/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.epf -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 18:46:22,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 18:46:22,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 18:46:22,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 18:46:22,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 18:46:22,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 18:46:22,537 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 18:46:22,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 18:46:22,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 18:46:22,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 18:46:22,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 18:46:22,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 18:46:22,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 18:46:22,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 18:46:22,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 18:46:22,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 18:46:22,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 18:46:22,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 18:46:22,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 18:46:22,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 18:46:22,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 18:46:22,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 18:46:22,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 18:46:22,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 18:46:22,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 18:46:22,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 18:46:22,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 18:46:22,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 18:46:22,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 18:46:22,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 18:46:22,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 18:46:22,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 18:46:22,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 18:46:22,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 18:46:22,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 18:46:22,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 18:46:22,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 18:46:22,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 18:46:22,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 18:46:22,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 18:46:22,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 18:46:22,583 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.epf [2020-04-17 18:46:22,604 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 18:46:22,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 18:46:22,607 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 18:46:22,607 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 18:46:22,607 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 18:46:22,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 18:46:22,608 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 18:46:22,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 18:46:22,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 18:46:22,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 18:46:22,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 18:46:22,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 18:46:22,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 18:46:22,610 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 18:46:22,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 18:46:22,611 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 18:46:22,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 18:46:22,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 18:46:22,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 18:46:22,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 18:46:22,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 18:46:22,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 18:46:22,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 18:46:22,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 18:46:22,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 18:46:22,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 18:46:22,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 18:46:22,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 18:46:22,614 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 18:46:22,888 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 18:46:22,900 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 18:46:22,904 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 18:46:22,905 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 18:46:22,905 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 18:46:22,906 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2020-04-17 18:46:22,987 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8ce48df8/8484c5cd81f249bb91f094f4e57d7bb1/FLAGdb488875a [2020-04-17 18:46:23,534 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 18:46:23,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2020-04-17 18:46:23,548 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8ce48df8/8484c5cd81f249bb91f094f4e57d7bb1/FLAGdb488875a [2020-04-17 18:46:23,825 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8ce48df8/8484c5cd81f249bb91f094f4e57d7bb1 [2020-04-17 18:46:23,834 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 18:46:23,856 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 18:46:23,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 18:46:23,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 18:46:23,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 18:46:23,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:46:23" (1/1) ... [2020-04-17 18:46:23,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c57c664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:23, skipping insertion in model container [2020-04-17 18:46:23,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:46:23" (1/1) ... [2020-04-17 18:46:23,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 18:46:23,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 18:46:24,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:46:24,369 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 18:46:24,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:46:24,497 INFO L208 MainTranslator]: Completed translation [2020-04-17 18:46:24,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:24 WrapperNode [2020-04-17 18:46:24,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 18:46:24,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 18:46:24,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 18:46:24,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 18:46:24,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:24" (1/1) ... [2020-04-17 18:46:24,528 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:24" (1/1) ... [2020-04-17 18:46:24,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 18:46:24,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 18:46:24,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 18:46:24,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 18:46:24,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:24" (1/1) ... [2020-04-17 18:46:24,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:24" (1/1) ... [2020-04-17 18:46:24,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:24" (1/1) ... [2020-04-17 18:46:24,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:24" (1/1) ... [2020-04-17 18:46:24,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:24" (1/1) ... [2020-04-17 18:46:24,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:24" (1/1) ... [2020-04-17 18:46:24,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:24" (1/1) ... [2020-04-17 18:46:24,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 18:46:24,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 18:46:24,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 18:46:24,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 18:46:24,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 18:46:24,642 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-17 18:46:24,643 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-17 18:46:24,643 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-17 18:46:24,643 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-17 18:46:24,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 18:46:24,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-17 18:46:24,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 18:46:24,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 18:46:24,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-17 18:46:24,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 18:46:24,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 18:46:24,647 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 18:46:25,009 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 18:46:25,009 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-17 18:46:25,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:46:25 BoogieIcfgContainer [2020-04-17 18:46:25,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 18:46:25,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 18:46:25,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 18:46:25,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 18:46:25,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 06:46:23" (1/3) ... [2020-04-17 18:46:25,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6b8090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:46:25, skipping insertion in model container [2020-04-17 18:46:25,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:24" (2/3) ... [2020-04-17 18:46:25,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6b8090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:46:25, skipping insertion in model container [2020-04-17 18:46:25,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:46:25" (3/3) ... [2020-04-17 18:46:25,023 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-04-17 18:46:25,033 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 18:46:25,034 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 18:46:25,040 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 18:46:25,041 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 18:46:25,067 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,067 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,068 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,068 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,069 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,069 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,069 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,070 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,070 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,070 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,071 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,071 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,071 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,071 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,072 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,072 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,072 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,073 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,073 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,073 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,073 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,074 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,074 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,075 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,075 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,075 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,075 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,076 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,079 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,080 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,080 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,080 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,080 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,081 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,088 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,088 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,089 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,089 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,089 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,089 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:25,114 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-17 18:46:25,137 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:46:25,139 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:46:25,139 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:46:25,140 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:46:25,140 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:46:25,140 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:46:25,140 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:46:25,141 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:46:25,161 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-04-17 18:46:25,163 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-17 18:46:25,219 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-17 18:46:25,221 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 18:46:25,226 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-04-17 18:46:25,229 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-17 18:46:25,246 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-17 18:46:25,247 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 18:46:25,248 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-04-17 18:46:25,250 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-04-17 18:46:25,251 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:46:26,471 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-04-17 18:46:26,735 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-04-17 18:46:26,735 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-04-17 18:46:26,739 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-04-17 18:46:26,749 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 18:46:26,752 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 18:46:26,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-17 18:46:26,769 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:26,770 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-17 18:46:26,770 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:26,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:26,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-04-17 18:46:26,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:26,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665370804] [2020-04-17 18:46:26,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:27,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665370804] [2020-04-17 18:46:27,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:46:27,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 18:46:27,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041152951] [2020-04-17 18:46:27,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 18:46:27,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:27,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 18:46:27,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:46:27,129 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-17 18:46:27,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:27,224 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-04-17 18:46:27,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 18:46:27,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-17 18:46:27,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:27,243 INFO L225 Difference]: With dead ends: 75 [2020-04-17 18:46:27,243 INFO L226 Difference]: Without dead ends: 42 [2020-04-17 18:46:27,245 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:46:27,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-04-17 18:46:27,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-04-17 18:46:27,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 18:46:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-04-17 18:46:27,290 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-04-17 18:46:27,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:27,291 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-04-17 18:46:27,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 18:46:27,291 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-04-17 18:46:27,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 18:46:27,292 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:27,292 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:27,292 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:27,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:27,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-04-17 18:46:27,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:27,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436528141] [2020-04-17 18:46:27,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:27,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436528141] [2020-04-17 18:46:27,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:46:27,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:46:27,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389699147] [2020-04-17 18:46:27,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 18:46:27,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:27,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 18:46:27,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:46:27,408 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-04-17 18:46:27,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:27,441 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-04-17 18:46:27,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:46:27,441 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 18:46:27,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:27,442 INFO L225 Difference]: With dead ends: 56 [2020-04-17 18:46:27,443 INFO L226 Difference]: Without dead ends: 50 [2020-04-17 18:46:27,443 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:46:27,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-04-17 18:46:27,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-04-17 18:46:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 