:08:39,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 312 transitions. [2019-12-27 15:08:39,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:39,182 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:39,182 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:39,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:39,385 INFO L410 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:39,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:39,385 INFO L82 PathProgramCache]: Analyzing trace with hash 802747672, now seen corresponding path program 117 times [2019-12-27 15:08:39,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:39,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357042303] [2019-12-27 15:08:39,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:39,462 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357042303] [2019-12-27 15:08:39,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664659731] [2019-12-27 15:08:39,463 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:39,504 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:39,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:39,505 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:39,505 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:39,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:39,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:39,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [760947972] [2019-12-27 15:08:39,703 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:39,705 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:39,709 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 28 transitions. [2019-12-27 15:08:39,709 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:39,710 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:39,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:39,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:39,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:39,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:39,711 INFO L87 Difference]: Start difference. First operand 140 states and 312 transitions. Second operand 10 states. [2019-12-27 15:08:39,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:39,847 INFO L93 Difference]: Finished difference Result 180 states and 385 transitions. [2019-12-27 15:08:39,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:39,848 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:39,849 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:08:39,849 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 15:08:39,850 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:39,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 15:08:39,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 140. [2019-12-27 15:08:39,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:39,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-27 15:08:39,854 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-27 15:08:39,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:39,854 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-27 15:08:39,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:39,855 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-27 15:08:39,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:39,855 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:39,856 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:40,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:40,060 INFO L410 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:40,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:40,060 INFO L82 PathProgramCache]: Analyzing trace with hash 802743022, now seen corresponding path program 118 times [2019-12-27 15:08:40,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:40,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364123902] [2019-12-27 15:08:40,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:40,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364123902] [2019-12-27 15:08:40,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634867374] [2019-12-27 15:08:40,187 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:40,259 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:40,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:40,261 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:40,262 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:41,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:41,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:41,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1254090800] [2019-12-27 15:08:41,578 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:41,579 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:41,581 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 28 transitions. [2019-12-27 15:08:41,581 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:41,582 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:41,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:41,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:41,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:41,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=202, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:08:41,582 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 10 states. [2019-12-27 15:08:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:42,764 INFO L93 Difference]: Finished difference Result 171 states and 367 transitions. [2019-12-27 15:08:42,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:42,765 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:42,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:42,766 INFO L225 Difference]: With dead ends: 171 [2019-12-27 15:08:42,766 INFO L226 Difference]: Without dead ends: 169 [2019-12-27 15:08:42,766 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=136, Invalid=241, Unknown=3, NotChecked=0, Total=380 [2019-12-27 15:08:42,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-12-27 15:08:42,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 140. [2019-12-27 15:08:42,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-27 15:08:42,770 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-27 15:08:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:42,770 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-27 15:08:42,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-27 15:08:42,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:42,770 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:42,770 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:42,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:42,971 INFO L410 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:42,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:42,972 INFO L82 PathProgramCache]: Analyzing trace with hash 835071062, now seen corresponding path program 119 times [2019-12-27 15:08:42,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:42,972 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705483906] [2019-12-27 15:08:42,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:43,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705483906] [2019-12-27 15:08:43,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047066001] [2019-12-27 15:08:43,053 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:43,101 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:43,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:43,103 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:43,104 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:43,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:43,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:43,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [625677670] [2019-12-27 15:08:43,212 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:43,213 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:43,215 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:43,215 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:43,215 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:43,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:43,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:43,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:43,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:43,216 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 10 states. [2019-12-27 15:08:43,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:43,338 INFO L93 Difference]: Finished difference Result 172 states and 373 transitions. [2019-12-27 15:08:43,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:43,338 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:43,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:43,339 INFO L225 Difference]: With dead ends: 172 [2019-12-27 15:08:43,339 INFO L226 Difference]: Without dead ends: 171 [2019-12-27 15:08:43,339 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:43,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-27 15:08:43,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 144. [2019-12-27 15:08:43,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 15:08:43,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 326 transitions. [2019-12-27 15:08:43,342 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 326 transitions. Word has length 14 [2019-12-27 15:08:43,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:43,342 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 326 transitions. [2019-12-27 15:08:43,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:43,343 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 326 transitions. [2019-12-27 15:08:43,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:43,343 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:43,343 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:43,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:43,544 INFO L410 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:43,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:43,544 INFO L82 PathProgramCache]: Analyzing trace with hash 835070907, now seen corresponding path program 120 times [2019-12-27 15:08:43,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:43,545 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047243712] [2019-12-27 15:08:43,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:43,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047243712] [2019-12-27 15:08:43,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809855156] [2019-12-27 15:08:43,635 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:43,679 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:43,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:43,680 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:43,681 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:43,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:43,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:43,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [250805714] [2019-12-27 15:08:43,837 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:43,838 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:43,840 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:43,840 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:43,840 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:43,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:43,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:43,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:43,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:43,841 INFO L87 Difference]: Start difference. First operand 144 states and 326 transitions. Second operand 10 states. [2019-12-27 15:08:43,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:43,965 INFO L93 Difference]: Finished difference Result 194 states and 420 transitions. [2019-12-27 15:08:43,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:43,965 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:43,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:43,966 INFO L225 Difference]: With dead ends: 194 [2019-12-27 15:08:43,966 INFO L226 Difference]: Without dead ends: 193 [2019-12-27 15:08:43,966 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:43,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-27 15:08:43,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 144. [2019-12-27 15:08:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 15:08:43,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 326 transitions. [2019-12-27 15:08:43,969 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 326 transitions. Word has length 14 [2019-12-27 15:08:43,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:43,969 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 326 transitions. [2019-12-27 15:08:43,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:43,970 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 326 transitions. [2019-12-27 15:08:43,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:43,970 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:43,970 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:44,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:44,171 INFO L410 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:44,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:44,171 INFO L82 PathProgramCache]: Analyzing trace with hash 835066257, now seen corresponding path program 121 times [2019-12-27 15:08:44,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:44,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961564829] [2019-12-27 15:08:44,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:44,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:44,243 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961564829] [2019-12-27 15:08:44,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943469447] [2019-12-27 15:08:44,244 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:44,284 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:44,285 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:45,503 WARN L192 SmtUtils]: Spent 572.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-27 15:08:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:45,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:45,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:45,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1357548852] [2019-12-27 15:08:45,504 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:45,505 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:45,507 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:45,507 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:45,507 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:45,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:45,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:45,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:45,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:45,507 INFO L87 Difference]: Start difference. First operand 144 states and 326 transitions. Second operand 10 states. [2019-12-27 15:08:46,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:46,203 INFO L93 Difference]: Finished difference Result 197 states and 427 transitions. [2019-12-27 15:08:46,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:46,204 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:46,204 INFO L225 Difference]: With dead ends: 197 [2019-12-27 15:08:46,205 INFO L226 Difference]: Without dead ends: 196 [2019-12-27 15:08:46,205 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=148, Invalid=271, Unknown=1, NotChecked=0, Total=420 [2019-12-27 15:08:46,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-27 15:08:46,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 145. [2019-12-27 15:08:46,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 15:08:46,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 330 transitions. [2019-12-27 15:08:46,208 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 330 transitions. Word has length 14 [2019-12-27 15:08:46,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:46,208 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 330 transitions. [2019-12-27 15:08:46,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:46,209 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 330 transitions. [2019-12-27 15:08:46,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:46,209 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:46,209 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:46,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:46,412 INFO L410 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:46,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:46,413 INFO L82 PathProgramCache]: Analyzing trace with hash 835066102, now seen corresponding path program 122 times [2019-12-27 15:08:46,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:46,413 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834936993] [2019-12-27 15:08:46,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:46,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:46,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834936993] [2019-12-27 15:08:46,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364926929] [2019-12-27 15:08:46,495 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:46,537 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:46,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:46,538 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:46,539 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:47,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:47,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:47,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1552471761] [2019-12-27 15:08:47,947 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:47,948 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:47,950 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:47,950 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:47,950 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:47,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:47,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:47,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:47,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:47,951 INFO L87 Difference]: Start difference. First operand 145 states and 330 transitions. Second operand 10 states. [2019-12-27 15:08:49,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:49,616 INFO L93 Difference]: Finished difference Result 192 states and 416 transitions. [2019-12-27 15:08:49,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:49,617 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:49,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:49,618 INFO L225 Difference]: With dead ends: 192 [2019-12-27 15:08:49,618 INFO L226 Difference]: Without dead ends: 188 [2019-12-27 15:08:49,618 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=152, Invalid=265, Unknown=3, NotChecked=0, Total=420 [2019-12-27 15:08:49,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-27 15:08:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 144. [2019-12-27 15:08:49,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 15:08:49,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 325 transitions. [2019-12-27 15:08:49,621 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 325 transitions. Word has length 14 [2019-12-27 15:08:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:49,621 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 325 transitions. [2019-12-27 15:08:49,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:49,622 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 325 transitions. [2019-12-27 15:08:49,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:49,622 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:49,622 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:49,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:49,823 INFO L410 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:49,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:49,824 INFO L82 PathProgramCache]: Analyzing trace with hash 834922107, now seen corresponding path program 123 times [2019-12-27 15:08:49,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:49,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897143398] [2019-12-27 15:08:49,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:49,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897143398] [2019-12-27 15:08:49,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169601127] [2019-12-27 15:08:49,899 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:49,943 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:49,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:49,944 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:49,945 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:50,676 WARN L192 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:08:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:50,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:50,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:50,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [49399049] [2019-12-27 15:08:50,694 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:50,695 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:50,697 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:50,697 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:50,697 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:50,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:50,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:50,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:50,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:50,698 INFO L87 Difference]: Start difference. First operand 144 states and 325 transitions. Second operand 10 states. [2019-12-27 15:08:50,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:50,837 INFO L93 Difference]: Finished difference Result 186 states and 403 transitions. [2019-12-27 15:08:50,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:50,838 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:50,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:50,839 INFO L225 Difference]: With dead ends: 186 [2019-12-27 15:08:50,839 INFO L226 Difference]: Without dead ends: 185 [2019-12-27 15:08:50,839 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:50,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-27 15:08:50,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 146. [2019-12-27 15:08:50,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 15:08:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 332 transitions. [2019-12-27 15:08:50,843 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 332 transitions. Word has length 14 [2019-12-27 15:08:50,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:50,844 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 332 transitions. [2019-12-27 15:08:50,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:50,844 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 332 transitions. [2019-12-27 15:08:50,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:50,844 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:50,844 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:51,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:51,048 INFO L410 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:51,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:51,048 INFO L82 PathProgramCache]: Analyzing trace with hash 834921952, now seen corresponding path program 124 times [2019-12-27 15:08:51,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:51,048 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145994019] [2019-12-27 15:08:51,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:51,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145994019] [2019-12-27 15:08:51,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924734966] [2019-12-27 15:08:51,129 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:51,172 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:51,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:51,173 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:51,174 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:52,693 WARN L192 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-27 15:08:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:52,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:52,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:52,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1890796299] [2019-12-27 15:08:52,695 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:52,696 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:52,699 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:52,699 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:52,699 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:52,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:52,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:52,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:52,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=198, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:08:52,700 INFO L87 Difference]: Start difference. First operand 146 states and 332 transitions. Second operand 10 states. [2019-12-27 15:08:53,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:53,029 INFO L93 Difference]: Finished difference Result 187 states and 407 transitions. [2019-12-27 15:08:53,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:53,030 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:53,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:53,031 INFO L225 Difference]: With dead ends: 187 [2019-12-27 15:08:53,031 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:08:53,031 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=155, Invalid=264, Unknown=1, NotChecked=0, Total=420 [2019-12-27 15:08:53,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:08:53,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 145. [2019-12-27 15:08:53,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 15:08:53,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 328 transitions. [2019-12-27 15:08:53,035 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 328 transitions. Word has length 14 [2019-12-27 15:08:53,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:53,036 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 328 transitions. [2019-12-27 15:08:53,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:53,036 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 328 transitions. [2019-12-27 15:08:53,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:53,036 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:53,036 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:53,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:53,240 INFO L410 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:53,240 INFO L82 PathProgramCache]: Analyzing trace with hash 834917302, now seen corresponding path program 125 times [2019-12-27 15:08:53,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:53,240 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994410079] [2019-12-27 15:08:53,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:53,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994410079] [2019-12-27 15:08:53,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976884609] [2019-12-27 15:08:53,327 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:53,368 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:53,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:53,370 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:53,374 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:54,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:54,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:54,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1462204389] [2019-12-27 15:08:54,732 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:54,733 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:54,735 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:54,735 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:54,735 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:54,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:54,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:54,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:54,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=200, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:08:54,736 INFO L87 Difference]: Start difference. First operand 145 states and 328 transitions. Second operand 10 states. [2019-12-27 15:08:57,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:57,168 INFO L93 Difference]: Finished difference Result 179 states and 390 transitions. [2019-12-27 15:08:57,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:57,169 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:57,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:57,170 INFO L225 Difference]: With dead ends: 179 [2019-12-27 15:08:57,170 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 15:08:57,170 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=152, Invalid=265, Unknown=3, NotChecked=0, Total=420 [2019-12-27 15:08:57,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 15:08:57,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 144. [2019-12-27 15:08:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 15:08:57,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 325 transitions. [2019-12-27 15:08:57,173 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 325 transitions. Word has length 14 [2019-12-27 15:08:57,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:57,173 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 325 transitions. [2019-12-27 15:08:57,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:57,173 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 325 transitions. [2019-12-27 15:08:57,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:57,174 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:57,174 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:57,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:57,374 INFO L410 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:57,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:57,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091347, now seen corresponding path program 126 times [2019-12-27 15:08:57,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:57,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347254816] [2019-12-27 15:08:57,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:57,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347254816] [2019-12-27 15:08:57,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389398098] [2019-12-27 15:08:57,468 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:57,511 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:57,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:57,512 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:57,513 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:57,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:57,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:57,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [772889673] [2019-12-27 15:08:57,621 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:57,622 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:57,624 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:08:57,624 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:57,624 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:57,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:57,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:57,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:57,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:57,625 INFO L87 Difference]: Start difference. First operand 144 states and 325 transitions. Second operand 10 states. [2019-12-27 15:08:57,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:57,750 INFO L93 Difference]: Finished difference Result 170 states and 372 transitions. [2019-12-27 15:08:57,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:57,751 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:57,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:57,752 INFO L225 Difference]: With dead ends: 170 [2019-12-27 15:08:57,752 INFO L226 Difference]: Without dead ends: 162 [2019-12-27 15:08:57,752 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:57,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-27 15:08:57,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2019-12-27 15:08:57,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:08:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-27 15:08:57,755 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-27 15:08:57,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:57,756 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-27 15:08:57,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:57,756 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-27 15:08:57,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:57,756 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:57,756 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:57,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:57,957 INFO L410 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:57,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:57,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091192, now seen corresponding path program 127 times [2019-12-27 15:08:57,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:57,958 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176066724] [2019-12-27 15:08:57,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:58,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176066724] [2019-12-27 15:08:58,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418260575] [2019-12-27 15:08:58,038 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:58,087 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:58,088 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:58,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:58,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:58,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [522985212] [2019-12-27 15:08:58,218 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:58,218 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:58,220 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:08:58,220 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:58,220 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:58,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:58,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:58,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:58,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:58,221 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 10 states. [2019-12-27 15:08:58,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:58,375 INFO L93 Difference]: Finished difference Result 192 states and 419 transitions. [2019-12-27 15:08:58,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:58,375 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:58,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:58,376 INFO L225 Difference]: With dead ends: 192 [2019-12-27 15:08:58,376 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 15:08:58,376 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:58,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 15:08:58,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 149. [2019-12-27 15:08:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:08:58,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-27 15:08:58,380 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-27 15:08:58,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:58,380 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-27 15:08:58,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:58,380 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-27 15:08:58,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:58,380 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:58,380 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:58,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:58,581 INFO L410 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:58,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:58,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086542, now seen corresponding path program 128 times [2019-12-27 15:08:58,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:58,582 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396268845] [2019-12-27 15:08:58,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:58,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396268845] [2019-12-27 15:08:58,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014737320] [2019-12-27 15:08:58,664 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:58,706 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:58,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:58,706 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:58,707 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:58,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:58,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:58,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [23889014] [2019-12-27 15:08:58,841 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:58,842 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:58,844 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:08:58,844 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:58,844 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:58,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:58,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:58,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:58,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:58,845 