18:46:27,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-04-17 18:46:27,451 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-04-17 18:46:27,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:27,452 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-04-17 18:46:27,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 18:46:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-04-17 18:46:27,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:46:27,454 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:27,454 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:27,454 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:27,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:27,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-04-17 18:46:27,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:27,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968588503] [2020-04-17 18:46:27,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:27,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968588503] [2020-04-17 18:46:27,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:46:27,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:46:27,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996379725] [2020-04-17 18:46:27,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:46:27,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:27,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:46:27,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:46:27,530 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-04-17 18:46:27,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:27,645 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-04-17 18:46:27,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:46:27,648 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:46:27,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:27,650 INFO L225 Difference]: With dead ends: 78 [2020-04-17 18:46:27,650 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 18:46:27,650 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:27,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 18:46:27,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-04-17 18:46:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 18:46:27,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 18:46:27,661 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-04-17 18:46:27,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:27,662 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 18:46:27,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:46:27,663 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 18:46:27,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:46:27,664 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:27,664 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:27,664 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:27,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:27,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-04-17 18:46:27,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:27,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658625765] [2020-04-17 18:46:27,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:27,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658625765] [2020-04-17 18:46:27,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:46:27,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:46:27,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98730691] [2020-04-17 18:46:27,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:46:27,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:27,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:46:27,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:46:27,761 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-04-17 18:46:27,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:27,842 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-04-17 18:46:27,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:46:27,843 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:46:27,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:27,844 INFO L225 Difference]: With dead ends: 54 [2020-04-17 18:46:27,844 INFO L226 Difference]: Without dead ends: 43 [2020-04-17 18:46:27,845 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:27,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-04-17 18:46:27,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-04-17 18:46:27,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-17 18:46:27,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-04-17 18:46:27,850 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-04-17 18:46:27,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:27,851 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-04-17 18:46:27,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:46:27,851 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-04-17 18:46:27,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:46:27,852 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:27,852 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:27,852 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:27,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:27,852 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-04-17 18:46:27,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:27,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557180449] [2020-04-17 18:46:27,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:27,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557180449] [2020-04-17 18:46:27,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:46:27,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:46:27,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045989960] [2020-04-17 18:46:27,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:46:27,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:27,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:46:27,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:46:27,928 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-04-17 18:46:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:28,018 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-04-17 18:46:28,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:46:28,020 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:46:28,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:28,021 INFO L225 Difference]: With dead ends: 57 [2020-04-17 18:46:28,022 INFO L226 Difference]: Without dead ends: 51 [2020-04-17 18:46:28,022 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:28,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-04-17 18:46:28,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-04-17 18:46:28,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-04-17 18:46:28,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-04-17 18:46:28,027 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-04-17 18:46:28,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:28,028 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-04-17 18:46:28,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:46:28,028 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-04-17 18:46:28,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:46:28,029 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:28,029 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:28,029 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:28,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:28,030 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-04-17 18:46:28,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:28,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363571503] [2020-04-17 18:46:28,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:28,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363571503] [2020-04-17 18:46:28,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268638648] [2020-04-17 18:46:28,134 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:28,211 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:28,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:28,214 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:46:28,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:28,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:28,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:28,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:28,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 18:46:28,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887920644] [2020-04-17 18:46:28,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 18:46:28,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:28,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 18:46:28,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-04-17 18:46:28,285 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-04-17 18:46:28,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:28,418 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-04-17 18:46:28,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:46:28,419 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 18:46:28,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:28,420 INFO L225 Difference]: With dead ends: 48 [2020-04-17 18:46:28,420 INFO L226 Difference]: Without dead ends: 43 [2020-04-17 18:46:28,421 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:28,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-04-17 18:46:28,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-04-17 18:46:28,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-17 18:46:28,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-04-17 18:46:28,430 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-04-17 18:46:28,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:28,431 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-04-17 18:46:28,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 18:46:28,431 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-04-17 18:46:28,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:46:28,432 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:28,432 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:28,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:28,638 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:28,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:28,638 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-04-17 18:46:28,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:28,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242152834] [2020-04-17 18:46:28,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:28,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242152834] [2020-04-17 18:46:28,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281935965] [2020-04-17 18:46:28,718 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:28,773 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:28,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:28,775 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:46:28,776 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:28,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:28,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-17 18:46:28,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116711047] [2020-04-17 18:46:28,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 18:46:28,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:28,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 18:46:28,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 18:46:28,786 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-04-17 18:46:28,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:28,862 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-04-17 18:46:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:46:28,863 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-04-17 18:46:28,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:28,864 INFO L225 Difference]: With dead ends: 54 [2020-04-17 18:46:28,864 INFO L226 Difference]: Without dead ends: 48 [2020-04-17 18:46:28,865 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:28,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-04-17 18:46:28,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-04-17 18:46:28,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 18:46:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-04-17 18:46:28,870 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-04-17 18:46:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:28,870 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-04-17 18:46:28,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 18:46:28,871 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-04-17 18:46:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:46:28,871 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:28,872 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:29,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:29,081 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:29,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:29,082 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-04-17 18:46:29,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:29,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907346329] [2020-04-17 18:46:29,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:29,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907346329] [2020-04-17 18:46:29,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221131434] [2020-04-17 18:46:29,161 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:29,208 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:46:29,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:29,209 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:46:29,210 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:29,231 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:29,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:29,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 18:46:29,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255476933] [2020-04-17 18:46:29,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 18:46:29,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:29,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 18:46:29,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-04-17 18:46:29,246 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-04-17 18:46:29,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:29,360 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-04-17 18:46:29,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:46:29,360 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 18:46:29,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:29,361 INFO L225 Difference]: With dead ends: 58 [2020-04-17 18:46:29,362 INFO L226 Difference]: Without dead ends: 52 [2020-04-17 18:46:29,362 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:29,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-04-17 18:46:29,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-04-17 18:46:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-04-17 18:46:29,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-04-17 18:46:29,367 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-04-17 18:46:29,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:29,367 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-04-17 18:46:29,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 18:46:29,368 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-04-17 18:46:29,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:46:29,368 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:29,368 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:29,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:29,572 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:29,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:29,573 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-04-17 18:46:29,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:29,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580959450] [2020-04-17 18:46:29,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:29,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580959450] [2020-04-17 18:46:29,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938015341] [2020-04-17 18:46:29,655 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:29,717 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:46:29,718 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:29,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:29,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-17 18:46:29,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068133744] [2020-04-17 18:46:29,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 18:46:29,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:29,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 18:46:29,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-04-17 18:46:29,731 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-04-17 18:46:29,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:29,866 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-04-17 18:46:29,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:29,868 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-04-17 18:46:29,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:29,869 INFO L225 Difference]: With dead ends: 78 [2020-04-17 18:46:29,869 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 18:46:29,869 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:29,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 18:46:29,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-04-17 18:46:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 18:46:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-04-17 18:46:29,876 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-04-17 18:46:29,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:29,877 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-04-17 18:46:29,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 18:46:29,877 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-04-17 18:46:29,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:46:29,878 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:29,878 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:30,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:30,084 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:30,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:30,085 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-04-17 18:46:30,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:30,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825544520] [2020-04-17 18:46:30,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:30,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825544520] [2020-04-17 18:46:30,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285033202] [2020-04-17 18:46:30,152 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:30,208 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:30,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:30,209 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:46:30,210 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:30,228 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:30,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:30,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 18:46:30,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502345274] [2020-04-17 18:46:30,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 18:46:30,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:30,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 18:46:30,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-04-17 18:46:30,237 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-04-17 18:46:30,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:30,413 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-04-17 18:46:30,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:46:30,413 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 18:46:30,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:30,415 INFO L225 Difference]: With dead ends: 62 [2020-04-17 18:46:30,415 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 18:46:30,415 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:46:30,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 18:46:30,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-04-17 18:46:30,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-04-17 18:46:30,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-04-17 18:46:30,421 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-04-17 18:46:30,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:30,421 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-04-17 18:46:30,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 18:46:30,421 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-04-17 18:46:30,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:46:30,422 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:30,422 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:30,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:30,626 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:30,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:30,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-04-17 18:46:30,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:30,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28469306] [2020-04-17 18:46:30,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:30,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28469306] [2020-04-17 18:46:30,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899159911] [2020-04-17 18:46:30,736 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 [2020-04-17 18:46:30,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:46:30,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:30,806 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:46:30,807 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:30,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:30,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-17 18:46:30,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28413884] [2020-04-17 18:46:30,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 18:46:30,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:30,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 18:46:30,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-04-17 18:46:30,838 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-04-17 18:46:30,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:30,958 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-04-17 18:46:30,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:46:30,959 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-04-17 18:46:30,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:30,960 INFO L225 Difference]: With dead ends: 64 [2020-04-17 18:46:30,960 INFO L226 Difference]: Without dead ends: 58 [2020-04-17 18:46:30,961 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:30,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-04-17 18:46:30,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-04-17 18:46:30,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-04-17 18:46:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-04-17 18:46:30,968 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-04-17 18:46:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:30,969 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-04-17 18:46:30,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 18:46:30,974 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-04-17 18:46:30,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:46:30,975 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:30,975 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:31,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:31,180 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:31,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:31,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-04-17 18:46:31,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:31,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963263470] [2020-04-17 18:46:31,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:31,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963263470] [2020-04-17 18:46:31,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260184673] [2020-04-17 18:46:31,247 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:31,290 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:31,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:31,291 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:46:31,292 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:31,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:31,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:31,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 18:46:31,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789517278] [2020-04-17 18:46:31,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:46:31,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:31,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:46:31,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:31,327 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-04-17 18:46:31,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:31,493 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-04-17 18:46:31,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:46:31,494 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 18:46:31,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:31,495 INFO L225 Difference]: With dead ends: 61 [2020-04-17 18:46:31,496 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 18:46:31,496 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:46:31,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 18:46:31,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-04-17 18:46:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-04-17 18:46:31,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-04-17 18:46:31,504 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-04-17 18:46:31,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:31,504 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-04-17 18:46:31,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:46:31,504 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-04-17 18:46:31,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:46:31,505 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:31,505 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:31,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:31,716 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:31,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:31,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-04-17 18:46:31,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:31,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787663514] [2020-04-17 18:46:31,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:31,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787663514] [2020-04-17 18:46:31,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555683046] [2020-04-17 18:46:31,793 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 [2020-04-17 18:46:31,842 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:31,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:31,843 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:46:31,844 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:31,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:31,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-17 18:46:31,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973845521] [2020-04-17 18:46:31,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 18:46:31,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:31,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 18:46:31,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-04-17 18:46:31,877 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-04-17 18:46:32,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:32,009 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-04-17 18:46:32,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:32,009 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-04-17 18:46:32,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:32,010 INFO L225 Difference]: With dead ends: 77 [2020-04-17 18:46:32,010 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 18:46:32,011 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:46:32,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 18:46:32,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-04-17 18:46:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-04-17 18:46:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-04-17 18:46:32,020 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-04-17 18:46:32,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:32,021 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-04-17 18:46:32,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 18:46:32,021 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-04-17 18:46:32,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:46:32,022 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:32,022 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:32,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:32,223 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:32,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:32,224 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-04-17 18:46:32,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:32,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912933501] [2020-04-17 18:46:32,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:32,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912933501] [2020-04-17 18:46:32,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961117863] [2020-04-17 18:46:32,282 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 [2020-04-17 18:46:32,327 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:46:32,327 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:32,328 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:32,329 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:32,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:32,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 18:46:32,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314584694] [2020-04-17 18:46:32,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:46:32,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:32,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:46:32,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:32,350 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-04-17 18:46:32,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:32,520 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-04-17 18:46:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:46:32,525 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 18:46:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:32,526 INFO L225 Difference]: With dead ends: 56 [2020-04-17 18:46:32,526 INFO L226 Difference]: Without dead ends: 48 [2020-04-17 18:46:32,527 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:46:32,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-04-17 18:46:32,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-04-17 18:46:32,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-04-17 18:46:32,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-04-17 18:46:32,529 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-04-17 18:46:32,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:32,530 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-04-17 18:46:32,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:46:32,530 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-04-17 18:46:32,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:46:32,531 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:32,531 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:32,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:32,735 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:32,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:32,736 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-04-17 18:46:32,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:32,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232535784] [2020-04-17 18:46:32,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:32,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:32,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232535784] [2020-04-17 18:46:32,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258457691] [2020-04-17 18:46:32,802 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 [2020-04-17 18:46:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:32,855 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:46:32,857 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:32,870 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:32,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:32,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 18:46:32,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811251366] [2020-04-17 18:46:32,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:46:32,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:32,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:46:32,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:32,880 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-04-17 18:46:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:33,066 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-04-17 18:46:33,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:33,066 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 18:46:33,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:33,067 INFO L225 Difference]: With dead ends: 60 [2020-04-17 18:46:33,068 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 18:46:33,068 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:46:33,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 18:46:33,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-04-17 18:46:33,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 18:46:33,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 18:46:33,072 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-04-17 18:46:33,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:33,072 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 18:46:33,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:46:33,073 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 18:46:33,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:33,073 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:33,073 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:33,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:33,277 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:33,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:33,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-04-17 18:46:33,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:33,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057047647] [2020-04-17 18:46:33,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:33,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057047647] [2020-04-17 18:46:33,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260837504] [2020-04-17 18:46:33,351 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 [2020-04-17 18:46:33,408 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:33,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:33,409 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:33,412 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:33,428 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:33,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:33,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 18:46:33,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136133765] [2020-04-17 18:46:33,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:33,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:33,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:33,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:33,439 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-04-17 18:46:33,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:33,657 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-04-17 18:46:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:33,657 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 18:46:33,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:33,658 INFO L225 Difference]: With dead ends: 54 [2020-04-17 18:46:33,658 INFO L226 Difference]: Without dead ends: 49 [2020-04-17 18:46:33,659 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:46:33,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-04-17 18:46:33,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-04-17 18:46:33,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-04-17 18:46:33,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-04-17 18:46:33,663 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-04-17 18:46:33,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:33,663 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-04-17 18:46:33,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:33,663 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-04-17 18:46:33,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:33,664 