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 10 states. [2019-12-27 15:08:59,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:59,062 INFO L93 Difference]: Finished difference Result 207 states and 451 transitions. [2019-12-27 15:08:59,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:59,063 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:59,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:59,064 INFO L225 Difference]: With dead ends: 207 [2019-12-27 15:08:59,064 INFO L226 Difference]: Without dead ends: 206 [2019-12-27 15:08:59,064 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:59,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-27 15:08:59,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 150. [2019-12-27 15:08:59,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:08:59,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 340 transitions. [2019-12-27 15:08:59,067 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 340 transitions. Word has length 14 [2019-12-27 15:08:59,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:59,068 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 340 transitions. [2019-12-27 15:08:59,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:59,068 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 340 transitions. [2019-12-27 15:08:59,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:59,068 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:59,068 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:59,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:59,269 INFO L410 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:59,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:59,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086387, now seen corresponding path program 129 times [2019-12-27 15:08:59,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:59,270 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240674395] [2019-12-27 15:08:59,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:59,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240674395] [2019-12-27 15:08:59,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275038897] [2019-12-27 15:08:59,360 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:59,403 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:08:59,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:59,404 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:59,405 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:59,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:59,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:59,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1835580174] [2019-12-27 15:08:59,557 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:59,558 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:59,560 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:08:59,560 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:59,560 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:59,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:59,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:59,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:59,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:59,561 INFO L87 Difference]: Start difference. First operand 150 states and 340 transitions. Second operand 10 states. [2019-12-27 15:08:59,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:59,732 INFO L93 Difference]: Finished difference Result 204 states and 445 transitions. [2019-12-27 15:08:59,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:59,732 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:59,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:59,733 INFO L225 Difference]: With dead ends: 204 [2019-12-27 15:08:59,733 INFO L226 Difference]: Without dead ends: 203 [2019-12-27 15:08:59,734 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:59,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-27 15:08:59,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 149. [2019-12-27 15:08:59,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:08:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-27 15:08:59,738 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-27 15:08:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:59,738 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-27 15:08:59,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-27 15:08:59,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:59,738 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:59,738 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:59,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:59,939 INFO L410 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:59,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:59,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942392, now seen corresponding path program 130 times [2019-12-27 15:08:59,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:59,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519199856] [2019-12-27 15:08:59,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:59,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:00,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519199856] [2019-12-27 15:09:00,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115668523] [2019-12-27 15:09:00,020 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:00,062 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:00,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:00,063 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:00,064 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:00,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:00,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:00,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2022845750] [2019-12-27 15:09:00,239 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:00,241 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:00,243 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:00,243 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:00,243 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:00,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:00,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:00,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:00,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:00,243 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 10 states. [2019-12-27 15:09:00,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:00,422 INFO L93 Difference]: Finished difference Result 206 states and 451 transitions. [2019-12-27 15:09:00,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:00,422 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:00,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:00,423 INFO L225 Difference]: With dead ends: 206 [2019-12-27 15:09:00,423 INFO L226 Difference]: Without dead ends: 205 [2019-12-27 15:09:00,424 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:00,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-27 15:09:00,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 151. [2019-12-27 15:09:00,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:09:00,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 344 transitions. [2019-12-27 15:09:00,428 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 344 transitions. Word has length 14 [2019-12-27 15:09:00,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:00,428 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 344 transitions. [2019-12-27 15:09:00,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:00,429 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 344 transitions. [2019-12-27 15:09:00,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:00,429 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:00,429 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:00,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:00,632 INFO L410 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:00,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:00,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942237, now seen corresponding path program 131 times [2019-12-27 15:09:00,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:00,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203141022] [2019-12-27 15:09:00,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:00,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203141022] [2019-12-27 15:09:00,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414291142] [2019-12-27 15:09:00,711 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:00,751 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:00,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:00,752 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:00,753 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:00,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:00,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:00,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:00,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [93442692] [2019-12-27 15:09:00,912 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:00,913 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:00,914 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:00,915 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:00,915 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:00,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:00,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:00,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:00,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:00,915 INFO L87 Difference]: Start difference. First operand 151 states and 344 transitions. Second operand 10 states. [2019-12-27 15:09:01,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:01,088 INFO L93 Difference]: Finished difference Result 206 states and 451 transitions. [2019-12-27 15:09:01,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:01,089 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:01,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:01,090 INFO L225 Difference]: With dead ends: 206 [2019-12-27 15:09:01,090 INFO L226 Difference]: Without dead ends: 205 [2019-12-27 15:09:01,090 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:01,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-27 15:09:01,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2019-12-27 15:09:01,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:09:01,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 340 transitions. [2019-12-27 15:09:01,093 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 340 transitions. Word has length 14 [2019-12-27 15:09:01,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:01,094 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 340 transitions. [2019-12-27 15:09:01,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:01,094 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 340 transitions. [2019-12-27 15:09:01,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:01,094 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:01,094 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:01,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:01,297 INFO L410 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:01,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:01,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937587, now seen corresponding path program 132 times [2019-12-27 15:09:01,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:01,298 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732535197] [2019-12-27 15:09:01,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:01,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732535197] [2019-12-27 15:09:01,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350418023] [2019-12-27 15:09:01,382 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:01,431 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 15:09:01,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:01,432 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:01,433 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:01,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:01,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:01,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1960295980] [2019-12-27 15:09:01,618 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:01,619 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:01,622 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:01,622 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:01,623 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:01,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:01,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:01,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:01,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:01,623 INFO L87 Difference]: Start difference. First operand 150 states and 340 transitions. Second operand 10 states. [2019-12-27 15:09:03,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:03,839 INFO L93 Difference]: Finished difference Result 207 states and 453 transitions. [2019-12-27 15:09:03,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:03,839 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:03,840 INFO L225 Difference]: With dead ends: 207 [2019-12-27 15:09:03,840 INFO L226 Difference]: Without dead ends: 206 [2019-12-27 15:09:03,841 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=160, Invalid=301, Unknown=1, NotChecked=0, Total=462 [2019-12-27 15:09:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-27 15:09:03,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 151. [2019-12-27 15:09:03,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:09:03,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 344 transitions. [2019-12-27 15:09:03,844 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 344 transitions. Word has length 14 [2019-12-27 15:09:03,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:03,845 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 344 transitions. [2019-12-27 15:09:03,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:03,845 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 344 transitions. [2019-12-27 15:09:03,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:03,845 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:03,845 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:04,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:04,046 INFO L410 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:04,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:04,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937432, now seen corresponding path program 133 times [2019-12-27 15:09:04,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:04,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906670187] [2019-12-27 15:09:04,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:04,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906670187] [2019-12-27 15:09:04,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928469921] [2019-12-27 15:09:04,125 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:04,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:04,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:04,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:04,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:04,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1406595323] [2019-12-27 15:09:04,367 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:04,369 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:04,371 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:04,372 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:04,372 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:04,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:04,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:04,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:04,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:04,373 INFO L87 Difference]: Start difference. First operand 151 states and 344 transitions. Second operand 10 states. [2019-12-27 15:09:04,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:04,525 INFO L93 Difference]: Finished difference Result 194 states and 423 transitions. [2019-12-27 15:09:04,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:04,526 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:04,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:04,527 INFO L225 Difference]: With dead ends: 194 [2019-12-27 15:09:04,527 INFO L226 Difference]: Without dead ends: 189 [2019-12-27 15:09:04,527 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-27 15:09:04,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 149. [2019-12-27 15:09:04,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:09:04,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 335 transitions. [2019-12-27 15:09:04,531 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 335 transitions. Word has length 14 [2019-12-27 15:09:04,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:04,531 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 335 transitions. [2019-12-27 15:09:04,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:04,531 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 335 transitions. [2019-12-27 15:09:04,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:04,531 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:04,531 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:04,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:04,739 INFO L410 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:04,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:04,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473742, now seen corresponding path program 134 times [2019-12-27 15:09:04,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:04,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939825409] [2019-12-27 15:09:04,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:04,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939825409] [2019-12-27 15:09:04,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842739152] [2019-12-27 15:09:04,818 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:04,865 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:04,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:04,866 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:04,867 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:05,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:05,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:05,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [795945425] [2019-12-27 15:09:05,043 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:05,044 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:05,046 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:05,046 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:05,046 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:05,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:05,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:05,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:05,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:05,047 INFO L87 Difference]: Start difference. First operand 149 states and 335 transitions. Second operand 10 states. [2019-12-27 15:09:05,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:05,208 INFO L93 Difference]: Finished difference Result 194 states and 422 transitions. [2019-12-27 15:09:05,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:05,208 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:05,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:05,209 INFO L225 Difference]: With dead ends: 194 [2019-12-27 15:09:05,209 INFO L226 Difference]: Without dead ends: 193 [2019-12-27 15:09:05,209 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:05,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-27 15:09:05,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 152. [2019-12-27 15:09:05,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:09:05,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 346 transitions. [2019-12-27 15:09:05,212 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 346 transitions. Word has length 14 [2019-12-27 15:09:05,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:05,213 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 346 transitions. [2019-12-27 15:09:05,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:05,213 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 346 transitions. [2019-12-27 15:09:05,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:05,213 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:05,213 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:05,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:05,414 INFO L410 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:05,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:05,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473587, now seen corresponding path program 135 times [2019-12-27 15:09:05,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:05,415 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309404595] [2019-12-27 15:09:05,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:05,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:05,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309404595] [2019-12-27 15:09:05,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60585644] [2019-12-27 15:09:05,503 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:05,546 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:09:05,546 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:05,546 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:05,547 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:15,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:15,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:15,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [910776351] [2019-12-27 15:09:15,892 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:15,892 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:15,895 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:15,895 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:15,895 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:15,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:15,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:15,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:15,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=205, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:09:15,896 INFO L87 Difference]: Start difference. First operand 152 states and 346 transitions. Second operand 10 states. [2019-12-27 15:09:16,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:16,200 INFO L93 Difference]: Finished difference Result 204 states and 449 transitions. [2019-12-27 15:09:16,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:16,201 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:16,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:16,202 INFO L225 Difference]: With dead ends: 204 [2019-12-27 15:09:16,202 INFO L226 Difference]: Without dead ends: 203 [2019-12-27 15:09:16,202 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=161, Invalid=299, Unknown=2, NotChecked=0, Total=462 [2019-12-27 15:09:16,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-27 15:09:16,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 151. [2019-12-27 15:09:16,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:09:16,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 342 transitions. [2019-12-27 15:09:16,206 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 342 transitions. Word has length 14 [2019-12-27 15:09:16,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:16,206 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 342 transitions. [2019-12-27 15:09:16,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:16,206 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 342 transitions. [2019-12-27 15:09:16,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:16,206 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:16,206 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:16,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:16,407 INFO L410 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:16,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:16,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468937, now seen corresponding path program 136 times [2019-12-27 15:09:16,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:16,408 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169863525] [2019-12-27 15:09:16,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:16,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169863525] [2019-12-27 15:09:16,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113319029] [2019-12-27 15:09:16,496 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:16,540 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:16,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:16,541 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:16,541 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:16,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:16,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:16,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [133540025] [2019-12-27 15:09:16,716 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:16,716 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:16,718 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:16,718 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:16,718 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:16,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:16,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:16,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:16,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:16,719 INFO L87 Difference]: Start difference. First operand 151 states and 342 transitions. Second operand 10 states. [2019-12-27 15:09:16,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:16,900 INFO L93 Difference]: Finished difference Result 196 states and 427 transitions. [2019-12-27 15:09:16,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:16,900 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:16,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:16,901 INFO L225 Difference]: With dead ends: 196 [2019-12-27 15:09:16,901 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:09:16,902 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:16,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:09:16,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 152. [2019-12-27 15:09:16,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:09:16,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 346 transitions. [2019-12-27 15:09:16,905 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 346 transitions. Word has length 14 [2019-12-27 15:09:16,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:16,906 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 346 transitions. [2019-12-27 15:09:16,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:16,906 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 346 transitions. [2019-12-27 15:09:16,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:16,906 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:16,906 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:17,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:17,107 INFO L410 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:17,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:17,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468782, now seen corresponding path program 137 times [2019-12-27 15:09:17,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:17,108 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104721063] [2019-12-27 15:09:17,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:17,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104721063] [2019-12-27 15:09:17,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677296881] [2019-12-27 15:09:17,198 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:17,244 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:17,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:17,244 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:17,245 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:17,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:17,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:17,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [121135730] [2019-12-27 15:09:17,427 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:17,428 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:17,431 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:17,431 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:17,431 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:17,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:17,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:17,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:17,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:17,432 INFO L87 Difference]: Start difference. First operand 152 states and 346 transitions. Second operand 10 states. [2019-12-27 15:09:17,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:17,676 INFO L93 Difference]: Finished difference Result 196 states and 430 transitions. [2019-12-27 15:09:17,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:17,676 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:17,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:17,678 INFO L225 Difference]: With dead ends: 196 [2019-12-27 15:09:17,678 INFO L226 Difference]: Without dead ends: 192 [2019-12-27 15:09:17,678 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:17,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-27 15:09:17,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2019-12-27 15:09:17,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:09:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 338 transitions. [2019-12-27 15:09:17,682 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 338 transitions. Word has length 14 [2019-12-27 15:09:17,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:17,682 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 338 transitions. [2019-12-27 15:09:17,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:17,682 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 338 transitions. [2019-12-27 15:09:17,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:17,683 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:17,683 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:17,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:17,886 INFO L410 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:17,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:17,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324787, now seen corresponding path program 138 times [2019-12-27 15:09:17,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:17,887 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531792714] [2019-12-27 15:09:17,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:17,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531792714] [2019-12-27 15:09:17,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468705162] [2019-12-27 15:09:17,976 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:18,040 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:18,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:18,041 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:18,042 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:19,017 WARN L192 SmtUtils]: Spent 590.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-27 15:09:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:19,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:19,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:19,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [835109443] [2019-12-27 15:09:19,020 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:19,022 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:19,026 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:19,026 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:19,027 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:19,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:19,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:19,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:19,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:19,028 INFO L87 Difference]: Start difference. First operand 150 states and 338 transitions. Second operand 10 states. [2019-12-27 15:09:21,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:21,367 INFO L93 Difference]: Finished difference Result 195 states and 426 transitions. [2019-12-27 15:09:21,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:21,368 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:21,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:21,369 INFO L225 Difference]: With dead ends: 195 [2019-12-27 15:09:21,369 INFO L226 Difference]: Without dead ends: 194 [2019-12-27 15:09:21,369 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=159, Invalid=302, Unknown=1, NotChecked=0, Total=462 [2019-12-27 15:09:21,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-12-27 15:09:21,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 152. [2019-12-27 15:09:21,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:09:21,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 345 transitions. [2019-12-27 15:09:21,372 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 345 transitions. Word has length 14 [2019-12-27 15:09:21,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:21,373 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 345 transitions. [2019-12-27 15:09:21,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:21,373 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 345 transitions. [2019-12-27 15:09:21,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:21,373 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:21,373 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:21,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:21,574 INFO L410 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:21,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:21,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324632, now seen corresponding path program 139 times [2019-12-27 15:09:21,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:21,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168542262] [2019-12-27 15:09:21,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:21,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168542262] [2019-12-27 15:09:21,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452157279] [2019-12-27 15:09:21,654 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:21,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:21,699 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:21,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:21,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:21,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [455784980] [2019-12-27 15:09:21,931 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:21,932 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:21,934 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:21,934 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:21,934 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:21,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:21,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:21,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:21,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:21,935 INFO L87 Difference]: Start difference. First operand 152 states and 345 transitions. Second operand 10 states. [2019-12-27 15:09:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:23,885 INFO L93 Difference]: Finished difference Result 192 states and 422 transitions. [2019-12-27 15:09:23,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:23,886 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:23,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:23,886 INFO L225 Difference]: With dead ends: 192 [2019-12-27 15:09:23,886 INFO L226 Difference]: Without dead ends: 189 [2019-12-27 15:09:23,887 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=166, Invalid=294, Unknown=2, NotChecked=0, Total=462 [2019-12-27 15:09:23,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-27 15:09:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 151. [2019-12-27 15:09:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:09:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 341 transitions. [2019-12-27 15:09:23,890 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 341 transitions. Word has length 14 [2019-12-27 15:09:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:23,891 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 341 transitions. [2019-12-27 15:09:23,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:23,891 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 341 transitions. [2019-12-27 15:09:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:23,891 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:23,891 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:24,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:24,092 INFO L410 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:24,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:24,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1832319982, now seen corresponding path program 140 times [2019-12-27 