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:33,664 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:33,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:33,867 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:33,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:33,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-04-17 18:46:33,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:33,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488793093] [2020-04-17 18:46:33,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:33,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488793093] [2020-04-17 18:46:33,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472642490] [2020-04-17 18:46:33,937 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:33,985 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:46:33,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:33,986 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:33,987 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:33,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:34,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 18:46:34,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471351061] [2020-04-17 18:46:34,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:46:34,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:34,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:46:34,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:34,001 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-04-17 18:46:34,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:34,095 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-04-17 18:46:34,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:46:34,096 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 18:46:34,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:34,097 INFO L225 Difference]: With dead ends: 60 [2020-04-17 18:46:34,097 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 18:46:34,097 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:46:34,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 18:46:34,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-04-17 18:46:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 18:46:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-04-17 18:46:34,101 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-04-17 18:46:34,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:34,102 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-04-17 18:46:34,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:46:34,102 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-04-17 18:46:34,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:34,103 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:34,103 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:34,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:34,308 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:34,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:34,308 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-04-17 18:46:34,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:34,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015294887] [2020-04-17 18:46:34,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:34,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015294887] [2020-04-17 18:46:34,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840632400] [2020-04-17 18:46:34,391 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:34,444 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:34,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:34,445 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:34,446 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:34,457 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:34,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:34,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 18:46:34,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898130294] [2020-04-17 18:46:34,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:34,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:34,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:34,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:34,467 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-04-17 18:46:34,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:34,598 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-04-17 18:46:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:46:34,599 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 18:46:34,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:34,600 INFO L225 Difference]: With dead ends: 66 [2020-04-17 18:46:34,600 INFO L226 Difference]: Without dead ends: 60 [2020-04-17 18:46:34,601 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:46:34,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-17 18:46:34,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-04-17 18:46:34,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-04-17 18:46:34,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-04-17 18:46:34,604 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-04-17 18:46:34,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:34,604 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-04-17 18:46:34,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:34,604 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-04-17 18:46:34,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:34,604 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:34,605 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:34,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:34,805 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:34,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:34,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-04-17 18:46:34,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:34,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816118750] [2020-04-17 18:46:34,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:34,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816118750] [2020-04-17 18:46:34,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231762918] [2020-04-17 18:46:34,873 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:34,929 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:46:34,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:34,930 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:34,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:34,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:34,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 18:46:34,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077867923] [2020-04-17 18:46:34,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:46:34,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:34,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:46:34,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:34,946 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-04-17 18:46:35,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:35,111 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-04-17 18:46:35,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:46:35,111 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 18:46:35,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:35,112 INFO L225 Difference]: With dead ends: 67 [2020-04-17 18:46:35,113 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 18:46:35,113 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:35,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 18:46:35,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-04-17 18:46:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-04-17 18:46:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-04-17 18:46:35,117 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-04-17 18:46:35,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:35,117 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-04-17 18:46:35,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:46:35,117 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-04-17 18:46:35,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:35,118 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:35,118 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:35,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:35,321 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:35,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:35,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-04-17 18:46:35,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:35,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787810347] [2020-04-17 18:46:35,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:35,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:35,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787810347] [2020-04-17 18:46:35,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304969324] [2020-04-17 18:46:35,405 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:35,455 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:46:35,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:35,456 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:35,457 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:35,471 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:35,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:35,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 18:46:35,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225596951] [2020-04-17 18:46:35,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:35,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:35,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:35,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:35,482 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-04-17 18:46:35,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:35,692 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-04-17 18:46:35,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:46:35,693 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 18:46:35,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:35,694 INFO L225 Difference]: With dead ends: 69 [2020-04-17 18:46:35,694 INFO L226 Difference]: Without dead ends: 63 [2020-04-17 18:46:35,695 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:46:35,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-04-17 18:46:35,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-04-17 18:46:35,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 18:46:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 18:46:35,699 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-04-17 18:46:35,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:35,699 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 18:46:35,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:35,699 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 18:46:35,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:35,700 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:35,700 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:35,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:35,904 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:35,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:35,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-04-17 18:46:35,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:35,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730707780] [2020-04-17 18:46:35,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:35,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730707780] [2020-04-17 18:46:35,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100937073] [2020-04-17 18:46:35,962 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:36,004 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:36,005 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:36,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:36,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 18:46:36,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716738693] [2020-04-17 18:46:36,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:46:36,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:36,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:46:36,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:36,025 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-04-17 18:46:36,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:36,222 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-04-17 18:46:36,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:46:36,224 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 18:46:36,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:36,225 INFO L225 Difference]: With dead ends: 88 [2020-04-17 18:46:36,226 INFO L226 Difference]: Without dead ends: 82 [2020-04-17 18:46:36,226 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:46:36,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-04-17 18:46:36,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-04-17 18:46:36,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 18:46:36,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-04-17 18:46:36,229 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-04-17 18:46:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:36,230 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-04-17 18:46:36,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:46:36,230 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-04-17 18:46:36,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:36,230 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:36,231 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:36,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:36,434 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:36,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:36,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-04-17 18:46:36,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:36,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411598392] [2020-04-17 18:46:36,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:36,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411598392] [2020-04-17 18:46:36,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959045539] [2020-04-17 18:46:36,499 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:36,547 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:36,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:36,548 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:36,549 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:36,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:36,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 18:46:36,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214130812] [2020-04-17 18:46:36,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:36,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:36,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:36,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:36,579 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-04-17 18:46:36,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:36,886 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-04-17 18:46:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:46:36,887 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 18:46:36,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:36,887 INFO L225 Difference]: With dead ends: 69 [2020-04-17 18:46:36,888 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 18:46:36,888 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:46:36,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 18:46:36,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-04-17 18:46:36,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-04-17 18:46:36,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-04-17 18:46:36,892 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-04-17 18:46:36,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:36,892 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-04-17 18:46:36,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:36,892 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-04-17 18:46:36,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:36,895 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:36,895 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:37,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:37,096 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:37,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:37,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-04-17 18:46:37,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:37,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305404741] [2020-04-17 18:46:37,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:37,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305404741] [2020-04-17 18:46:37,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093121021] [2020-04-17 18:46:37,207 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:37,252 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:46:37,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:37,254 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:37,255 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:37,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:37,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 18:46:37,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872835398] [2020-04-17 18:46:37,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:37,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:37,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:37,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:37,270 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-04-17 18:46:37,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:37,413 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-04-17 18:46:37,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:37,413 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 18:46:37,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:37,414 INFO L225 Difference]: With dead ends: 74 [2020-04-17 18:46:37,414 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 18:46:37,415 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:37,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 18:46:37,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-04-17 18:46:37,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 18:46:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 18:46:37,418 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-04-17 18:46:37,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:37,420 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 18:46:37,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:37,420 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 18:46:37,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:37,421 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:37,421 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:37,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:37,625 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:37,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:37,626 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-04-17 18:46:37,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:37,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039803399] [2020-04-17 18:46:37,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:37,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039803399] [2020-04-17 18:46:37,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48869245] [2020-04-17 18:46:37,726 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:37,780 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:37,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:37,781 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:37,782 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:37,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:37,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:37,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 18:46:37,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687052104] [2020-04-17 18:46:37,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:37,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:37,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:37,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:37,811 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-04-17 18:46:38,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:38,016 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-04-17 18:46:38,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:46:38,017 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 18:46:38,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:38,017 INFO L225 Difference]: With dead ends: 71 [2020-04-17 18:46:38,018 INFO L226 Difference]: Without dead ends: 65 [2020-04-17 18:46:38,018 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:46:38,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-04-17 18:46:38,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-04-17 18:46:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 18:46:38,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 18:46:38,021 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-04-17 18:46:38,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:38,021 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 18:46:38,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:38,021 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 18:46:38,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:38,022 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:38,022 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:38,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:38,225 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:38,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:38,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-04-17 18:46:38,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:38,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442769991] [2020-04-17 18:46:38,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:38,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442769991] [2020-04-17 18:46:38,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534121764] [2020-04-17 18:46:38,299 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:38,350 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:46:38,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:38,351 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:38,352 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:38,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:38,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 18:46:38,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586861641] [2020-04-17 18:46:38,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:38,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:38,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:38,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:38,369 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-04-17 18:46:38,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:38,548 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-04-17 18:46:38,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:46:38,549 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 18:46:38,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:38,550 INFO L225 Difference]: With dead ends: 68 [2020-04-17 18:46:38,550 INFO L226 Difference]: Without dead ends: 62 [2020-04-17 18:46:38,551 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:46:38,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-17 18:46:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-04-17 18:46:38,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 18:46:38,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 18:46:38,553 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-04-17 18:46:38,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:38,554 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 18:46:38,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:38,554 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 18:46:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:38,554 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:38,554 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:38,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:38,758 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:38,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:38,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-04-17 18:46:38,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:38,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337773503] [2020-04-17 18:46:38,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:38,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337773503] [2020-04-17 18:46:38,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802126536] [2020-04-17 18:46:38,829 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:38,896 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:46:38,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:38,897 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:38,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:38,936 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:38,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:38,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:38,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 18:46:38,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101445452] [2020-04-17 18:46:38,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:38,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:38,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:38,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:38,949 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-04-17 18:46:39,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:39,225 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-04-17 18:46:39,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:46:39,226 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 18:46:39,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:39,226 INFO L225 Difference]: With dead ends: 67 [2020-04-17 18:46:39,226 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 18:46:39,227 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:46:39,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 18:46:39,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-04-17 18:46:39,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 18:46:39,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 18:46:39,229 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-04-17 18:46:39,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:39,230 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 18:46:39,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:39,230 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 18:46:39,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:39,230 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:39,230 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:39,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:39,434 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:39,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:39,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-04-17 18:46:39,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:39,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772547386] [2020-04-17 18:46:39,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:39,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772547386] [2020-04-17 18:46:39,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393560618] [2020-04-17 18:46:39,500 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:39,557 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:39,558 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:39,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:39,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 18:46:39,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476800456] [2020-04-17 18:46:39,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:39,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:39,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:39,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:39,584 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-04-17 18:46:39,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:39,806 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-04-17 18:46:39,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:46:39,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 18:46:39,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:39,808 INFO L225 Difference]: With dead ends: 83 [2020-04-17 18:46:39,808 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 18:46:39,809 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:46:39,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 18:46:39,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-04-17 18:46:39,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 18:46:39,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-04-17 18:46:39,811 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-04-17 18:46:39,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:39,812 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-04-17 18:46:39,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:39,812 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-04-17 18:46:39,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:39,812 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:39,812 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:40,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:40,013 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:40,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:40,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-04-17 18:46:40,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:40,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300824630] [2020-04-17 18:46:40,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:40,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300824630] [2020-04-17 18:46:40,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039734295] [2020-04-17 18:46:40,101 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:40,168 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:40,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:40,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:40,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:40,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:40,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 18:46:40,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465959590] [2020-04-17 18:46:40,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:40,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:40,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:40,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:40,233 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-04-17 18:46:40,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:40,514 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-04-17 18:46:40,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:46:40,515 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 18:46:40,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:40,515 INFO L225 Difference]: With dead ends: 62 [2020-04-17 18:46:40,516 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 18:46:40,516 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:46:40,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 18:46:40,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-04-17 18:46:40,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-04-17 18:46:40,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-04-17 18:46:40,519 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-04-17 18:46:40,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:40,519 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-04-17 18:46:40,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:40,520 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-04-17 18:46:40,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:40,520 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:40,520 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:40,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:40,724 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:40,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:40,724 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-04-17 18:46:40,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:40,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389879725] [2020-04-17 18:46:40,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:40,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389879725] [2020-04-17 18:46:40,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756886191] [2020-04-17 18:46:40,785 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:40,844 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:46:40,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:40,845 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:40,846 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:40,858 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:40,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:40,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 18:46:40,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296919305] [2020-04-17 18:46:40,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:40,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:40,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:40,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:40,872 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-04-17 18:46:41,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:41,177 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-04-17 18:46:41,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:46:41,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 18:46:41,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:41,178 INFO L225 Difference]: With dead ends: 68 [2020-04-17 18:46:41,178 INFO L226 Difference]: Without dead ends: 63 [2020-04-17 18:46:41,178 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:46:41,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-04-17 18:46:41,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-04-17 18:46:41,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 18:46:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-04-17 18:46:41,181 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-04-17 18:46:41,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:41,183 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-04-17 18:46:41,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:41,183 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-04-17 18:46:41,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:41,183 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:41,184 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:41,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:41,387 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:41,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:41,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-04-17 18:46:41,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:41,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323783512] [2020-04-17 18:46:41,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:41,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323783512] [2020-04-17 18:46:41,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470457056] [2020-04-17 18:46:41,475 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:41,524 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:41,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:41,525 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:41,525 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:41,537 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:41,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:41,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:41,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 18:46:41,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287203749] [2020-04-17 18:46:41,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:41,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:41,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:41,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:41,549 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-04-17 18:46:41,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:41,837 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-04-17 18:46:41,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:46:41,837 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 18:46:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:41,838 INFO L225 Difference]: With dead ends: 60 [2020-04-17 18:46:41,839 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 18:46:41,839 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:46:41,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 18:46:41,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-04-17 18:46:41,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 