15:09:24,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:24,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072750405] [2019-12-27 15:09:24,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:24,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072750405] [2019-12-27 15:09:24,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660681033] [2019-12-27 15:09:24,178 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:24,221 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:24,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:24,221 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:24,222 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:24,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:24,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:24,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2063706787] [2019-12-27 15:09:24,423 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:24,424 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:24,426 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:24,427 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:24,427 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:24,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:24,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:24,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:24,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:24,428 INFO L87 Difference]: Start difference. First operand 151 states and 341 transitions. Second operand 10 states. [2019-12-27 15:09:28,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:28,618 INFO L93 Difference]: Finished difference Result 183 states and 401 transitions. [2019-12-27 15:09:28,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:28,618 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:28,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:28,619 INFO L225 Difference]: With dead ends: 183 [2019-12-27 15:09:28,619 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:09:28,619 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=162, Invalid=298, Unknown=2, NotChecked=0, Total=462 [2019-12-27 15:09:28,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:09:28,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 149. [2019-12-27 15:09:28,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:09:28,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 335 transitions. [2019-12-27 15:09:28,623 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 335 transitions. Word has length 14 [2019-12-27 15:09:28,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:28,623 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 335 transitions. [2019-12-27 15:09:28,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:28,623 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 335 transitions. [2019-12-27 15:09:28,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:28,624 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:28,624 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:28,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:28,827 INFO L410 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:28,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:28,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018341, now seen corresponding path program 141 times [2019-12-27 15:09:28,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:28,828 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79848568] [2019-12-27 15:09:28,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:28,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79848568] [2019-12-27 15:09:28,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807575598] [2019-12-27 15:09:28,910 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:28,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:09:28,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:28,958 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:28,958 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:29,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:29,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:29,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [461356348] [2019-12-27 15:09:29,100 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:29,101 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:29,104 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:29,104 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:29,104 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:29,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:29,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:29,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:29,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:29,105 INFO L87 Difference]: Start difference. First operand 149 states and 335 transitions. Second operand 10 states. [2019-12-27 15:09:29,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:29,333 INFO L93 Difference]: Finished difference Result 186 states and 407 transitions. [2019-12-27 15:09:29,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:29,334 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:29,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:29,334 INFO L225 Difference]: With dead ends: 186 [2019-12-27 15:09:29,335 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:09:29,335 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:29,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:09:29,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 154. [2019-12-27 15:09:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:09:29,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-27 15:09:29,338 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-27 15:09:29,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:29,339 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-27 15:09:29,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:29,339 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-27 15:09:29,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:29,339 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:29,339 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:29,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:29,540 INFO L410 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:29,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:29,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1460022991, now seen corresponding path program 142 times [2019-12-27 15:09:29,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:29,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055395134] [2019-12-27 15:09:29,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:29,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055395134] [2019-12-27 15:09:29,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475925451] [2019-12-27 15:09:29,627 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:29,672 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:29,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:29,673 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:29,673 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:29,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:29,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:29,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [409836117] [2019-12-27 15:09:29,796 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:29,797 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:29,800 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:29,800 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:29,800 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:29,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:29,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:29,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:29,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:29,801 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 10 states. [2019-12-27 15:09:30,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:30,101 INFO L93 Difference]: Finished difference Result 199 states and 435 transitions. [2019-12-27 15:09:30,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:30,102 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:30,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:30,103 INFO L225 Difference]: With dead ends: 199 [2019-12-27 15:09:30,103 INFO L226 Difference]: Without dead ends: 196 [2019-12-27 15:09:30,103 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:30,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-27 15:09:30,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 155. [2019-12-27 15:09:30,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 15:09:30,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 351 transitions. [2019-12-27 15:09:30,108 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 351 transitions. Word has length 14 [2019-12-27 15:09:30,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:30,108 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 351 transitions. [2019-12-27 15:09:30,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:30,109 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 351 transitions. [2019-12-27 15:09:30,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:30,109 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:30,109 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:30,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:30,310 INFO L410 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:30,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:30,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1460023146, now seen corresponding path program 143 times [2019-12-27 15:09:30,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:30,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194731961] [2019-12-27 15:09:30,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:30,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194731961] [2019-12-27 15:09:30,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995527898] [2019-12-27 15:09:30,391 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:30,436 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:30,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:30,438 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:30,438 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:30,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:30,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:30,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1777700833] [2019-12-27 15:09:30,546 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:30,547 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:30,549 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:30,549 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:30,549 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:30,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:30,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:30,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:30,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:30,550 INFO L87 Difference]: Start difference. First operand 155 states and 351 transitions. Second operand 10 states. [2019-12-27 15:09:30,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:30,723 INFO L93 Difference]: Finished difference Result 199 states and 438 transitions. [2019-12-27 15:09:30,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:30,723 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:30,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:30,724 INFO L225 Difference]: With dead ends: 199 [2019-12-27 15:09:30,724 INFO L226 Difference]: Without dead ends: 198 [2019-12-27 15:09:30,724 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:30,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-27 15:09:30,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 154. [2019-12-27 15:09:30,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:09:30,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-27 15:09:30,728 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-27 15:09:30,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:30,728 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-27 15:09:30,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:30,728 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-27 15:09:30,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:30,728 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:30,728 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:30,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:30,929 INFO L410 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:30,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:30,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167141, now seen corresponding path program 144 times [2019-12-27 15:09:30,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:30,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904705113] [2019-12-27 15:09:30,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:31,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904705113] [2019-12-27 15:09:31,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863186248] [2019-12-27 15:09:31,011 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:31,055 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:31,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:31,057 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:31,057 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:31,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:31,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:31,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [85559595] [2019-12-27 15:09:31,230 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:31,230 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:31,233 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:31,233 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:31,233 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:31,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:31,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:31,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:31,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:31,234 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 10 states. [2019-12-27 15:09:32,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:32,960 INFO L93 Difference]: Finished difference Result 203 states and 442 transitions. [2019-12-27 15:09:32,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:32,961 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:32,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:32,961 INFO L225 Difference]: With dead ends: 203 [2019-12-27 15:09:32,961 INFO L226 Difference]: Without dead ends: 199 [2019-12-27 15:09:32,962 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=165, Invalid=339, Unknown=2, NotChecked=0, Total=506 [2019-12-27 15:09:32,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-27 15:09:32,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 156. [2019-12-27 15:09:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 15:09:32,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 354 transitions. [2019-12-27 15:09:32,965 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 354 transitions. Word has length 14 [2019-12-27 15:09:32,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:32,966 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 354 transitions. [2019-12-27 15:09:32,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:32,966 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 354 transitions. [2019-12-27 15:09:32,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:32,966 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:32,966 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:33,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:33,167 INFO L410 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:33,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:33,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167296, now seen corresponding path program 145 times [2019-12-27 15:09:33,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:33,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210660574] [2019-12-27 15:09:33,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:33,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210660574] [2019-12-27 15:09:33,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763685404] [2019-12-27 15:09:33,253 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:33,297 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:33,297 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:33,869 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_468 Int)) (and (<= (div (+ (* v_~i~0_468 (- 1)) 1) (- 3)) 2) (<= c_~j~0 (+ v_~i~0_468 2)) (<= c_~i~0 (+ v_~i~0_468 c_~j~0)))) is different from true [2019-12-27 15:09:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-12-27 15:09:36,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:36,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:36,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [391275734] [2019-12-27 15:09:36,110 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:36,111 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:36,113 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:36,113 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:36,113 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:36,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:36,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:36,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:36,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=188, Unknown=1, NotChecked=30, Total=306 [2019-12-27 15:09:36,114 INFO L87 Difference]: Start difference. First operand 156 states and 354 transitions. Second operand 10 states. [2019-12-27 15:09:36,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:36,734 INFO L93 Difference]: Finished difference Result 206 states and 452 transitions. [2019-12-27 15:09:36,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:36,735 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:36,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:36,735 INFO L225 Difference]: With dead ends: 206 [2019-12-27 15:09:36,735 INFO L226 Difference]: Without dead ends: 205 [2019-12-27 15:09:36,736 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=159, Invalid=305, Unknown=2, NotChecked=40, Total=506 [2019-12-27 15:09:36,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-27 15:09:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 155. [2019-12-27 15:09:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 15:09:36,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 351 transitions. [2019-12-27 15:09:36,740 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 351 transitions. Word has length 14 [2019-12-27 15:09:36,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:36,740 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 351 transitions. [2019-12-27 15:09:36,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:36,740 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 351 transitions. [2019-12-27 15:09:36,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:36,740 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:36,740 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:36,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:36,941 INFO L410 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:36,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1460171946, now seen corresponding path program 146 times [2019-12-27 15:09:36,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:36,942 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413027842] [2019-12-27 15:09:36,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:37,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413027842] [2019-12-27 15:09:37,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859482902] [2019-12-27 15:09:37,031 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:37,075 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:37,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:37,076 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:37,077 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:37,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:37,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:37,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:37,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [837901331] [2019-12-27 15:09:37,196 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:37,197 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:37,198 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:37,198 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:37,198 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:37,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:37,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:37,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:37,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:37,199 INFO L87 Difference]: Start difference. First operand 155 states and 351 transitions. Second operand 10 states. [2019-12-27 15:09:37,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:37,431 INFO L93 Difference]: Finished difference Result 212 states and 466 transitions. [2019-12-27 15:09:37,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:37,431 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:37,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:37,432 INFO L225 Difference]: With dead ends: 212 [2019-12-27 15:09:37,432 INFO L226 Difference]: Without dead ends: 211 [2019-12-27 15:09:37,433 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:37,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-27 15:09:37,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 156. [2019-12-27 15:09:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 15:09:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 355 transitions. [2019-12-27 15:09:37,436 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 355 transitions. Word has length 14 [2019-12-27 15:09:37,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:37,437 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 355 transitions. [2019-12-27 15:09:37,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:37,437 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 355 transitions. [2019-12-27 15:09:37,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:37,437 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:37,437 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:37,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:37,638 INFO L410 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:37,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:37,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1460172101, now seen corresponding path program 147 times [2019-12-27 15:09:37,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:37,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192180756] [2019-12-27 15:09:37,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:37,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192180756] [2019-12-27 15:09:37,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443250963] [2019-12-27 15:09:37,761 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:37,829 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:09:37,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:37,830 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:37,831 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:38,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:38,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:38,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [440864204] [2019-12-27 15:09:38,039 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:38,041 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:38,044 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:38,044 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:38,045 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:38,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:38,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:38,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:38,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:38,046 INFO L87 Difference]: Start difference. First operand 156 states and 355 transitions. Second operand 10 states. [2019-12-27 15:09:38,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:38,306 INFO L93 Difference]: Finished difference Result 200 states and 439 transitions. [2019-12-27 15:09:38,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:38,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:38,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:38,307 INFO L225 Difference]: With dead ends: 200 [2019-12-27 15:09:38,307 INFO L226 Difference]: Without dead ends: 199 [2019-12-27 15:09:38,307 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-27 15:09:38,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 154. [2019-12-27 15:09:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:09:38,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-27 15:09:38,311 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-27 15:09:38,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:38,311 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-27 15:09:38,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:38,311 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-27 15:09:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:38,312 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:38,312 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:38,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:38,515 INFO L410 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:38,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:38,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635791, now seen corresponding path program 148 times [2019-12-27 15:09:38,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:38,516 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675803748] [2019-12-27 15:09:38,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:38,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675803748] [2019-12-27 15:09:38,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087443077] [2019-12-27 15:09:38,665 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:38,738 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:38,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:38,739 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:38,740 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:39,881 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_478 Int)) (and (<= c_~i~0 (+ v_~i~0_478 (* 2 c_~j~0))) (<= (div (+ (* v_~i~0_478 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ v_~i~0_478 2)))) is different from true [2019-12-27 15:09:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2019-12-27 15:09:40,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:40,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:40,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [750361880] [2019-12-27 15:09:40,775 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:40,777 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:40,780 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:40,781 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:40,781 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:40,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:40,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:40,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:40,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=189, Unknown=2, NotChecked=30, Total=306 [2019-12-27 15:09:40,782 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 10 states. [2019-12-27 15:09:42,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:42,138 INFO L93 Difference]: Finished difference Result 207 states and 453 transitions. [2019-12-27 15:09:42,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:42,138 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:42,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:42,139 INFO L225 Difference]: With dead ends: 207 [2019-12-27 15:09:42,139 INFO L226 Difference]: Without dead ends: 202 [2019-12-27 15:09:42,140 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=4, NotChecked=40, Total=506 [2019-12-27 15:09:42,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-12-27 15:09:42,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 157. [2019-12-27 15:09:42,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 15:09:42,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 357 transitions. [2019-12-27 15:09:42,143 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 357 transitions. Word has length 14 [2019-12-27 15:09:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:42,144 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 357 transitions. [2019-12-27 15:09:42,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:42,144 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 357 transitions. [2019-12-27 15:09:42,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:42,144 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:42,144 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:42,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:42,345 INFO L410 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:42,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:42,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635946, now seen corresponding path program 149 times [2019-12-27 15:09:42,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:42,346 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832928704] [2019-12-27 15:09:42,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:42,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832928704] [2019-12-27 15:09:42,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549279218] [2019-12-27 15:09:42,430 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:42,473 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:42,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:42,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:42,475 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:42,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:42,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:42,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [381231431] [2019-12-27 15:09:42,718 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:42,719 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:42,721 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:42,721 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:42,721 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:42,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:42,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:42,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:42,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:42,722 INFO L87 Difference]: Start difference. First operand 157 states and 357 transitions. Second operand 10 states. [2019-12-27 15:09:43,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:43,518 INFO L93 Difference]: Finished difference Result 212 states and 467 transitions. [2019-12-27 15:09:43,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:43,518 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:43,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:43,519 INFO L225 Difference]: With dead ends: 212 [2019-12-27 15:09:43,519 INFO L226 Difference]: Without dead ends: 211 [2019-12-27 15:09:43,519 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:43,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-27 15:09:43,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 156. [2019-12-27 15:09:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 15:09:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 354 transitions. [2019-12-27 15:09:43,523 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 354 transitions. Word has length 14 [2019-12-27 15:09:43,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:43,523 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 354 transitions. [2019-12-27 15:09:43,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:43,523 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 354 transitions. [2019-12-27 15:09:43,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:43,523 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:43,523 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:43,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:43,724 INFO L410 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:43,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640596, now seen corresponding path program 150 times [2019-12-27 15:09:43,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:43,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247816839] [2019-12-27 15:09:43,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:43,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247816839] [2019-12-27 15:09:43,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83779030] [2019-12-27 15:09:43,811 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:43,855 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:43,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:43,856 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:43,857 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:44,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:44,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:44,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [178777674] [2019-12-27 15:09:44,020 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:44,021 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:44,023 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:44,023 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:44,023 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:44,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:44,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:44,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:44,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:44,024 INFO L87 Difference]: Start difference. First operand 156 states and 354 transitions. Second operand 10 states. [2019-12-27 15:09:44,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:44,243 INFO L93 Difference]: Finished difference Result 215 states and 473 transitions. [2019-12-27 15:09:44,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:44,243 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:44,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:44,244 INFO L225 Difference]: With dead ends: 215 [2019-12-27 15:09:44,244 INFO L226 Difference]: Without dead ends: 214 [2019-12-27 15:09:44,245 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:44,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-12-27 15:09:44,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 157. [2019-12-27 15:09:44,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 15:09:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 358 transitions. [2019-12-27 15:09:44,248 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 358 transitions. Word has length 14 [2019-12-27 15:09:44,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:44,249 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 358 transitions. [2019-12-27 15:09:44,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:44,249 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 358 transitions. [2019-12-27 15:09:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:44,249 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:44,249 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:44,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:44,452 INFO L410 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:44,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640751, now seen corresponding path program 151 times [2019-12-27 15:09:44,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:44,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968543883] [2019-12-27 15:09:44,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:44,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968543883] [2019-12-27 15:09:44,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482949638] [2019-12-27 15:09:44,536 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:44,585 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:44,585 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:45,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:45,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:45,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1461093275] [2019-12-27 15:09:45,263 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:45,264 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:45,267 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:45,267 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:45,267 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:45,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:45,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:45,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:45,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=212, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:09:45,268 INFO L87 Difference]: Start difference. First operand 157 states and 358 transitions. Second operand 10 states. [2019-12-27 15:09:46,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:46,432 INFO L93 Difference]: Finished difference Result 205 states and 451 transitions. [2019-12-27 15:09:46,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:46,433 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:46,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:46,433 INFO L225 Difference]: With dead ends: 205 [2019-12-27 15:09:46,433 INFO L226 Difference]: Without dead ends: 204 [2019-12-27 15:09:46,434 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=166, Invalid=338, Unknown=2, NotChecked=0, Total=506 [2019-12-27 15:09:46,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-27 15:09:46,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 155. [2019-12-27 15:09:46,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 15:09:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 351 transitions. [2019-12-27 15:09:46,436 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 351 transitions. Word has length 14 [2019-12-27 15:09:46,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:46,436 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 351 transitions. [2019-12-27 15:09:46,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 351 transitions. [2019-12-27 15:09:46,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:46,437 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:46,437 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:46,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:46,638 INFO L410 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:46,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:46,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784746, now seen corresponding path program 152 times [2019-12-27 15:09:46,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:46,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742517903] [2019-12-27 15:09:46,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:46,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742517903] [2019-12-27 15:09:46,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721830646] [2019-12-27 15:09:46,713 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:46,754 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:46,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:46,755 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:46,755 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:46,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:46,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:46,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [192207473] [2019-12-27 15:09:46,906 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:46,907 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:46,909 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:46,909 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:46,909 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:46,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:46,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:46,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:46,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:46,910 INFO L87 Difference]: Start difference. First operand 155 states and 351 transitions. Second operand 10 states. [2019-12-27 15:09:47,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:47,132 INFO L93 Difference]: Finished difference Result 219 states and 484 transitions. [2019-12-27 15:09:47,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:47,132 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:47,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:47,133 INFO L225 Difference]: With dead ends: 219 [2019-12-27 15:09:47,133 INFO L226 Difference]: Without dead ends: 218 [2019-12-27 15:09:47,133 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:47,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-27 15:09:47,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 157. [2019-12-27 15:09:47,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 15:09:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 359 transitions. [2019-12-27 15:09:47,137 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 359 transitions. Word has length 14 [2019-12-27 15:09:47,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:47,137 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 359 transitions. [2019-12-27 15:09:47,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:47,138 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 359 transitions. [2019-12-27 15:09:47,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:47,138 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:47,138 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:47,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:47,339 INFO L410 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:47,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:47,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784901, now seen corresponding path program 153 times [2019-12-27 15:09:47,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:47,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354362741] [2019-12-27 15:09:47,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:47,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354362741] [2019-12-27 15:09:47,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58294685] [2019-12-27 15:09:47,435 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:47,481 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:09:47,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:47,483 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 15:09:47,483 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:48,030 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_498 Int)) (and (<= (div (+ (* v_~i~0_498 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ (* 2 v_~i~0_498) c_~i~0 2)) (<= (* 2 c_~i~0) (+ v_~i~0_498 c_~j~0)))) is different from true [2019-12-27 15:09:48,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:48,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:48,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:48,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1348299663] [2019-12-27 15:09:48,032 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:48,032 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:48,034 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:48,034 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:48,034 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:48,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:48,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:48,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:48,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=187, Unknown=1, NotChecked=30, Total=306 [2019-12-27 15:09:48,035 INFO L87 Difference]: Start difference. First operand 157 states and 359 transitions. Second operand 10 states. [2019-12-27 15:09:48,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:48,262 INFO L93 Difference]: Finished difference Result 206 states and 451 transitions. [2019-12-27 15:09:48,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:09:48,262 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:48,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:48,262 INFO L225 Difference]: With dead ends: 206 [2019-12-27 15:09:48,263 INFO L226 Difference]: Without dead ends: 205 [2019-12-27 15:09:48,263 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=335, Unknown=1, NotChecked=42, Total=552 [2019-12-27 15:09:48,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-27 15:09:48,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 156. [2019-12-27 15:09:48,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 15:09:48,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 355 transitions. [2019-12-27 15:09:48,266 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 355 transitions. Word has length 14 [2019-12-27 15:09:48,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:48,267 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 355 transitions. [2019-12-27 15:09:48,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:48,267 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 355 transitions. [2019-12-27 15:09:48,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:48,268 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:48,268 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:48,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:48,471 INFO L410 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:48,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:48,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1464789551, now seen corresponding path program 154 times [2019-12-27 15:09:48,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:48,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588572296] [2019-12-27 15:09:48,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:48,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588572296] [2019-12-27 15:09:48,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970672104] [2019-12-27 15:09:48,562 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:48,605 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:48,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:48,606 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:48,607 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:49,260 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-12-27 15:09:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:49,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:49,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:49,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1852147132] [2019-12-27 15:09:49,261 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:49,262 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:49,264 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:49,264 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:49,264 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:49,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:49,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:49,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:49,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:49,264 INFO L87 Difference]: Start difference. First operand 156 states and 355 transitions. Second operand 10 states. [2019-12-27 15:09:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:49,467 INFO L93 Difference]: Finished difference Result 211 states and 466 transitions. [2019-12-27 15:09:49,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:49,468 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:49,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:49,468 INFO L225 Difference]: With dead ends: 211 [2019-12-27 15:09:49,468 INFO L226 Difference]: Without dead ends: 210 [2019-12-27 15:09:49,469 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-27 15:09:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 157. [2019-12-27 15:09:49,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 15:09:49,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 359 transitions. [2019-12-27 15:09:49,472 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 359 transitions. Word has length 14 [2019-12-27 15:09:49,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:49,472 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 359 transitions. [2019-12-27 15:09:49,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 359 transitions. [2019-12-27 15:09:49,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:49,473 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:49,473 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:49,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:49,674 INFO L410 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:49,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:49,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1464789706, now seen corresponding path program 155 times [2019-12-27 15:09:49,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:49,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097167059] [2019-12-27 15:09:49,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:49,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097167059] [2019-12-27 15:09:49,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471563126] [2019-12-27 15:09:49,764 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:49,812 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:09:49,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:49,814 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:49,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:49,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:49,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:49,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [20962739] [2019-12-27 15:09:49,954 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:49,955 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:49,957 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:49,957 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:49,957 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:49,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:49,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:49,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:49,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:49,958 INFO L87 Difference]: Start difference. First operand 157 states and 359 transitions. Second operand 10 states. [2019-12-27 15:09:50,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:50,115 INFO L93 Difference]: Finished difference Result 190 states and 417 transitions. [2019-12-27 15:09:50,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:50,116 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:50,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:50,117 INFO L225 Difference]: With dead ends: 190 [2019-12-27 15:09:50,117 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:09:50,117 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:50,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:09:50,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 154. [2019-12-27 15:09:50,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:09:50,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 347 transitions. [2019-12-27 15:09:50,120 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 347 transitions. Word has length 14 [2019-12-27 15:09:50,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:50,121 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 347 transitions. [2019-12-27 15:09:50,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:50,121 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 347 transitions. [2019-12-27 15:09:50,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:50,121 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:50,121 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:50,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:50,322 INFO L410 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:50,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:50,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1603163941, now seen corresponding path program 156 times [2019-12-27 15:09:50,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:50,323 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628595087] [2019-12-27 15:09:50,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:50,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628595087] [2019-12-27 15:09:50,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839219674] [2019-12-27 15:09:50,400 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:50,444 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:50,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:50,445 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:50,445 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:50,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:50,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:50,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1356564540] [2019-12-27 15:09:50,566 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:50,567 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:50,569 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:50,569 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:50,569 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:50,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:50,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:50,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:50,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:50,570 INFO L87 Difference]: Start difference. First operand 154 states and 347 transitions. Second operand 10 states. [2019-12-27 15:09:50,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:50,726 INFO L93 Difference]: Finished difference Result 195 states and 423 transitions. [2019-12-27 15:09:50,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:50,727 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:50,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:50,728 INFO L225 Difference]: With dead ends: 195 [2019-12-27 15:09:50,728 INFO L226 Difference]: Without dead ends: 189 [2019-12-27 15:09:50,728 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:50,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-27 15:09:50,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 158. [2019-12-27 15:09:50,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 15:09:50,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 358 transitions. [2019-12-27 15:09:50,731 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 358 transitions. Word has length 14 [2019-12-27 15:09:50,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:50,731 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 358 transitions. [2019-12-27 15:09:50,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:50,732 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 358 transitions. [2019-12-27 15:09:50,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:50,732 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:50,732 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:50,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:50,933 INFO L410 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:50,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:50,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1603164096, now seen corresponding path program 157 times [2019-12-27 15:09:50,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:50,934 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762751496] [2019-12-27 15:09:50,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:51,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762751496] [2019-12-27 15:09:51,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475359584] [2019-12-27 15:09:51,034 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:51,092 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:51,094 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:51,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:51,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:51,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [213292121] [2019-12-27 15:09:51,300 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:51,301 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:51,304 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:51,305 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:51,305 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:51,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:51,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:51,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:51,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:51,306 INFO L87 Difference]: Start difference. First operand 158 states and 358 transitions. Second operand 10 states. [2019-12-27 15:09:51,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:51,556 INFO L93 Difference]: Finished difference Result 212 states and 469 transitions. [2019-12-27 15:09:51,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:51,556 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:51,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:51,557 INFO L225 Difference]: With dead ends: 212 [2019-12-27 15:09:51,557 INFO L226 Difference]: Without dead ends: 211 [2019-12-27 15:09:51,557 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:51,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-27 15:09:51,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 157. [2019-12-27 15:09:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 15:09:51,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 355 transitions. [2019-12-27 15:09:51,560 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 355 transitions. Word has length 14 [2019-12-27 15:09:51,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:51,561 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 355 transitions. [2019-12-27 15:09:51,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:51,561 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 355 transitions. [2019-12-27 15:09:51,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:51,561 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:51,561 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:51,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:51,765 INFO L410 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:51,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:51,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168746, now seen corresponding path program 158 times [2019-12-27 15:09:51,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:51,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772045628] [2019-12-27 15:09:51,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:51,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:51,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772045628] [2019-12-27 15:09:51,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441535905] [2019-12-27 15:09:51,877 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:51,922 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:51,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:51,923 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:51,923 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:52,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:52,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:52,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1066077435] [2019-12-27 15:09:52,073 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:52,073 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:52,075 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:52,076 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:52,076 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:52,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:52,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:52,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:52,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:52,077 INFO L87 Difference]: Start difference. First operand 157 states and 355 transitions. Second operand 10 states. [2019-12-27 15:09:52,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:52,751 INFO L93 Difference]: Finished difference Result 204 states and 444 transitions. [2019-12-27 15:09:52,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:09:52,752 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:52,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:52,752 INFO L225 Difference]: With dead ends: 204 [2019-12-27 15:09:52,753 INFO L226 Difference]: Without dead ends: 203 [2019-12-27 15:09:52,753 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=179, Invalid=372, Unknown=1, NotChecked=0, Total=552 [2019-12-27 15:09:52,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-27 15:09:52,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 158. [2019-12-27 15:09:52,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 15:09:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 359 transitions. [2019-12-27 15:09:52,756 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 359 transitions. Word has length 14 [2019-12-27 15:09:52,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:52,756 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 359 transitions. [2019-12-27 15:09:52,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:52,756 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 359 transitions. [2019-12-27 15:09:52,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:52,757 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:52,757 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:52,957 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:52,958 INFO L410 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:52,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:52,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168901, now seen corresponding path program 159 times [2019-12-27 15:09:52,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:52,959 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354748424] [2019-12-27 15:09:52,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:53,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354748424] [2019-12-27 15:09:53,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929520959] [2019-12-27 15:09:53,065 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:53,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:09:53,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:53,110 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:53,110 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:53,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:53,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:53,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [339266765] [2019-12-27 15:09:53,229 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:53,230 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:53,231 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:53,231 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:53,231 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:53,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:53,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:53,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:53,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:53,232 INFO L87 Difference]: Start difference. First operand 158 states and 359 transitions. Second operand 10 states. [2019-12-27 15:09:53,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:53,415 INFO L93 Difference]: Finished difference Result 216 states and 479 transitions. [2019-12-27 15:09:53,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:53,415 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:53,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:53,416 INFO L225 Difference]: With dead ends: 216 [2019-12-27 15:09:53,416 INFO L226 Difference]: Without dead ends: 215 [2019-12-27 15:09:53,416 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:53,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-27 15:09:53,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 156. [2019-12-27 15:09:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 15:09:53,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 352 transitions. [2019-12-27 15:09:53,420 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 352 transitions. Word has length 14 [2019-12-27 15:09:53,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:53,420 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 352 transitions. [2019-12-27 15:09:53,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:53,420 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 352 transitions. [2019-12-27 15:09:53,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:53,421 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:53,421 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:53,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:53,622 INFO L410 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:53,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:53,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1603312896, now seen corresponding path program 160 times [2019-12-27 15:09:53,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:53,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246536883] [2019-12-27 15:09:53,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:53,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246536883] [2019-12-27 15:09:53,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114151398] [2019-12-27 15:09:53,698 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:53,740 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:53,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:53,741 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:53,741 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:53,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:53,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:53,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [131819868] [2019-12-27 15:09:53,841 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:53,842 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:53,844 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:53,844 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:53,844 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:53,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:53,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:53,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:53,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:53,844 INFO L87 Difference]: Start difference. First operand 156 states and 352 transitions. Second operand 10 states. [2019-12-27 15:09:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:54,026 INFO L93 Difference]: Finished difference Result 206 states and 448 transitions. [2019-12-27 15:09:54,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:54,027 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:54,027 INFO L225 Difference]: With dead ends: 206 [2019-12-27 15:09:54,027 INFO L226 Difference]: Without dead ends: 205 [2019-12-27 15:09:54,027 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:54,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-27 15:09:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 158. [2019-12-27 15:09:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 15:09:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 360 transitions. [2019-12-27 15:09:54,031 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 360 transitions. Word has length 14 [2019-12-27 15:09:54,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:54,031 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 360 transitions. [2019-12-27 15:09:54,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:54,031 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 360 transitions. [2019-12-27 15:09:54,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:54,031 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:54,032 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:54,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:54,232 INFO L410 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:54,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:54,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1603313051, now seen corresponding path program 161 times [2019-12-27 15:09:54,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:54,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908886960] [2019-12-27 15:09:54,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:54,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908886960] [2019-12-27 15:09:54,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875294659] [2019-12-27 15:09:54,317 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:54,359 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:54,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:54,360 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:54,360 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:54,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:54,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:54,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1782652326] [2019-12-27 15:09:54,464 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:54,464 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:54,466 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:54,466 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:54,467 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:54,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:54,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:54,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:54,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:54,467 INFO L87 Difference]: Start difference. First operand 158 states and 360 transitions. Second operand 10 states. [2019-12-27 15:09:54,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:54,657 INFO L93 Difference]: Finished difference Result 212 states and 467 transitions. [2019-12-27 15:09:54,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:54,663 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:54,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:54,664 INFO L225 Difference]: With dead ends: 212 [2019-12-27 15:09:54,664 INFO L226 Difference]: Without dead ends: 211 [2019-12-27 15:09:54,664 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:54,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-27 15:09:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 157. [2019-12-27 15:09:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 15:09:54,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 356 transitions. [2019-12-27 15:09:54,667 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 356 transitions. Word has length 14 [2019-12-27 15:09:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:54,667 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 356 transitions. [2019-12-27 15:09:54,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:54,668 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 356 transitions. [2019-12-27 15:09:54,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:54,668 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:54,668 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:54,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:54,871 INFO L410 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:54,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:54,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317701, now seen corresponding path program 162 times [2019-12-27 15:09:54,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:54,872 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744783972] [2019-12-27 15:09:54,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:54,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:54,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744783972] [2019-12-27 15:09:54,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952753000] [2019-12-27 15:09:54,962 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:55,006 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:55,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:55,007 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:55,008 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:55,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:55,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:55,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [904507700] [2019-12-27 15:09:55,111 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:55,111 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:55,113 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:55,113 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:55,114 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:55,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:55,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:55,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:55,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:55,114 INFO L87 Difference]: Start difference. First operand 157 states and 356 transitions. Second operand 10 states. [2019-12-27 15:09:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:55,312 INFO L93 Difference]: Finished difference Result 210 states and 460 transitions. [2019-12-27 15:09:55,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:55,312 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:55,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:55,313 INFO L225 Difference]: With dead ends: 210 [2019-12-27 15:09:55,313 INFO L226 Difference]: Without dead ends: 209 [2019-12-27 15:09:55,313 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:55,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-12-27 15:09:55,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 158. [2019-12-27 15:09:55,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 15:09:55,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 360 transitions. [2019-12-27 15:09:55,316 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 360 transitions. Word has length 14 [2019-12-27 15:09:55,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:55,317 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 360 transitions. [2019-12-27 15:09:55,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:55,317 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 360 transitions. [2019-12-27 15:09:55,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:55,317 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:55,317 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:55,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:55,518 INFO L410 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:55,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:55,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317856, now seen corresponding path program 163 times [2019-12-27 