18:46:41,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-04-17 18:46:41,842 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-04-17 18:46:41,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:41,842 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-04-17 18:46:41,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:41,843 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-04-17 18:46:41,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:41,843 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:41,843 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:42,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:42,047 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:42,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:42,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-04-17 18:46:42,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:42,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50432022] [2020-04-17 18:46:42,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:42,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50432022] [2020-04-17 18:46:42,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966755359] [2020-04-17 18:46:42,135 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:42,182 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 18:46:42,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:42,183 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:42,183 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:42,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:42,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 18:46:42,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445748617] [2020-04-17 18:46:42,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:42,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:42,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:42,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:42,191 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-04-17 18:46:42,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:42,329 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-04-17 18:46:42,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:42,329 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 18:46:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:42,330 INFO L225 Difference]: With dead ends: 66 [2020-04-17 18:46:42,331 INFO L226 Difference]: Without dead ends: 60 [2020-04-17 18:46:42,331 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:46:42,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-17 18:46:42,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-04-17 18:46:42,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 18:46:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-04-17 18:46:42,334 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-04-17 18:46:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:42,335 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-04-17 18:46:42,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:42,335 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-04-17 18:46:42,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:42,335 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:42,336 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:42,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:42,539 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:42,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:42,540 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-04-17 18:46:42,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:42,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490876863] [2020-04-17 18:46:42,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:42,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:42,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490876863] [2020-04-17 18:46:42,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645435005] [2020-04-17 18:46:42,682 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:42,772 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 18:46:42,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:42,774 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:42,775 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:42,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:42,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:42,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 18:46:42,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310301886] [2020-04-17 18:46:42,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:42,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:42,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:42,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:42,819 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-04-17 18:46:43,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:43,087 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-04-17 18:46:43,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:46:43,088 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 18:46:43,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:43,092 INFO L225 Difference]: With dead ends: 74 [2020-04-17 18:46:43,093 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 18:46:43,093 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:46:43,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 18:46:43,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-04-17 18:46:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-04-17 18:46:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-04-17 18:46:43,098 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-04-17 18:46:43,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:43,098 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-04-17 18:46:43,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:43,099 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-04-17 18:46:43,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:43,099 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:43,099 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:43,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:43,306 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:43,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:43,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-04-17 18:46:43,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:43,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699738941] [2020-04-17 18:46:43,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:43,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699738941] [2020-04-17 18:46:43,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240955148] [2020-04-17 18:46:43,393 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:43,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:43,444 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:43,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:43,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 18:46:43,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964047935] [2020-04-17 18:46:43,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:43,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:43,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:43,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:43,460 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-04-17 18:46:43,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:43,665 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-04-17 18:46:43,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:46:43,666 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 18:46:43,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:43,667 INFO L225 Difference]: With dead ends: 75 [2020-04-17 18:46:43,667 INFO L226 Difference]: Without dead ends: 69 [2020-04-17 18:46:43,668 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:46:43,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-04-17 18:46:43,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-04-17 18:46:43,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 18:46:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 18:46:43,671 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-04-17 18:46:43,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:43,671 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 18:46:43,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:43,672 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 18:46:43,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:43,672 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:43,672 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:43,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:43,875 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:43,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:43,876 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-04-17 18:46:43,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:43,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623873796] [2020-04-17 18:46:43,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:43,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623873796] [2020-04-17 18:46:43,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997330383] [2020-04-17 18:46:43,953 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:44,004 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:44,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:44,005 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:44,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:44,035 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:44,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:44,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 18:46:44,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081611121] [2020-04-17 18:46:44,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:44,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:44,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:44,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:44,049 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-04-17 18:46:44,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:44,265 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-04-17 18:46:44,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:46:44,266 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 18:46:44,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:44,266 INFO L225 Difference]: With dead ends: 79 [2020-04-17 18:46:44,267 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 18:46:44,267 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:46:44,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 18:46:44,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-04-17 18:46:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 18:46:44,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 18:46:44,270 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-04-17 18:46:44,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:44,270 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 18:46:44,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:44,270 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 18:46:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:44,270 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:44,271 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:44,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:44,474 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:44,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:44,475 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-04-17 18:46:44,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:44,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785296914] [2020-04-17 18:46:44,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:44,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785296914] [2020-04-17 18:46:44,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061126952] [2020-04-17 18:46:44,602 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:44,670 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:46:44,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:44,672 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:44,678 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:44,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:44,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 18:46:44,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587328024] [2020-04-17 18:46:44,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:44,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:44,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:44,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:44,703 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-04-17 18:46:45,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:45,070 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-04-17 18:46:45,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:46:45,071 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 18:46:45,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:45,072 INFO L225 Difference]: With dead ends: 79 [2020-04-17 18:46:45,072 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 18:46:45,073 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:46:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 18:46:45,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-04-17 18:46:45,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-04-17 18:46:45,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-04-17 18:46:45,077 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-04-17 18:46:45,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:45,078 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-04-17 18:46:45,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:45,078 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-04-17 18:46:45,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:45,079 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:45,079 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:45,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:45,283 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:45,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:45,284 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-04-17 18:46:45,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:45,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778841211] [2020-04-17 18:46:45,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:45,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778841211] [2020-04-17 18:46:45,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559215013] [2020-04-17 18:46:45,363 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:45,409 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:45,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:45,410 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:45,411 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:45,454 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:45,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:45,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 18:46:45,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977846065] [2020-04-17 18:46:45,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:45,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:45,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:45,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:45,464 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-04-17 18:46:45,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:45,776 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-04-17 18:46:45,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:46:45,776 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 18:46:45,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:45,777 INFO L225 Difference]: With dead ends: 76 [2020-04-17 18:46:45,777 INFO L226 Difference]: Without dead ends: 70 [2020-04-17 18:46:45,778 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:46:45,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-17 18:46:45,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-04-17 18:46:45,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 18:46:45,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-04-17 18:46:45,781 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-04-17 18:46:45,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:45,782 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-04-17 18:46:45,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:45,782 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-04-17 18:46:45,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:45,782 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:45,782 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:45,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:45,986 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:45,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:45,986 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-04-17 18:46:45,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:45,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504872910] [2020-04-17 18:46:45,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:46,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:46,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504872910] [2020-04-17 18:46:46,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92709905] [2020-04-17 18:46:46,063 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:46,106 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 18:46:46,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:46,107 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:46,108 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:46,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:46,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 18:46:46,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899459209] [2020-04-17 18:46:46,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:46,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:46,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:46,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:46,126 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-04-17 18:46:46,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:46,383 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-04-17 18:46:46,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:46:46,384 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 18:46:46,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:46,385 INFO L225 Difference]: With dead ends: 96 [2020-04-17 18:46:46,385 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 