15:09:55,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:55,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536334019] [2019-12-27 15:09:55,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:55,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536334019] [2019-12-27 15:09:55,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772010915] [2019-12-27 15:09:55,603 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:55,648 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:55,648 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:55,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:55,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:55,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1668632319] [2019-12-27 15:09:55,762 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:55,763 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:55,765 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:55,765 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:55,765 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:55,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:55,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:55,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:55,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:55,766 INFO L87 Difference]: Start difference. First operand 158 states and 360 transitions. Second operand 10 states. [2019-12-27 15:09:55,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:55,941 INFO L93 Difference]: Finished difference Result 200 states and 439 transitions. [2019-12-27 15:09:55,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:55,942 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:55,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:55,942 INFO L225 Difference]: With dead ends: 200 [2019-12-27 15:09:55,942 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:09:55,943 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:55,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:09:55,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 155. [2019-12-27 15:09:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 15:09:55,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 349 transitions. [2019-12-27 15:09:55,946 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 349 transitions. Word has length 14 [2019-12-27 15:09:55,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:55,947 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 349 transitions. [2019-12-27 15:09:55,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:55,947 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 349 transitions. [2019-12-27 15:09:55,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:55,947 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:55,947 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:56,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:56,148 INFO L410 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:56,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:56,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781546, now seen corresponding path program 164 times [2019-12-27 15:09:56,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:56,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679937154] [2019-12-27 15:09:56,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:56,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679937154] [2019-12-27 15:09:56,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140902746] [2019-12-27 15:09:56,226 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:56,267 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:56,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:56,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:56,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:56,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:56,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:56,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1207750985] [2019-12-27 15:09:56,375 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:56,375 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:56,377 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:56,377 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:56,377 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:56,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:56,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:56,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:56,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:56,378 INFO L87 Difference]: Start difference. First operand 155 states and 349 transitions. Second operand 10 states. [2019-12-27 15:09:56,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:56,546 INFO L93 Difference]: Finished difference Result 207 states and 450 transitions. [2019-12-27 15:09:56,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:56,546 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:56,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:56,547 INFO L225 Difference]: With dead ends: 207 [2019-12-27 15:09:56,547 INFO L226 Difference]: Without dead ends: 206 [2019-12-27 15:09:56,547 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:56,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-27 15:09:56,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 158. [2019-12-27 15:09:56,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 15:09:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 360 transitions. [2019-12-27 15:09:56,551 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 360 transitions. Word has length 14 [2019-12-27 15:09:56,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:56,551 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 360 transitions. [2019-12-27 15:09:56,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:56,551 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 360 transitions. [2019-12-27 15:09:56,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:56,552 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:56,552 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:56,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:56,753 INFO L410 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:56,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:56,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781701, now seen corresponding path program 165 times [2019-12-27 15:09:56,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:56,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599811653] [2019-12-27 15:09:56,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:56,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599811653] [2019-12-27 15:09:56,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928373939] [2019-12-27 15:09:56,835 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:56,880 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:09:56,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:56,880 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 15:09:56,881 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:56,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:56,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:56,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [470937439] [2019-12-27 15:09:56,985 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:56,986 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:56,987 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:56,987 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:56,988 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:56,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:56,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:56,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:56,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:56,988 INFO L87 Difference]: Start difference. First operand 158 states and 360 transitions. Second operand 10 states. [2019-12-27 15:09:57,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:57,223 INFO L93 Difference]: Finished difference Result 215 states and 475 transitions. [2019-12-27 15:09:57,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:57,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:57,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:57,224 INFO L225 Difference]: With dead ends: 215 [2019-12-27 15:09:57,224 INFO L226 Difference]: Without dead ends: 214 [2019-12-27 15:09:57,224 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:57,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-12-27 15:09:57,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 157. [2019-12-27 15:09:57,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 15:09:57,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 356 transitions. [2019-12-27 15:09:57,228 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 356 transitions. Word has length 14 [2019-12-27 15:09:57,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:57,228 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 356 transitions. [2019-12-27 15:09:57,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:57,228 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 356 transitions. [2019-12-27 15:09:57,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:57,228 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:57,228 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:57,429 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:57,429 INFO L410 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:57,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:57,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1607786351, now seen corresponding path program 166 times [2019-12-27 15:09:57,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:57,430 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783826732] [2019-12-27 15:09:57,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:57,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783826732] [2019-12-27 15:09:57,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85421967] [2019-12-27 15:09:57,516 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:57,559 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:57,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:57,560 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:57,560 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:58,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:58,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:58,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1740941212] [2019-12-27 15:09:58,423 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:58,423 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:58,425 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:58,425 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:58,426 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:58,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:58,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:58,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:58,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:58,426 INFO L87 Difference]: Start difference. First operand 157 states and 356 transitions. Second operand 10 states. [2019-12-27 15:09:59,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:59,756 INFO L93 Difference]: Finished difference Result 207 states and 453 transitions. [2019-12-27 15:09:59,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:59,756 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:59,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:59,756 INFO L225 Difference]: With dead ends: 207 [2019-12-27 15:09:59,757 INFO L226 Difference]: Without dead ends: 206 [2019-12-27 15:09:59,757 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=168, Invalid=336, Unknown=2, NotChecked=0, Total=506 [2019-12-27 15:09:59,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-27 15:09:59,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 158. [2019-12-27 15:09:59,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 15:09:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 360 transitions. [2019-12-27 15:09:59,760 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 360 transitions. Word has length 14 [2019-12-27 15:09:59,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:59,760 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 360 transitions. [2019-12-27 15:09:59,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:59,761 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 360 transitions. [2019-12-27 15:09:59,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:59,761 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:59,761 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:59,961 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:59,962 INFO L410 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:59,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:59,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1607786506, now seen corresponding path program 167 times [2019-12-27 15:09:59,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:59,963 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019476182] [2019-12-27 15:09:59,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:00,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019476182] [2019-12-27 15:10:00,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69389276] [2019-12-27 15:10:00,042 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:00,086 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:10:00,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:00,088 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:00,088 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:00,442 WARN L192 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-27 15:10:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:01,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:01,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:01,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1256281890] [2019-12-27 15:10:01,570 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:01,571 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:01,573 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:01,573 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:01,574 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:01,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:01,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:01,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:01,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=209, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:10:01,574 INFO L87 Difference]: Start difference. First operand 158 states and 360 transitions. Second operand 10 states. [2019-12-27 15:10:02,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:02,985 INFO L93 Difference]: Finished difference Result 203 states and 443 transitions. [2019-12-27 15:10:02,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:02,986 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:02,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:02,987 INFO L225 Difference]: With dead ends: 203 [2019-12-27 15:10:02,987 INFO L226 Difference]: Without dead ends: 199 [2019-12-27 15:10:02,987 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=171, Invalid=331, Unknown=4, NotChecked=0, Total=506 [2019-12-27 15:10:02,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-27 15:10:02,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 156. [2019-12-27 15:10:02,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 15:10:02,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 352 transitions. [2019-12-27 15:10:02,990 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 352 transitions. Word has length 14 [2019-12-27 15:10:02,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:02,991 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 352 transitions. [2019-12-27 15:10:02,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:02,991 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 352 transitions. [2019-12-27 15:10:02,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:02,991 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:02,991 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:03,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:03,194 INFO L410 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:03,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1607930501, now seen corresponding path program 168 times [2019-12-27 15:10:03,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:03,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838729762] [2019-12-27 15:10:03,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:03,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838729762] [2019-12-27 15:10:03,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111125769] [2019-12-27 15:10:03,274 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:03,318 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:10:03,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:03,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:03,319 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:03,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:03,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:03,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1425543872] [2019-12-27 15:10:03,430 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:03,431 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:03,433 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:03,433 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:03,433 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:03,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:03,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:03,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:03,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:03,434 INFO L87 Difference]: Start difference. First operand 156 states and 352 transitions. Second operand 10 states. [2019-12-27 15:10:03,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:03,623 INFO L93 Difference]: Finished difference Result 203 states and 443 transitions. [2019-12-27 15:10:03,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:03,624 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:03,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:03,624 INFO L225 Difference]: With dead ends: 203 [2019-12-27 15:10:03,624 INFO L226 Difference]: Without dead ends: 202 [2019-12-27 15:10:03,625 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-12-27 15:10:03,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 158. [2019-12-27 15:10:03,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 15:10:03,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 359 transitions. [2019-12-27 15:10:03,628 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 359 transitions. Word has length 14 [2019-12-27 15:10:03,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:03,628 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 359 transitions. [2019-12-27 15:10:03,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:03,628 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 359 transitions. [2019-12-27 15:10:03,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:03,628 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:03,629 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:03,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:03,829 INFO L410 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:03,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:03,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1607930656, now seen corresponding path program 169 times [2019-12-27 15:10:03,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:03,830 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254584307] [2019-12-27 15:10:03,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:03,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254584307] [2019-12-27 15:10:03,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693743820] [2019-12-27 15:10:03,912 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:03,960 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:03,960 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:04,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:04,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:04,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:04,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1908459589] [2019-12-27 15:10:04,149 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:04,150 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:04,153 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:04,154 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:04,154 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:04,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:04,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:04,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:04,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:04,164 INFO L87 Difference]: Start difference. First operand 158 states and 359 transitions. Second operand 10 states. [2019-12-27 15:10:05,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:05,118 INFO L93 Difference]: Finished difference Result 200 states and 437 transitions. [2019-12-27 15:10:05,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:05,118 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:05,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:05,119 INFO L225 Difference]: With dead ends: 200 [2019-12-27 15:10:05,119 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 15:10:05,119 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=171, Invalid=334, Unknown=1, NotChecked=0, Total=506 [2019-12-27 15:10:05,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 15:10:05,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2019-12-27 15:10:05,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 15:10:05,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 355 transitions. [2019-12-27 15:10:05,123 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 355 transitions. Word has length 14 [2019-12-27 15:10:05,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:05,124 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 355 transitions. [2019-12-27 15:10:05,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:05,124 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 355 transitions. [2019-12-27 15:10:05,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:05,124 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:05,124 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:05,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:05,327 INFO L410 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:05,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:05,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1607935306, now seen corresponding path program 170 times [2019-12-27 15:10:05,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:05,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314165136] [2019-12-27 15:10:05,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:05,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314165136] [2019-12-27 15:10:05,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658620388] [2019-12-27 15:10:05,417 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:05,475 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:10:05,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:05,476 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:05,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:05,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:05,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:05,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1297604121] [2019-12-27 15:10:05,652 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:05,653 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:05,656 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:05,657 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:05,657 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:05,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:05,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:05,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:05,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:05,658 INFO L87 Difference]: Start difference. First operand 157 states and 355 transitions. Second operand 10 states. [2019-12-27 15:10:05,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:05,870 INFO L93 Difference]: Finished difference Result 186 states and 408 transitions. [2019-12-27 15:10:05,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:05,871 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:05,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:05,871 INFO L225 Difference]: With dead ends: 186 [2019-12-27 15:10:05,871 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:10:05,872 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:05,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:10:05,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 154. [2019-12-27 15:10:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:10:05,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 347 transitions. [2019-12-27 15:10:05,874 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 347 transitions. Word has length 14 [2019-12-27 15:10:05,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:05,875 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 347 transitions. [2019-12-27 15:10:05,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:05,875 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 347 transitions. [2019-12-27 15:10:05,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:05,875 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:05,875 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:06,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:06,079 INFO L410 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:06,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:06,079 INFO L82 PathProgramCache]: Analyzing trace with hash -591203565, now seen corresponding path program 171 times [2019-12-27 15:10:06,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:06,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665246594] [2019-12-27 15:10:06,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:06,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665246594] [2019-12-27 15:10:06,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600975208] [2019-12-27 15:10:06,171 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:06,216 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:10:06,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:06,217 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 15:10:06,217 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:06,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:06,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:06,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1753730252] [2019-12-27 15:10:06,327 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:06,328 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:06,331 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 50 transitions. [2019-12-27 15:10:06,331 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:06,334 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 15 times. [2019-12-27 15:10:06,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:06,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:06,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:06,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:06,335 INFO L87 Difference]: Start difference. First operand 154 states and 347 transitions. Second operand 10 states. [2019-12-27 15:10:06,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:06,543 INFO L93 Difference]: Finished difference Result 180 states and 397 transitions. [2019-12-27 15:10:06,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:06,544 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:06,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:06,544 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:10:06,545 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 15:10:06,545 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 15:10:06,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 150. [2019-12-27 15:10:06,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:10:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 343 transitions. [2019-12-27 15:10:06,548 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 343 transitions. Word has length 14 [2019-12-27 15:10:06,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:06,548 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 343 transitions. [2019-12-27 15:10:06,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:06,548 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 343 transitions. [2019-12-27 15:10:06,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:06,549 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:06,549 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:06,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:06,750 INFO L410 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:06,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:06,750 INFO L82 PathProgramCache]: Analyzing trace with hash -591347715, now seen corresponding path program 172 times [2019-12-27 15:10:06,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:06,751 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169997236] [2019-12-27 15:10:06,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:06,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169997236] [2019-12-27 15:10:06,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464821909] [2019-12-27 15:10:06,836 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:06,877 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:10:06,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:06,878 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:06,879 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:08,264 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:10:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:08,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:08,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:08,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [763857549] [2019-12-27 15:10:08,266 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:08,266 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:08,269 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 15:10:08,269 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:08,272 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:10:08,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:08,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:08,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:08,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:08,273 INFO L87 Difference]: Start difference. First operand 150 states and 343 transitions. Second operand 10 states. [2019-12-27 15:10:09,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:09,003 INFO L93 Difference]: Finished difference Result 185 states and 406 transitions. [2019-12-27 15:10:09,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:09,003 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:09,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:09,004 INFO L225 Difference]: With dead ends: 185 [2019-12-27 15:10:09,004 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 15:10:09,004 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=168, Invalid=383, Unknown=1, NotChecked=0, Total=552 [2019-12-27 15:10:09,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 15:10:09,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 151. [2019-12-27 15:10:09,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:10:09,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 346 transitions. [2019-12-27 15:10:09,008 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 346 transitions. Word has length 14 [2019-12-27 15:10:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:09,008 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 346 transitions. [2019-12-27 15:10:09,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:09,009 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 346 transitions. [2019-12-27 15:10:09,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:09,009 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:09,009 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:09,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:09,211 INFO L410 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:09,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:09,211 INFO L82 PathProgramCache]: Analyzing trace with hash -591352365, now seen corresponding path program 173 times [2019-12-27 15:10:09,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:09,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574824881] [2019-12-27 15:10:09,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:09,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574824881] [2019-12-27 15:10:09,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532496231] [2019-12-27 15:10:09,314 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:09,355 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:10:09,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:09,356 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:09,356 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:09,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:09,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:09,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1525724702] [2019-12-27 15:10:09,552 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:09,553 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:09,557 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 15:10:09,557 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:09,566 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:10:09,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:09,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:09,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:09,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:09,568 INFO L87 Difference]: Start difference. First operand 151 states and 346 transitions. Second operand 10 states. [2019-12-27 15:10:09,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:09,939 INFO L93 Difference]: Finished difference Result 195 states and 427 transitions. [2019-12-27 15:10:09,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:09,939 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:09,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:09,940 INFO L225 Difference]: With dead ends: 195 [2019-12-27 15:10:09,940 INFO L226 Difference]: Without dead ends: 192 [2019-12-27 15:10:09,941 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:09,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-27 15:10:09,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 152. [2019-12-27 15:10:09,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:10:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 349 transitions. [2019-12-27 15:10:09,945 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 349 transitions. Word has length 14 [2019-12-27 15:10:09,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:09,946 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 349 transitions. [2019-12-27 15:10:09,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:09,946 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 349 transitions. [2019-12-27 15:10:09,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:09,947 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:09,947 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:10,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:10,152 INFO L410 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:10,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:10,152 INFO L82 PathProgramCache]: Analyzing trace with hash -591352520, now seen corresponding path program 174 times [2019-12-27 15:10:10,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:10,153 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233006045] [2019-12-27 15:10:10,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:10,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233006045] [2019-12-27 15:10:10,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568724487] [2019-12-27 15:10:10,307 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:10,384 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:10:10,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:10,385 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:10,386 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:10,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:10,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:10,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:10,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1729523689] [2019-12-27 15:10:10,536 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:10,537 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:10,541 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 15:10:10,541 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:10,543 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:10:10,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:10,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:10,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:10,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:10,544 INFO L87 Difference]: Start difference. First operand 152 states and 349 transitions. Second operand 10 states. [2019-12-27 15:10:10,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:10,765 