18:46:46,386 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:46:46,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 18:46:46,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-04-17 18:46:46,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 18:46:46,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-04-17 18:46:46,389 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-04-17 18:46:46,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:46,389 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-04-17 18:46:46,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:46,389 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-04-17 18:46:46,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:46,390 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:46,390 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:46,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:46,594 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:46,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:46,595 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-04-17 18:46:46,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:46,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249907918] [2020-04-17 18:46:46,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:46,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249907918] [2020-04-17 18:46:46,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695231904] [2020-04-17 18:46:46,682 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:46,734 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 18:46:46,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:46,735 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:46,736 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:46,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:46,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 18:46:46,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793335210] [2020-04-17 18:46:46,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:46,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:46,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:46,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:46,772 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-04-17 18:46:47,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:47,149 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-04-17 18:46:47,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:46:47,149 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 18:46:47,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:47,150 INFO L225 Difference]: With dead ends: 77 [2020-04-17 18:46:47,150 INFO L226 Difference]: Without dead ends: 69 [2020-04-17 18:46:47,151 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:46:47,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-04-17 18:46:47,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-04-17 18:46:47,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 18:46:47,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-04-17 18:46:47,154 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-04-17 18:46:47,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:47,154 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-04-17 18:46:47,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:47,155 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-04-17 18:46:47,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:47,155 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:47,155 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:47,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:47,358 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:47,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:47,359 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-04-17 18:46:47,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:47,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920996482] [2020-04-17 18:46:47,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:47,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920996482] [2020-04-17 18:46:47,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551033414] [2020-04-17 18:46:47,451 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:47,503 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:47,504 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:47,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:47,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 18:46:47,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822423576] [2020-04-17 18:46:47,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:47,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:47,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:47,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:47,521 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-04-17 18:46:47,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:47,732 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-04-17 18:46:47,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:46:47,733 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 18:46:47,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:47,734 INFO L225 Difference]: With dead ends: 84 [2020-04-17 18:46:47,734 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 18:46:47,735 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:46:47,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 18:46:47,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-04-17 18:46:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 18:46:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 18:46:47,739 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 18:46:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:47,739 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 18:46:47,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:47,740 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 18:46:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:47,740 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:47,740 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:47,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:47,944 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:47,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:47,945 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-04-17 18:46:47,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:47,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151588694] [2020-04-17 18:46:47,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:48,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151588694] [2020-04-17 18:46:48,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677923489] [2020-04-17 18:46:48,058 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:48,104 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:48,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:48,105 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:48,106 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:48,121 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:48,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:48,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 18:46:48,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076563124] [2020-04-17 18:46:48,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:48,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:48,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:48,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:48,130 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 18:46:48,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:48,382 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-04-17 18:46:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:46:48,383 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 18:46:48,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:48,384 INFO L225 Difference]: With dead ends: 81 [2020-04-17 18:46:48,384 INFO L226 Difference]: Without dead ends: 75 [2020-04-17 18:46:48,385 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:46:48,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-17 18:46:48,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-04-17 18:46:48,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 18:46:48,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 18:46:48,388 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 18:46:48,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:48,388 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 18:46:48,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:48,388 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 18:46:48,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:48,389 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:48,389 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:48,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:48,592 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:48,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:48,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-04-17 18:46:48,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:48,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551186801] [2020-04-17 18:46:48,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:48,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551186801] [2020-04-17 18:46:48,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772893911] [2020-04-17 18:46:48,682 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:48,726 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:46:48,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:48,727 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:48,728 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:48,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:48,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 18:46:48,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350421493] [2020-04-17 18:46:48,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:48,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:48,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:48,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:48,738 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 18:46:48,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:48,953 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-04-17 18:46:48,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:46:48,954 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 18:46:48,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:48,955 INFO L225 Difference]: With dead ends: 78 [2020-04-17 18:46:48,955 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 18:46:48,956 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:46:48,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 18:46:48,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-04-17 18:46:48,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 18:46:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 18:46:48,960 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 18:46:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:48,960 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 18:46:48,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 18:46:48,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:48,961 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:48,961 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:49,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:49,164 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:49,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:49,164 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-04-17 18:46:49,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:49,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451742600] [2020-04-17 18:46:49,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:49,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451742600] [2020-04-17 18:46:49,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086767605] [2020-04-17 18:46:49,256 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:49,308 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:49,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:49,309 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:49,310 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:49,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:49,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:49,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 18:46:49,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859857538] [2020-04-17 18:46:49,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:49,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:49,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:49,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:49,361 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 18:46:49,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:49,656 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-04-17 18:46:49,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:46:49,657 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 18:46:49,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:49,658 INFO L225 Difference]: With dead ends: 77 [2020-04-17 18:46:49,658 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 18:46:49,659 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:46:49,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 18:46:49,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-04-17 18:46:49,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 18:46:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 18:46:49,661 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 18:46:49,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:49,661 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 18:46:49,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:49,662 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 18:46:49,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:49,662 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:49,662 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:49,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:49,865 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:49,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:49,866 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-04-17 18:46:49,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:49,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934782362] [2020-04-17 18:46:49,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:49,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934782362] [2020-04-17 18:46:49,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40072073] [2020-04-17 18:46:49,952 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:50,002 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 18:46:50,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:50,003 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:50,003 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:50,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:50,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:50,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 18:46:50,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623550170] [2020-04-17 18:46:50,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:50,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:50,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:50,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:50,021 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 18:46:50,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:50,250 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-04-17 18:46:50,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:46:50,250 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 18:46:50,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:50,251 INFO L225 Difference]: With dead ends: 74 [2020-04-17 18:46:50,251 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 18:46:50,252 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:46:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 18:46:50,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-04-17 18:46:50,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 18:46:50,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 18:46:50,255 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 18:46:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:50,255 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 18:46:50,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 18:46:50,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:50,255 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:50,255 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:50,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:50,459 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:50,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:50,459 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-04-17 18:46:50,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:50,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159170892] [2020-04-17 18:46:50,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:50,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159170892] [2020-04-17 18:46:50,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697694739] [2020-04-17 18:46:50,540 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:50,585 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 18:46:50,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:50,586 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:46:50,587 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:50,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:50,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 18:46:50,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858627788] [2020-04-17 18:46:50,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:50,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:50,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:50,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:50,626 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 18:46:50,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:50,937 INFO L93 Difference]: Finished difference Result 71 states and 169 transitions. [2020-04-17 18:46:50,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:46:50,937 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 18:46:50,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:50,938 INFO L225 Difference]: With dead ends: 71 [2020-04-17 18:46:50,938 INFO L226 Difference]: Without dead ends: 65 [2020-04-17 18:46:50,939 