INFO L93 Difference]: Finished difference Result 183 states and 405 transitions. [2019-12-27 15:10:10,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:10,765 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:10,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:10,766 INFO L225 Difference]: With dead ends: 183 [2019-12-27 15:10:10,766 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 15:10:10,766 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 15:10:10,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 150. [2019-12-27 15:10:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:10:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 343 transitions. [2019-12-27 15:10:10,769 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 343 transitions. Word has length 14 [2019-12-27 15:10:10,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:10,770 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 343 transitions. [2019-12-27 15:10:10,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:10,770 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 343 transitions. [2019-12-27 15:10:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:10,770 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:10,770 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:10,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:10,971 INFO L410 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:10,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:10,972 INFO L82 PathProgramCache]: Analyzing trace with hash -595816365, now seen corresponding path program 175 times [2019-12-27 15:10:10,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:10,972 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113249080] [2019-12-27 15:10:10,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:11,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113249080] [2019-12-27 15:10:11,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909753421] [2019-12-27 15:10:11,053 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:11,100 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:11,100 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:11,660 WARN L192 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-27 15:10:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:18,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:18,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:18,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1670039937] [2019-12-27 15:10:18,486 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:18,486 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:18,495 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:18,495 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:18,496 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:18,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:18,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:18,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:18,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=221, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:10:18,497 INFO L87 Difference]: Start difference. First operand 150 states and 343 transitions. Second operand 10 states. [2019-12-27 15:10:31,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:31,416 INFO L93 Difference]: Finished difference Result 191 states and 418 transitions. [2019-12-27 15:10:31,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:10:31,417 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:31,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:31,417 INFO L225 Difference]: With dead ends: 191 [2019-12-27 15:10:31,418 INFO L226 Difference]: Without dead ends: 189 [2019-12-27 15:10:31,418 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=200, Invalid=442, Unknown=8, NotChecked=0, Total=650 [2019-12-27 15:10:31,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-27 15:10:31,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 152. [2019-12-27 15:10:31,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:10:31,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 349 transitions. [2019-12-27 15:10:31,421 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 349 transitions. Word has length 14 [2019-12-27 15:10:31,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:31,421 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 349 transitions. [2019-12-27 15:10:31,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:31,422 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 349 transitions. [2019-12-27 15:10:31,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:31,422 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:31,422 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:31,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:31,623 INFO L410 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:31,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:31,623 INFO L82 PathProgramCache]: Analyzing trace with hash -595821015, now seen corresponding path program 176 times [2019-12-27 15:10:31,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:31,624 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843269060] [2019-12-27 15:10:31,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:31,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843269060] [2019-12-27 15:10:31,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167321851] [2019-12-27 15:10:31,703 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:31,751 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:10:31,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:31,751 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:31,754 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:32,241 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_578 Int)) (and (<= (div (+ (* v_~i~0_578 (- 1)) 1) (- 3)) 1) (<= c_~i~0 (+ (* 2 v_~i~0_578) 1)) (<= c_~j~0 (+ v_~i~0_578 c_~i~0 1)))) is different from true [2019-12-27 15:10:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2019-12-27 15:10:32,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:32,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:32,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [644958882] [2019-12-27 15:10:32,266 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:32,267 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:32,269 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:32,269 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:32,271 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:32,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:32,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:32,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:32,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=193, Unknown=1, NotChecked=30, Total=306 [2019-12-27 15:10:32,271 INFO L87 Difference]: Start difference. First operand 152 states and 349 transitions. Second operand 10 states. [2019-12-27 15:10:34,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:34,199 INFO L93 Difference]: Finished difference Result 198 states and 433 transitions. [2019-12-27 15:10:34,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:34,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:34,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:34,200 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:10:34,200 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:10:34,200 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=164, Invalid=343, Unknown=3, NotChecked=42, Total=552 [2019-12-27 15:10:34,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:10:34,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 153. [2019-12-27 15:10:34,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:10:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 352 transitions. [2019-12-27 15:10:34,204 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 352 transitions. Word has length 14 [2019-12-27 15:10:34,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:34,204 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 352 transitions. [2019-12-27 15:10:34,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:34,204 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 352 transitions. [2019-12-27 15:10:34,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:34,205 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:34,205 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:34,405 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:34,406 INFO L410 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:34,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:34,406 INFO L82 PathProgramCache]: Analyzing trace with hash -595821170, now seen corresponding path program 177 times [2019-12-27 15:10:34,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:34,407 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757756412] [2019-12-27 15:10:34,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:34,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:34,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757756412] [2019-12-27 15:10:34,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697884307] [2019-12-27 15:10:34,490 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:34,534 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:10:34,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:34,535 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:34,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:37,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:37,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:37,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2824808] [2019-12-27 15:10:37,500 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:37,501 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:37,503 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:37,503 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:37,505 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:37,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:37,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:37,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:37,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=222, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:10:37,505 INFO L87 Difference]: Start difference. First operand 153 states and 352 transitions. Second operand 10 states. [2019-12-27 15:10:40,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:40,575 INFO L93 Difference]: Finished difference Result 189 states and 418 transitions. [2019-12-27 15:10:40,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:40,576 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:40,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:40,576 INFO L225 Difference]: With dead ends: 189 [2019-12-27 15:10:40,577 INFO L226 Difference]: Without dead ends: 188 [2019-12-27 15:10:40,577 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=168, Invalid=378, Unknown=6, NotChecked=0, Total=552 [2019-12-27 15:10:40,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-27 15:10:40,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 151. [2019-12-27 15:10:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:10:40,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 346 transitions. [2019-12-27 15:10:40,580 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 346 transitions. Word has length 14 [2019-12-27 15:10:40,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:40,581 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 346 transitions. [2019-12-27 15:10:40,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:40,581 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 346 transitions. [2019-12-27 15:10:40,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:40,581 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:40,581 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:40,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:40,784 INFO L410 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:40,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:40,784 INFO L82 PathProgramCache]: Analyzing trace with hash -595965165, now seen corresponding path program 178 times [2019-12-27 15:10:40,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:40,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21701629] [2019-12-27 15:10:40,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:40,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21701629] [2019-12-27 15:10:40,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765283087] [2019-12-27 15:10:40,872 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:40,924 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:10:40,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:40,925 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:40,926 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:41,839 WARN L192 SmtUtils]: Spent 810.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:10:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:42,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:42,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:42,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1792606965] [2019-12-27 15:10:42,059 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:42,060 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:42,062 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:42,062 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:42,064 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:42,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:42,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:42,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:42,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:42,064 INFO L87 Difference]: Start difference. First operand 151 states and 346 transitions. Second operand 10 states. [2019-12-27 15:10:44,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:44,063 INFO L93 Difference]: Finished difference Result 205 states and 448 transitions. [2019-12-27 15:10:44,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:44,063 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:44,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:44,064 INFO L225 Difference]: With dead ends: 205 [2019-12-27 15:10:44,064 INFO L226 Difference]: Without dead ends: 201 [2019-12-27 15:10:44,065 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=170, Invalid=380, Unknown=2, NotChecked=0, Total=552 [2019-12-27 15:10:44,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-27 15:10:44,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 153. [2019-12-27 15:10:44,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:10:44,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 352 transitions. [2019-12-27 15:10:44,069 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 352 transitions. Word has length 14 [2019-12-27 15:10:44,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:44,069 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 352 transitions. [2019-12-27 15:10:44,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:44,070 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 352 transitions. [2019-12-27 15:10:44,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:44,070 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:44,070 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:44,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:44,273 INFO L410 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:44,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:44,274 INFO L82 PathProgramCache]: Analyzing trace with hash -595965320, now seen corresponding path program 179 times [2019-12-27 15:10:44,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:44,274 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378197669] [2019-12-27 15:10:44,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:44,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378197669] [2019-12-27 15:10:44,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767415160] [2019-12-27 15:10:44,376 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:44,430 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:10:44,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:44,431 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:44,431 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:45,399 WARN L192 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:10:45,821 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_592 Int)) (and (<= c_~i~0 (+ (* 3 v_~i~0_592) 1)) (<= c_~j~0 (+ c_~i~0 (* 2 v_~i~0_592) 1)) (<= (div (+ (* v_~i~0_592 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-27 15:10:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:45,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:45,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:45,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [925464593] [2019-12-27 15:10:45,822 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:45,823 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:45,832 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:45,832 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:45,833 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:45,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:45,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:45,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:45,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=195, Unknown=1, NotChecked=30, Total=306 [2019-12-27 15:10:45,834 INFO L87 Difference]: Start difference. First operand 153 states and 352 transitions. Second operand 10 states. [2019-12-27 15:10:46,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:46,830 INFO L93 Difference]: Finished difference Result 198 states and 434 transitions. [2019-12-27 15:10:46,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:10:46,830 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:46,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:46,831 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:10:46,831 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 15:10:46,832 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=178, Invalid=376, Unknown=2, NotChecked=44, Total=600 [2019-12-27 15:10:46,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 15:10:46,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 152. [2019-12-27 15:10:46,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:10:46,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 349 transitions. [2019-12-27 15:10:46,836 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 349 transitions. Word has length 14 [2019-12-27 15:10:46,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:46,836 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 349 transitions. [2019-12-27 15:10:46,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:46,836 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 349 transitions. [2019-12-27 15:10:46,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:46,837 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:46,837 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:47,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:47,040 INFO L410 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:47,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:47,041 INFO L82 PathProgramCache]: Analyzing trace with hash -595969970, now seen corresponding path program 180 times [2019-12-27 15:10:47,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:47,041 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41188429] [2019-12-27 15:10:47,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:47,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41188429] [2019-12-27 15:10:47,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693973372] [2019-12-27 15:10:47,127 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:47,177 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:10:47,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:47,177 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:47,178 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:47,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:47,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:47,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1739540611] [2019-12-27 15:10:47,297 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:47,298 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:47,300 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:47,300 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:47,302 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:47,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:47,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:47,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:47,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:47,302 INFO L87 Difference]: Start difference. First operand 152 states and 349 transitions. Second operand 10 states. [2019-12-27 15:10:48,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:48,694 INFO L93 Difference]: Finished difference Result 202 states and 446 transitions. [2019-12-27 15:10:48,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:48,694 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:48,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:48,695 INFO L225 Difference]: With dead ends: 202 [2019-12-27 15:10:48,695 INFO L226 Difference]: Without dead ends: 201 [2019-12-27 15:10:48,695 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=169, Invalid=381, Unknown=2, NotChecked=0, Total=552 [2019-12-27 15:10:48,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-27 15:10:48,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 153. [2019-12-27 15:10:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:10:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 353 transitions. [2019-12-27 15:10:48,699 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 353 transitions. Word has length 14 [2019-12-27 15:10:48,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:48,699 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 353 transitions. [2019-12-27 15:10:48,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 353 transitions. [2019-12-27 15:10:48,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:48,699 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:48,700 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:48,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:48,900 INFO L410 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:48,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:48,901 INFO L82 PathProgramCache]: Analyzing trace with hash -595970125, now seen corresponding path program 181 times [2019-12-27 15:10:48,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:48,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910956768] [2019-12-27 15:10:48,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:48,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910956768] [2019-12-27 15:10:48,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500123152] [2019-12-27 15:10:48,982 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:49,028 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:49,029 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:49,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:49,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:49,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [825316459] [2019-12-27 15:10:49,167 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:49,168 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:49,170 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:49,170 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:49,172 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:49,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:49,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:49,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:49,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:49,172 INFO L87 Difference]: Start difference. First operand 153 states and 353 transitions. Second operand 10 states. [2019-12-27 15:10:49,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:49,357 INFO L93 Difference]: Finished difference Result 183 states and 404 transitions. [2019-12-27 15:10:49,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:49,358 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:49,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:49,358 INFO L225 Difference]: With dead ends: 183 [2019-12-27 15:10:49,358 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 15:10:49,359 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:49,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 15:10:49,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 150. [2019-12-27 15:10:49,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:10:49,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 343 transitions. [2019-12-27 15:10:49,362 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 343 transitions. Word has length 14 [2019-12-27 15:10:49,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:49,362 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 343 transitions. [2019-12-27 15:10:49,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:49,363 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 343 transitions. [2019-12-27 15:10:49,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:49,363 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:49,363 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:49,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:49,563 INFO L410 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:49,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:49,564 INFO L82 PathProgramCache]: Analyzing trace with hash -734344515, now seen corresponding path program 182 times [2019-12-27 15:10:49,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:49,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034342914] [2019-12-27 15:10:49,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:49,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034342914] [2019-12-27 15:10:49,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218831934] [2019-12-27 15:10:49,649 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:49,692 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:10:49,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:49,693 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:49,693 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:53,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:53,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:53,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1812783055] [2019-12-27 15:10:53,945 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:53,946 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:53,948 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:10:53,948 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:53,949 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:10:53,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:53,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:53,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:53,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:53,950 INFO L87 Difference]: Start difference. First operand 150 states and 343 transitions. Second operand 10 states. [2019-12-27 15:11:00,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:00,307 INFO L93 Difference]: Finished difference Result 193 states and 422 transitions. [2019-12-27 15:11:00,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:00,308 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:00,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:00,308 INFO L225 Difference]: With dead ends: 193 [2019-12-27 15:11:00,308 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 15:11:00,309 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=185, Invalid=412, Unknown=3, NotChecked=0, Total=600 [2019-12-27 15:11:00,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 15:11:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 153. [2019-12-27 15:11:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:11:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 352 transitions. [2019-12-27 15:11:00,312 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 352 transitions. Word has length 14 [2019-12-27 15:11:00,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:00,312 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 352 transitions. [2019-12-27 15:11:00,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:00,313 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 352 transitions. [2019-12-27 15:11:00,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:00,313 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:00,313 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:00,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:00,514 INFO L410 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:00,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:00,514 INFO L82 PathProgramCache]: Analyzing trace with hash -734349165, now seen corresponding path program 183 times [2019-12-27 15:11:00,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:00,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557897891] [2019-12-27 15:11:00,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:00,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557897891] [2019-12-27 15:11:00,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053332729] [2019-12-27 15:11:00,596 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:00,645 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:11:00,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:00,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:00,647 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:05,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:05,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:05,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [657444409] [2019-12-27 15:11:05,041 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:05,042 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:05,044 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:05,044 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:05,045 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:05,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:05,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:05,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:05,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:05,045 INFO L87 Difference]: Start difference. First operand 153 states and 352 transitions. Second operand 10 states. [2019-12-27 15:11:12,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:12,452 INFO L93 Difference]: Finished difference Result 191 states and 416 transitions. [2019-12-27 15:11:12,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:12,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:12,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:12,453 INFO L225 Difference]: With dead ends: 191 [2019-12-27 15:11:12,453 INFO L226 Difference]: Without dead ends: 188 [2019-12-27 15:11:12,454 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=201, Invalid=444, Unknown=5, NotChecked=0, Total=650 [2019-12-27 15:11:12,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-27 15:11:12,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 154. [2019-12-27 15:11:12,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:11:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 355 transitions. [2019-12-27 15:11:12,457 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 355 transitions. Word has length 14 [2019-12-27 15:11:12,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:12,457 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 355 transitions. [2019-12-27 15:11:12,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 355 transitions. [2019-12-27 15:11:12,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:12,458 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:12,458 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:12,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:12,659 INFO L410 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:12,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:12,659 INFO L82 PathProgramCache]: Analyzing trace with hash -734349320, now seen corresponding path program 184 times [2019-12-27 15:11:12,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:12,660 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886229290] [2019-12-27 15:11:12,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:12,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886229290] [2019-12-27 15:11:12,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338070085] [2019-12-27 15:11:12,739 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:12,785 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:12,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:12,786 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:12,786 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:17,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:17,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:17,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [353766853] [2019-12-27 15:11:17,218 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:17,218 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:17,220 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:17,220 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:17,221 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:17,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:17,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:17,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:17,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:17,222 INFO L87 Difference]: Start difference. First operand 154 states and 355 transitions. Second operand 10 states. [2019-12-27 15:11:17,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:17,859 INFO L93 Difference]: Finished difference Result 197 states and 433 transitions. [2019-12-27 15:11:17,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:17,859 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:17,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:17,860 INFO L225 Difference]: With dead ends: 197 [2019-12-27 15:11:17,860 INFO L226 Difference]: Without dead ends: 196 [2019-12-27 15:11:17,860 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:17,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-27 15:11:17,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 152. [2019-12-27 15:11:17,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:11:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 349 transitions. [2019-12-27 15:11:17,864 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 349 transitions. Word has length 14 [2019-12-27 15:11:17,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:17,864 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 349 transitions. [2019-12-27 15:11:17,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:17,864 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 349 transitions. [2019-12-27 15:11:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:17,865 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:17,865 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:18,065 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:18,065 INFO L410 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:18,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:18,066 INFO L82 PathProgramCache]: Analyzing trace with hash -734493315, now seen corresponding path program 185 times [2019-12-27 15:11:18,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:18,066 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623623725] [2019-12-27 15:11:18,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:18,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623623725] [2019-12-27 15:11:18,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896652907] [2019-12-27 15:11:18,160 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:18,203 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:11:18,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:18,205 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:18,205 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:18,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:18,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:18,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1659413412] [2019-12-27 15:11:18,364 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:18,365 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:18,367 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:18,367 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:18,368 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:18,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:18,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:18,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:18,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:18,368 INFO L87 Difference]: Start difference. First operand 152 states and 349 transitions. Second operand 10 states. [2019-12-27 15:11:18,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:18,686 INFO L93 Difference]: Finished difference Result 195 states and 425 transitions. [2019-12-27 15:11:18,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:18,686 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:18,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:18,687 INFO L225 Difference]: With dead ends: 195 [2019-12-27 15:11:18,687 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 15:11:18,687 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:18,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 15:11:18,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 154. [2019-12-27 15:11:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:11:18,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 355 transitions. [2019-12-27 15:11:18,690 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 355 transitions. Word has length 14 [2019-12-27 15:11:18,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:18,691 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 355 transitions. [2019-12-27 15:11:18,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:18,691 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 355 transitions. [2019-12-27 15:11:18,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:18,691 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:18,691 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:18,891 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:18,892 INFO L410 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:18,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:18,892 INFO L82 PathProgramCache]: Analyzing trace with hash -734493470, now seen corresponding path program 186 times [2019-12-27 15:11:18,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:18,893 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241945955] [2019-12-27 15:11:18,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:18,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241945955] [2019-12-27 15:11:18,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23796996] [2019-12-27 15:11:18,974 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:19,017 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:11:19,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:19,018 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:19,018 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:19,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:19,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:19,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [146153673] [2019-12-27 15:11:19,210 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:19,211 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:19,213 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:19,213 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:19,214 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:19,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:19,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:19,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:19,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:19,214 INFO L87 Difference]: Start difference. First operand 154 states and 355 transitions. Second operand 10 states. [2019-12-27 15:11:19,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:19,516 INFO L93 Difference]: Finished difference Result 194 states and 428 transitions. [2019-12-27 15:11:19,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:19,517 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:19,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:19,518 INFO L225 Difference]: With dead ends: 194 [2019-12-27 15:11:19,518 INFO L226 Difference]: Without dead ends: 193 [2019-12-27 15:11:19,518 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:19,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-27 15:11:19,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 153. [2019-12-27 15:11:19,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:11:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 352 transitions. [2019-12-27 15:11:19,521 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 352 transitions. Word has length 14 [2019-12-27 15:11:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:19,522 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 352 transitions. [2019-12-27 15:11:19,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 352 transitions. [2019-12-27 15:11:19,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:19,522 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:19,522 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:19,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:19,723 INFO L410 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:19,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:19,723 INFO L82 PathProgramCache]: Analyzing trace with hash -734498120, now seen corresponding path program 187 times [2019-12-27 15:11:19,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:19,724 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423070589] [2019-12-27 15:11:19,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:19,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423070589] [2019-12-27 15:11:19,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719149189] [2019-12-27 15:11:19,806 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:19,850 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:19,850 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:20,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:20,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:20,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1123959444] [2019-12-27 15:11:20,046 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:20,047 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:20,049 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:20,049 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:20,050 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:20,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:20,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:20,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:20,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:20,051 INFO L87 Difference]: Start difference. First operand 153 states and 352 transitions. Second operand 10 states. [2019-12-27 15:11:20,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:20,399 INFO L93 Difference]: Finished difference Result 199 states and 436 transitions. [2019-12-27 15:11:20,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:20,399 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:20,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:20,400 INFO L225 Difference]: With dead ends: 199 [2019-12-27 15:11:20,400 INFO L226 Difference]: Without dead ends: 198 [2019-12-27 15:11:20,401 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:20,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-27 15:11:20,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 154. [2019-12-27 15:11:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:11:20,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 356 transitions. [2019-12-27 15:11:20,404 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 356 transitions. Word has length 14 [2019-12-27 15:11:20,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:20,404 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 356 transitions. [2019-12-27 15:11:20,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:20,404 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 356 transitions. [2019-12-27 15:11:20,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:20,405 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:20,405 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:20,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:20,606 INFO L410 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:20,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:20,606 INFO L82 PathProgramCache]: Analyzing trace with hash -734498275, now seen corresponding path program 188 times [2019-12-27 15:11:20,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:20,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550058300] [2019-12-27 15:11:20,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:20,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550058300] [2019-12-27 15:11:20,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727460875] [2019-12-27 15:11:20,696 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:20,736 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:20,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:20,736 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:20,737 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:20,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:20,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:20,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1087986689] [2019-12-27 15:11:20,935 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:20,935 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:20,937 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:20,937 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:20,938 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:20,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:20,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:20,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:20,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:20,939 INFO L87 Difference]: Start difference. First operand 154 states and 356 transitions. Second operand 10 states. [2019-12-27 15:11:21,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:21,227 INFO L93 Difference]: Finished difference Result 188 states and 413 transitions. [2019-12-27 15:11:21,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:21,227 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:21,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:21,228 INFO L225 Difference]: With dead ends: 188 [2019-12-27 15:11:21,228 INFO L226 Difference]: Without dead ends: 187 [2019-12-27 15:11:21,228 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:21,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-27 15:11:21,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 151. [2019-12-27 15:11:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:11:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 346 transitions. [2019-12-27 15:11:21,231 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 346 transitions. Word has length 14 [2019-12-27 15:11:21,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:21,232 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 346 transitions. [2019-12-27 15:11:21,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:21,232 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 346 transitions. [2019-12-27 15:11:21,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:21,232 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:21,232 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:21,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:21,433 INFO L410 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:21,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:21,433 INFO L82 PathProgramCache]: Analyzing trace with hash -738961965, now seen corresponding path program 189 times [2019-12-27 15:11:21,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:21,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709577013] [2019-12-27 15:11:21,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:21,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709577013] [2019-12-27 15:11:21,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008707653] [2019-12-27 15:11:21,517 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:21,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:11:21,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:21,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:21,565 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:21,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:21,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:21,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [131158082] [2019-12-27 15:11:21,706 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:21,707 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:21,710 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:21,710 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:21,711 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:21,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:21,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:21,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:21,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:21,711 INFO L87 Difference]: Start difference. First operand 151 states and 346 transitions. Second operand 10 states. [2019-12-27 15:11:21,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:21,943 INFO L93 Difference]: Finished difference Result 198 states and 431 transitions. [2019-12-27 15:11:21,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:21,944 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:21,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:21,945 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:11:21,945 INFO L226 Difference]: Without dead ends: 193 [2019-12-27 15:11:21,945 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:21,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-27 15:11:21,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 154. [2019-12-27 15:11:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:11:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 355 transitions. [2019-12-27 15:11:21,949 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 355 transitions. Word has length 14 [2019-12-27 15:11:21,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:21,949 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 355 transitions. [2019-12-27 15:11:21,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:21,949 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 355 transitions. [2019-12-27 15:11:21,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:21,949 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:21,950 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:22,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:22,150 INFO L410 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:22,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:22,151 INFO L82 PathProgramCache]: Analyzing trace with hash -738962120, now seen corresponding path program 190 times [2019-12-27 15:11:22,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:22,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980648124] [2019-12-27 15:11:22,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:22,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980648124] [2019-12-27 15:11:22,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863648687] [2019-12-27 15:11:22,235 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:22,277 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:22,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:22,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:22,278 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:30,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:30,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:30,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [908593996] [2019-12-27 15:11:30,548 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:30,549 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:30,552 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:30,552 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:30,553 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:30,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:30,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:30,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:30,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:30,554 INFO L87 Difference]: Start difference. First operand 154 states and 355 transitions. Second operand 10 states. [2019-12-27 15:11:37,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:37,249 INFO L93 Difference]: Finished difference Result 204 states and 445 transitions. [2019-12-27 15:11:37,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:37,249 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:37,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:37,250 INFO L225 Difference]: With dead ends: 204 [2019-12-27 15:11:37,250 INFO L226 Difference]: Without dead ends: 203 [2019-12-27 15:11:37,250 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=201, Invalid=446, Unknown=3, NotChecked=0, Total=650 [2019-12-27 15:11:37,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-27 15:11:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 153. [2019-12-27 15:11:37,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:11:37,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 352 transitions. [2019-12-27 15:11:37,254 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 352 transitions. Word has length 14 [2019-12-27 15:11:37,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:37,254 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 352 transitions. [2019-12-27 15:11:37,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:37,254 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 352 transitions. [2019-12-27 15:11:37,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:37,254 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:37,254 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:37,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:37,455 INFO L410 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:37,455 INFO L82 PathProgramCache]: Analyzing trace with hash -738966770, now seen corresponding path program 191 times [2019-12-27 15:11:37,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:37,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64932725] [2019-12-27 15:11:37,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:37,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64932725] [2019-12-27 15:11:37,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946959147] [2019-12-27 15:11:37,542 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:37,582 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:11:37,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:37,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:37,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:37,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:37,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:37,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1857027526] [2019-12-27 15:11:37,748 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:37,749 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:37,751 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:37,751 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:37,752 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:37,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:37,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:37,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:37,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:37,752 INFO L87 Difference]: Start difference. First operand 153 states and 352 transitions. Second operand 10 states. [2019-12-27 15:11:38,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:38,163 INFO L93 Difference]: Finished difference Result 199 states and 433 transitions. [2019-12-27 15:11:38,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:38,163 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:38,164 INFO L225 Difference]: With dead ends: 199 [2019-12-27 15:11:38,164 INFO L226 Difference]: Without dead ends: 198 [2019-12-27 15:11:38,164 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2019-12-27 15:11:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-27 15:11:38,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 154. [2019-12-27 15:11:38,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:11:38,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 356 transitions. [2019-12-27 15:11:38,168 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 356 transitions. Word has length 14 [2019-12-27 15:11:38,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:38,168 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 356 transitions. [2019-12-27 15:11:38,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:38,168 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 356 transitions. [2019-12-27 15:11:38,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:38,168 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:38,168 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:38,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:38,369 INFO L410 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:38,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:38,370 INFO L82 PathProgramCache]: Analyzing trace with hash -738966925, now seen corresponding path program 192 times [2019-12-27 15:11:38,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:38,370 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205307433] [2019-12-27 15:11:38,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:38,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205307433] [2019-12-27 15:11:38,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296183407] [2019-12-27 15:11:38,460 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:38,506 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:11:38,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:38,507 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:38,507 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:38,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:38,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:38,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [304931703] [2019-12-27 15:11:38,678 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:38,678 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:38,681 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:38,681 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:38,682 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:38,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:38,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:38,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:38,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:38,682 INFO L87 Difference]: Start difference. First operand 154 states and 356 transitions. Second operand 10 states. [2019-12-27 15:11:39,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:39,071 INFO L93 Difference]: Finished difference Result 194 states and 422 transitions. [2019-12-27 15:11:39,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:39,071 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:39,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:39,071 INFO L225 Difference]: With dead ends: 194 [2019-12-27 15:11:39,071 INFO L226 Difference]: Without dead ends: 193 [2019-12-27 15:11:39,072 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2019-12-27 15:11:39,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-27 15:11:39,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 152. [2019-12-27 15:11:39,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:11:39,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 349 transitions. [2019-12-27 15:11:39,074 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 349 transitions. Word has length 14 [2019-12-27 15:11:39,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:39,074 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 349 transitions. [2019-12-27 15:11:39,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 349 transitions. [2019-12-27 15:11:39,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:39,074 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:39,074 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:39,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:39,275 INFO L410 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:39,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:39,276 INFO L82 PathProgramCache]: Analyzing trace with hash -739110920, now seen corresponding path program 193 times [2019-12-27 15:11:39,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:39,276 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468029890] [2019-12-27 15:11:39,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:39,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468029890] [2019-12-27 15:11:39,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232156774] [2019-12-27 15:11:39,358 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:39,401 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:39,402 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:39,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:39,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:39,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [660508244] [2019-12-27 15:11:39,520 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:39,521 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:39,523 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:39,523 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:39,524 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:39,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:39,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:39,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:39,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:39,524 INFO L87 Difference]: Start difference. First operand 152 states and 349 transitions. Second operand 10 states. [2019-12-27 15:11:39,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:39,789 INFO L93 Difference]: Finished difference Result 198 states and 435 transitions. [2019-12-27 15:11:39,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:39,790 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:39,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:39,790 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:11:39,790 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 15:11:39,791 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 15:11:39,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 154. [2019-12-27 15:11:39,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:11:39,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 357 transitions. [2019-12-27 15:11:39,794 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 357 transitions. Word has length 14 [2019-12-27 15:11:39,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:39,795 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 357 transitions. [2019-12-27 15:11:39,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:39,795 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 357 transitions. [2019-12-27 15:11:39,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:39,795 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:39,795 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:39,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:39,996 INFO L410 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:39,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:39,996 INFO L82 PathProgramCache]: Analyzing trace with hash -739111075, now seen corresponding path program 194 times [2019-12-27 15:11:39,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:39,997 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422296485] [2019-12-27 15:11:39,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:40,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422296485] [2019-12-27 15:11:40,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599799836] [2019-12-27 15:11:40,077 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:40,120 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:40,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:40,121 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:40,121 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:40,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:40,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:40,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1265080339] [2019-12-27 15:11:40,267 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:40,268 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:40,270 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:40,270 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:40,271 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:40,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:40,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:40,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:40,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:40,272 INFO L87 Difference]: Start difference. First operand 154 states and 357 transitions. Second operand 10 states. [2019-12-27 15:11:40,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:40,659 INFO L93 Difference]: Finished difference Result 196 states and 425 transitions. [2019-12-27 15:11:40,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 15:11:40,660 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:40,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:40,661 INFO L225 Difference]: With dead ends: 196 [2019-12-27 15:11:40,661 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:11:40,661 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2019-12-27 15:11:40,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:11:40,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 153. [2019-12-27 15:11:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:11:40,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 353 transitions. [2019-12-27 15:11:40,664 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 353 transitions. Word has length 14 [2019-12-27 15:11:40,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:40,665 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 353 transitions. [2019-12-27 15:11:40,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:40,665 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 353 transitions. [2019-12-27 15:11:40,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:40,665 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:40,665 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:40,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:40,866 INFO L410 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:40,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:40,866 INFO L82 PathProgramCache]: Analyzing trace with hash -739115725, now seen corresponding path program 195 times [2019-12-27 15:11:40,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:40,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716333334] [2019-12-27 15:11:40,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:40,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716333334] [2019-12-27 15:11:40,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347245743] [2019-12-27 15:11:40,957 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:41,002 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:11:41,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:41,003 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:41,004 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:41,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:41,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:41,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1544012124] [2019-12-27 15:11:41,142 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:41,142 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:41,144 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:41,144 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:41,145 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:41,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:41,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:41,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:41,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:41,146 INFO L87 Difference]: Start difference. First operand 153 states and 353 transitions. Second operand 10 states. [2019-12-27 15:11:41,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:41,401 INFO L93 Difference]: Finished difference Result 192 states and 421 transitions. [2019-12-27 15:11:41,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:41,401 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:41,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:41,402 INFO L225 Difference]: With dead ends: 192 [2019-12-27 15:11:41,402 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 15:11:41,402 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:41,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 15:11:41,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 154. [2019-12-27 15:11:41,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:11:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 357 transitions. [2019-12-27 15:11:41,406 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 357 transitions. Word has length 14 [2019-12-27 15:11:41,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:41,406 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 357 transitions. [2019-12-27 15:11:41,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:41,406 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 357 transitions. [2019-12-27 15:11:41,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:41,406 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:41,406 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:41,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:41,607 INFO L410 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:41,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:41,608 INFO L82 PathProgramCache]: Analyzing trace with hash -739115880, now seen corresponding path program 196 times [2019-12-27 15:11:41,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:41,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742606417] [2019-12-27 15:11:41,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:41,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742606417] [2019-12-27 15:11:41,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365103116] [2019-12-27 15:11:41,688 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:41,733 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:41,733 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:41,734 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:41,734 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:41,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:41,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:41,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1150449479] [2019-12-27 15:11:41,871 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:41,872 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:41,875 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:41,875 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:41,876 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:41,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:41,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:41,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:41,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:41,877 INFO L87 Difference]: Start difference. First operand 154 states and 357 transitions. Second operand 10 states. [2019-12-27 15:11:42,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:42,068 INFO L93 Difference]: Finished difference Result 171 states and 376 transitions. [2019-12-27 15:11:42,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:42,068 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:42,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:42,069 INFO L225 Difference]: With dead ends: 171 [2019-12-27 15:11:42,069 INFO L226 Difference]: Without dead ends: 161 [2019-12-27 15:11:42,069 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:42,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-27 15:11:42,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 150. [2019-12-27 15:11:42,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:11:42,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 339 transitions. [2019-12-27 15:11:42,072 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 339 transitions. Word has length 14 [2019-12-27 15:11:42,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:42,073 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 339 transitions. [2019-12-27 15:11:42,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:42,073 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 339 transitions. [2019-12-27 15:11:42,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:42,073 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:42,073 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:42,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:42,274 INFO L410 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:42,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:42,274 INFO L82 PathProgramCache]: Analyzing trace with hash -733749869, now seen corresponding path program 197 times [2019-12-27 15:11:42,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:42,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612567160] [2019-12-27 15:11:42,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:42,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612567160] [2019-12-27 15:11:42,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577457773] [2019-12-27 15:11:42,359 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:42,401 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:11:42,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:42,402 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:42,403 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:42,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:42,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:42,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1658739646] [2019-12-27 15:11:42,514 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:42,515 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:42,516 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:42,517 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:42,517 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:42,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:42,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:42,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:42,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:42,518 INFO L87 Difference]: Start difference. First operand 150 states and 339 transitions. Second operand 10 states. [2019-12-27 15:11:42,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:42,753 INFO L93 Difference]: Finished difference Result 193 states and 424 transitions. [2019-12-27 15:11:42,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:42,753 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:42,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:42,754 INFO L225 Difference]: With dead ends: 193 [2019-12-27 15:11:42,754 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 15:11:42,754 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:42,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 15:11:42,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 148. [2019-12-27 15:11:42,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 15:11:42,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 336 transitions. [2019-12-27 15:11:42,758 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 336 transitions. Word has length 14 [2019-12-27 15:11:42,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:42,758 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 336 transitions. [2019-12-27 15:11:42,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:42,758 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 336 transitions. [2019-12-27 15:11:42,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:42,759 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:42,759 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:42,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:42,959 INFO L410 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:42,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:42,960 INFO L82 PathProgramCache]: Analyzing trace with hash -733754519, now seen corresponding path program 198 times [2019-12-27 15:11:42,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:42,961 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213486835] [2019-12-27 15:11:42,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:43,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213486835] [2019-12-27 15:11:43,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439079150] [2019-12-27 15:11:43,042 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:43,088 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 15:11:43,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:43,089 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:43,090 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:43,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:43,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:43,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1760762418] [2019-12-27 15:11:43,362 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:43,363 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:43,366 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:43,366 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:43,367 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:43,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:43,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:43,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:43,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:43,368 INFO L87 Difference]: Start difference. First operand 148 states and 336 transitions. Second operand 10 states. [2019-12-27 15:11:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:43,692 INFO L93 Difference]: Finished difference Result 187 states and 408 transitions. [2019-12-27 15:11:43,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:43,693 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:43,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:43,693 INFO L225 Difference]: With dead ends: 187 [2019-12-27 15:11:43,694 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:11:43,695 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2019-12-27 15:11:43,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:11:43,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 149. [2019-12-27 15:11:43,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:11:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 339 transitions. [2019-12-27 15:11:43,699 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 339 transitions. Word has length 14 [2019-12-27 15:11:43,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:43,699 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 339 transitions. [2019-12-27 15:11:43,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:43,699 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 339 transitions. [2019-12-27 15:11:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:43,699 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:43,700 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:43,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:43,903 INFO L410 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:43,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:43,904 INFO L82 PathProgramCache]: Analyzing trace with hash -733754674, now seen corresponding path program 199 times [2019-12-27 15:11:43,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:43,904 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400748867] [2019-12-27 15:11:43,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:43,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400748867] [2019-12-27 15:11:43,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114782498] [2019-12-27 15:11:43,988 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:44,033 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:44,034 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:44,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:44,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:44,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [359098090] [2019-12-27 15:11:44,142 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:44,143 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:44,145 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:44,146 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:44,146 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:44,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:44,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:44,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:44,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:44,153 INFO L87 Difference]: Start difference. First operand 149 states and 339 transitions. Second operand 10 states. [2019-12-27 15:11:44,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:44,376 INFO L93 Difference]: Finished difference Result 203 states and 449 transitions. [2019-12-27 15:11:44,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:44,376 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:44,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:44,377 INFO L225 Difference]: With dead ends: 203 [2019-12-27 15:11:44,377 INFO L226 Difference]: Without dead ends: 202 [2019-12-27 15:11:44,378 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:44,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-12-27 15:11:44,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 147. [2019-12-27 15:11:44,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 15:11:44,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 333 transitions. [2019-12-27 15:11:44,380 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 333 transitions. Word has length 14 [2019-12-27 15:11:44,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:44,380 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 333 transitions. [2019-12-27 15:11:44,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:44,381 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 333 transitions. [2019-12-27 15:11:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:44,381 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:44,381 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:44,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:44,582 INFO L410 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:44,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:44,582 INFO L82 PathProgramCache]: Analyzing trace with hash -733898669, now seen corresponding path program 200 times [2019-12-27 15:11:44,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:44,583 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988826305] [2019-12-27 15:11:44,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:44,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988826305] [2019-12-27 15:11:44,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713023707] [2019-12-27 15:11:44,667 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:44,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:44,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:44,712 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:44,712 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:44,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:44,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:44,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1746721161] [2019-12-27 15:11:44,861 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:44,861 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:44,863 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:44,863 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:44,864 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:44,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:44,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:44,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:44,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:44,865 INFO L87 Difference]: Start difference. First operand 147 states and 333 transitions. Second operand 10 states. [2019-12-27 15:11:46,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:46,410 INFO L93 Difference]: Finished difference Result 186 states and 406 transitions. [2019-12-27 15:11:46,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:46,411 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:46,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:46,411 INFO L225 Difference]: With dead ends: 186 [2019-12-27 15:11:46,411 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 15:11:46,412 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=182, Invalid=415, Unknown=3, NotChecked=0, Total=600 [2019-12-27 15:11:46,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 15:11:46,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 149. [2019-12-27 15:11:46,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:11:46,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 339 transitions. [2019-12-27 15:11:46,415 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 339 transitions. Word has length 14 [2019-12-27 15:11:46,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:46,415 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 339 transitions. [2019-12-27 15:11:46,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:46,415 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 339 transitions. [2019-12-27 15:11:46,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:46,415 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:46,415 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:46,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:46,616 INFO L410 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:46,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:46,616 INFO L82 PathProgramCache]: Analyzing trace with hash -733898824, now seen corresponding path program 201 times [2019-12-27 15:11:46,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:46,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079629292] [2019-12-27 15:11:46,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:46,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079629292] [2019-12-27 15:11:46,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829048430] [2019-12-27 15:11:46,704 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:46,749 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:11:46,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:46,750 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:46,751 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:48,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:48,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:48,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [305020296] [2019-12-27 15:11:48,394 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:48,394 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:48,397 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:48,397 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:48,398 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:48,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:48,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:48,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:48,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=219, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:11:48,398 INFO L87 Difference]: Start difference. First operand 149 states and 339 transitions. Second operand 10 states. [2019-12-27 15:11:50,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:50,249 INFO L93 Difference]: Finished difference Result 194 states and 428 transitions. [2019-12-27 15:11:50,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:50,249 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:50,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:50,250 INFO L225 Difference]: With dead ends: 194 [2019-12-27 15:11:50,250 INFO L226 Difference]: Without dead ends: 193 [2019-12-27 15:11:50,250 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=182, Invalid=414, Unknown=4, NotChecked=0, Total=600 [2019-12-27 15:11:50,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-27 15:11:50,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 148. [2019-12-27 15:11:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 15:11:50,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 336 transitions. [2019-12-27 15:11:50,253 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 336 transitions. Word has length 14 [2019-12-27 15:11:50,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:50,253 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 336 transitions. [2019-12-27 15:11:50,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:50,254 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 336 transitions. [2019-12-27 15:11:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:50,254 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:50,254 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:50,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:50,455 INFO L410 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:50,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:50,456 INFO L82 PathProgramCache]: Analyzing trace with hash -733903474, now seen corresponding path program 202 times [2019-12-27 15:11:50,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:50,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433357697] [2019-12-27 15:11:50,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:50,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433357697] [2019-12-27 15:11:50,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338812333] [2019-12-27 15:11:50,535 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:50,581 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:50,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:50,581 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:50,582 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:51,175 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_684 Int)) (and (<= (div (+ (* v_~i~0_684 (- 1)) 2) (- 2)) 3) (<= c_~i~0 (+ v_~i~0_684 c_~j~0)) (<= c_~j~0 (+ (* 2 v_~i~0_684) 3)))) is different from true [2019-12-27 15:11:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:51,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:51,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:51,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1930221252] [2019-12-27 15:11:51,176 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:51,177 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:51,179 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:51,179 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:51,179 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:51,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:51,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:51,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:51,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=195, Unknown=1, NotChecked=30, Total=306 [2019-12-27 15:11:51,180 INFO L87 Difference]: Start difference. First operand 148 states and 336 transitions. Second operand 10 states. [2019-12-27 15:11:51,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:51,464 INFO L93 Difference]: Finished difference Result 191 states and 423 transitions. [2019-12-27 15:11:51,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:51,465 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:51,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:51,465 INFO L225 Difference]: With dead ends: 191 [2019-12-27 15:11:51,465 INFO L226 Difference]: Without dead ends: 190 [2019-12-27 15:11:51,466 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=377, Unknown=1, NotChecked=44, Total=600 [2019-12-27 15:11:51,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-12-27 15:11:51,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 149. [2019-12-27 15:11:51,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:11:51,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 340 transitions. [2019-12-27 15:11:51,469 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 340 transitions. Word has length 14 [2019-12-27 15:11:51,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:51,469 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 340 transitions. [2019-12-27 15:11:51,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 340 transitions. [2019-12-27 15:11:51,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:51,469 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:51,469 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:51,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:51,670 INFO L410 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:51,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:51,671 INFO L82 PathProgramCache]: Analyzing trace with hash -733903629, now seen corresponding path program 203 times [2019-12-27 15:11:51,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:51,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400247506] [2019-12-27 15:11:51,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:51,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400247506] [2019-12-27 15:11:51,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610080519] [2019-12-27 15:11:51,750 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:51,797 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:51,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:51,798 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:51,799 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:51,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:51,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:51,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [508199884] [2019-12-27 15:11:51,918 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:51,919 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:51,921 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:51,921 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:51,922 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:51,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:51,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:51,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:51,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:51,922 INFO L87 Difference]: Start difference. First operand 149 states and 340 transitions. Second operand 10 states. [2019-12-27 15:11:52,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:52,128 INFO L93 Difference]: Finished difference Result 198 states and 434 transitions. [2019-12-27 15:11:52,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:52,129 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:52,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:52,129 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:11:52,129 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 15:11:52,130 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:52,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 15:11:52,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 146. [2019-12-27 15:11:52,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 15:11:52,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 330 transitions. [2019-12-27 15:11:52,132 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 330 transitions. Word has length 14 [2019-12-27 15:11:52,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:52,132 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 330 transitions. [2019-12-27 15:11:52,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:52,132 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 330 transitions. [2019-12-27 15:11:52,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:52,133 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:52,133 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:52,333 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:52,333 INFO L410 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:52,334 INFO L82 PathProgramCache]: Analyzing trace with hash -738367319, now seen corresponding path program 204 times [2019-12-27 15:11:52,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:52,334 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426288268] [2019-12-27 15:11:52,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:52,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426288268] [2019-12-27 15:11:52,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639982485] [2019-12-27 15:11:52,427 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:52,472 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:11:52,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:52,473 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:52,473 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:52,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:52,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:52,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2080789601] [2019-12-27 15:11:52,563 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:52,564 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:52,566 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:52,567 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:52,567 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:52,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:52,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:52,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:52,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:52,568 INFO L87 Difference]: Start difference. First operand 146 states and 330 transitions. Second operand 10 states. [2019-12-27 15:11:52,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:52,785 INFO L93 Difference]: Finished difference Result 187 states and 408 transitions. [2019-12-27 15:11:52,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:52,785 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:52,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:52,786 INFO L225 Difference]: With dead ends: 187 [2019-12-27 15:11:52,786 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 15:11:52,786 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:52,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 15:11:52,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 149. [2019-12-27 15:11:52,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:11:52,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 339 transitions. [2019-12-27 15:11:52,790 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 339 transitions. Word has length 14 [2019-12-27 15:11:52,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:52,790 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 339 transitions. [2019-12-27 15:11:52,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:52,790 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 339 transitions. [2019-12-27 15:11:52,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:52,790 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:52,790 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:52,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:52,991 INFO L410 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:52,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:52,992 INFO L82 PathProgramCache]: Analyzing trace with hash -738367474, now seen corresponding path program 205 times [2019-12-27 15:11:52,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:52,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228814973] [2019-12-27 15:11:52,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:53,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228814973] [2019-12-27 15:11:53,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690704948] [2019-12-27 15:11:53,076 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:53,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:53,125 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:53,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:53,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:53,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [291713999] [2019-12-27 15:11:53,222 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:53,223 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:53,225 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:53,225 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:53,226 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:53,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:53,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:53,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:53,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:53,226 INFO L87 Difference]: Start difference. First operand 149 states and 339 transitions. Second operand 10 states. [2019-12-27 15:11:53,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:53,455 INFO L93 Difference]: Finished difference Result 199 states and 438 transitions. [2019-12-27 15:11:53,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:53,456 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:53,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:53,456 INFO L225 Difference]: With dead ends: 199 [2019-12-27 15:11:53,457 INFO L226 Difference]: Without dead ends: 198 [2019-12-27 15:11:53,457 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:53,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-27 15:11:53,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 148. [2019-12-27 15:11:53,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 15:11:53,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 336 transitions. [2019-12-27 15:11:53,460 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 336 transitions. Word has length 14 [2019-12-27 15:11:53,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:53,460 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 336 transitions. [2019-12-27 15:11:53,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:53,460 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 336 transitions. [2019-12-27 15:11:53,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:53,461 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:53,461 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:53,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:53,662 INFO L410 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:53,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:53,662 INFO L82 PathProgramCache]: Analyzing trace with hash -738372124, now seen corresponding path program 206 times [2019-12-27 15:11:53,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:53,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850258745] [2019-12-27 15:11:53,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:53,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850258745] [2019-12-27 15:11:53,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448727350] [2019-12-27 15:11:53,757 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:53,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:53,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:53,803 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:53,804 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:53,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:53,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:53,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [657405891] [2019-12-27 15:11:53,915 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:53,916 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:53,918 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:53,918 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:53,919 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:53,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:53,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:53,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:53,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:53,919 INFO L87 Difference]: Start difference. First operand 148 states and 336 transitions. Second operand 10 states. [2019-12-27 15:11:54,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:54,137 INFO L93 Difference]: Finished difference Result 189 states and 414 transitions. [2019-12-27 15:11:54,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:54,137 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:54,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:54,138 INFO L225 Difference]: With dead ends: 189 [2019-12-27 15:11:54,138 INFO L226 Difference]: Without dead ends: 188 [2019-12-27 15:11:54,138 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:54,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-27 15:11:54,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 149. [2019-12-27 15:11:54,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:11:54,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 340 transitions. [2019-12-27 15:11:54,141 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 340 transitions. Word has length 14 [2019-12-27 15:11:54,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:54,141 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 340 transitions. [2019-12-27 15:11:54,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:54,142 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 340 transitions. [2019-12-27 15:11:54,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:54,142 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:54,142 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:54,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:54,343 INFO L410 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:54,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:54,343 INFO L82 PathProgramCache]: Analyzing trace with hash -738372279, now seen corresponding path program 207 times [2019-12-27 15:11:54,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:54,344 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354871333] [2019-12-27 15:11:54,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:54,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354871333] [2019-12-27 15:11:54,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423350139] [2019-12-27 15:11:54,424 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:54,469 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:11:54,470 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:54,470 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:54,471 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:54,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:54,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:54,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1694282798] [2019-12-27 15:11:54,590 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:54,591 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:54,593 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:54,593 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:54,593 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:54,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:54,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:54,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:54,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:54,594 INFO L87 Difference]: Start difference. First operand 149 states and 340 transitions. Second operand 10 states. Received shutdown request... [2019-12-27 15:11:54,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 15:11:54,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:54,813 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-27 15:11:54,819 WARN L227 ceAbstractionStarter]: Timeout [2019-12-27 15:11:54,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 03:11:54 BasicIcfg [2019-12-27 15:11:54,819 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 15:11:54,820 INFO L168 Benchmark]: Toolchain (without parser) took 287425.81 ms. Allocated memory was 138.9 MB in the beginning and 217.6 MB in the end (delta: 78.6 MB). Free memory was 102.1 MB in the beginning and 156.7 MB in the end (delta: -54.6 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2019-12-27 15:11:54,821 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-12-27 15:11:54,821 INFO L168 Benchmark]: CACSL2BoogieTranslator took 672.84 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 101.9 MB in the beginning and 161.1 MB in the end (delta: -59.2 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2019-12-27 15:11:54,821 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.21 ms. Allocated memory is still 203.9 MB. Free memory was 161.1 MB in the beginning and 159.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-27 15:11:54,822 INFO L168 Benchmark]: Boogie Preprocessor took 25.11 ms. Allocated memory is still 203.9 MB. Free memory was 159.1 MB in the beginning and 157.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-12-27 15:11:54,822 INFO L168 Benchmark]: RCFGBuilder took 425.50 ms. Allocated memory is still 203.9 MB. Free memory was 157.7 MB in the beginning and 138.0 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2019-12-27 15:11:54,822 INFO L168 Benchmark]: TraceAbstraction took 286225.82 ms. Allocated memory was 203.9 MB in the beginning and 217.6 MB in the end (delta: 13.6 MB). Free memory was 137.4 MB in the beginning and 156.7 MB in the end (delta: -19.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-12-27 15:11:54,823 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 672.84 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 101.9 MB in the beginning and 161.1 MB in the end (delta: -59.2 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 71.21 ms. Allocated memory is still 203.9 MB. Free memory was 161.1 MB in the beginning and 159.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.11 ms. Allocated memory is still 203.9 MB. Free memory was 159.1 MB in the beginning and 157.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 425.50 ms. Allocated memory is still 203.9 MB. Free memory was 157.7 MB in the beginning and 138.0 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 286225.82 ms. Allocated memory was 203.9 MB in the beginning and 217.6 MB in the end (delta: 13.6 MB). Free memory was 137.4 MB in the beginning and 156.7 MB in the end (delta: -19.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 55 ProgramPointsBefore, 16 ProgramPointsAfterwards, 53 TransitionsBefore, 14 TransitionsAfterwards, 836 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 433 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 8 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 686 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (149states) and FLOYD_HOARE automaton (currently 3 states, 10 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 18 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 286.0s, OverallIterations: 221, TraceHistogramMax: 7, AutomataDifference: 111.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 2102 SDtfs, 16738 SDslu, 9617 SDs, 0 SdLazy, 5291 SolverSat, 3254 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5577 GetRequests, 1662 SyntacticMatches, 0 SemanticMatches, 3914 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 15252 ImplicationChecksByTransitivity, 213.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=158occurred in iteration=170, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 220 MinimizatonAttempts, 7434 StatesRemovedByMinimization, 217 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 115.2s InterpolantComputationTime, 5627 NumberOfCodeBlocks, 5627 NumberOfCodeBlocksAsserted, 734 NumberOfCheckSat, 5190 ConstructedInterpolants, 235 QuantifiedInterpolants, 625999 SizeOfPredicates, 0 NumberOfNonLiveVariables, 20228 ConjunctsInSsa, 2382 ConjunctsInUnsatCore, 437 InterpolantComputations, 7 PerfectInterpolantSequences, 36/3264 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