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:46:50,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-04-17 18:46:50,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2020-04-17 18:46:50,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 18:46:50,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 18:46:50,941 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 18:46:50,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:50,941 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 18:46:50,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:50,942 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 18:46:50,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:50,942 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:50,942 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:51,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:51,143 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:51,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:51,144 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-04-17 18:46:51,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:51,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952915418] [2020-04-17 18:46:51,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:51,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952915418] [2020-04-17 18:46:51,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691882341] [2020-04-17 18:46:51,229 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:51,308 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:51,309 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:51,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:51,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:51,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 18:46:51,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414937324] [2020-04-17 18:46:51,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:51,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:51,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:51,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:51,341 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 18:46:51,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:51,764 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-04-17 18:46:51,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:46:51,765 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 18:46:51,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:51,766 INFO L225 Difference]: With dead ends: 89 [2020-04-17 18:46:51,766 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 18:46:51,767 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:46:51,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 18:46:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-04-17 18:46:51,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-17 18:46:51,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-04-17 18:46:51,770 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-04-17 18:46:51,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:51,770 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-04-17 18:46:51,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:51,770 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-04-17 18:46:51,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:51,770 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:51,771 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:51,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:51,974 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:51,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:51,974 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-04-17 18:46:51,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:51,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111215285] [2020-04-17 18:46:51,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:52,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111215285] [2020-04-17 18:46:52,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363143577] [2020-04-17 18:46:52,057 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:52,110 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:52,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:52,111 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:52,112 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:52,133 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:52,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:52,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 18:46:52,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061538554] [2020-04-17 18:46:52,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:52,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:52,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:52,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:52,144 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-04-17 18:46:52,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:52,555 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-04-17 18:46:52,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:46:52,555 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 18:46:52,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:52,556 INFO L225 Difference]: With dead ends: 70 [2020-04-17 18:46:52,556 INFO L226 Difference]: Without dead ends: 62 [2020-04-17 18:46:52,557 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:46:52,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-17 18:46:52,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-04-17 18:46:52,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-04-17 18:46:52,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-04-17 18:46:52,560 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-04-17 18:46:52,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:52,560 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-04-17 18:46:52,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:52,560 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-04-17 18:46:52,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:52,561 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:52,561 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:52,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:52,764 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:52,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:52,765 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-04-17 18:46:52,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:52,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504413830] [2020-04-17 18:46:52,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:52,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504413830] [2020-04-17 18:46:52,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651964476] [2020-04-17 18:46:52,846 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:52,896 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:46:52,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:52,897 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:52,897 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:52,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:52,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:52,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 18:46:52,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861172453] [2020-04-17 18:46:52,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:52,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:52,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:52,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:52,919 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-04-17 18:46:53,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:53,290 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-04-17 18:46:53,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:46:53,291 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 18:46:53,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:53,291 INFO L225 Difference]: With dead ends: 76 [2020-04-17 18:46:53,292 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 18:46:53,292 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:46:53,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 18:46:53,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-04-17 18:46:53,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 18:46:53,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-04-17 18:46:53,295 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-04-17 18:46:53,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:53,295 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-04-17 18:46:53,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:53,295 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-04-17 18:46:53,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:53,296 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:53,296 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:53,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:53,500 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:53,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:53,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-04-17 18:46:53,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:53,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604085475] [2020-04-17 18:46:53,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:53,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604085475] [2020-04-17 18:46:53,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431712035] [2020-04-17 18:46:53,584 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:53,635 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:53,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:53,636 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:53,637 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:53,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:53,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:53,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 18:46:53,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157493288] [2020-04-17 18:46:53,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:46:53,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:53,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:46:53,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:46:53,672 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-04-17 18:46:54,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:54,078 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-04-17 18:46:54,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:46:54,078 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 18:46:54,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:54,079 INFO L225 Difference]: With dead ends: 66 [2020-04-17 18:46:54,079 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 18:46:54,080 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:46:54,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 18:46:54,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-04-17 18:46:54,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 18:46:54,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-04-17 18:46:54,082 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-04-17 18:46:54,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:54,083 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-04-17 18:46:54,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:46:54,083 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-04-17 18:46:54,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:54,083 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:54,083 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:54,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:54,287 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:54,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:54,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-04-17 18:46:54,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:54,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387282808] [2020-04-17 18:46:54,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:54,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387282808] [2020-04-17 18:46:54,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518850952] [2020-04-17 18:46:54,398 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:54,447 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 18:46:54,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:54,448 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:54,449 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:54,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:54,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 18:46:54,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662498089] [2020-04-17 18:46:54,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:54,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:54,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:54,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:54,458 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-04-17 18:46:54,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:54,655 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-04-17 18:46:54,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:46:54,656 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 18:46:54,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:54,656 INFO L225 Difference]: With dead ends: 72 [2020-04-17 18:46:54,657 INFO L226 Difference]: Without dead ends: 66 [2020-04-17 18:46:54,657 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:46:54,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-04-17 18:46:54,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-04-17 18:46:54,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 18:46:54,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-04-17 18:46:54,660 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-04-17 18:46:54,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:54,660 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-04-17 18:46:54,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:54,660 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-04-17 18:46:54,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:54,660 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:54,661 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:54,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:54,864 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:54,864 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-04-17 18:46:54,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:54,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584967697] [2020-04-17 18:46:54,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:54,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584967697] [2020-04-17 18:46:54,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194898912] [2020-04-17 18:46:54,977 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:55,020 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 18:46:55,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:55,021 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:55,022 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:55,040 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:55,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:55,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 18:46:55,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328441842] [2020-04-17 18:46:55,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:46:55,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:55,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:46:55,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:46:55,049 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-04-17 18:46:55,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:55,247 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-04-17 18:46:55,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:46:55,248 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 18:46:55,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:55,249 INFO L225 Difference]: With dead ends: 82 [2020-04-17 18:46:55,249 INFO L226 Difference]: Without dead ends: 76 [2020-04-17 18:46:55,249 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:46:55,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-04-17 18:46:55,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-04-17 18:46:55,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 18:46:55,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-04-17 18:46:55,252 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-04-17 18:46:55,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:55,253 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-04-17 18:46:55,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:46:55,253 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-04-17 18:46:55,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:55,253 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:55,253 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:55,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:55,454 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:55,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:55,455 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-04-17 18:46:55,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:55,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438918808] [2020-04-17 18:46:55,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:55,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438918808] [2020-04-17 18:46:55,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230946749] [2020-04-17 18:46:55,591 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:55,637 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:55,638 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:55,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:55,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 18:46:55,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859294109] [2020-04-17 18:46:55,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:55,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:55,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:55,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:55,649 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-04-17 18:46:55,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:55,911 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-04-17 18:46:55,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:46:55,912 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 18:46:55,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:55,912 INFO L225 Difference]: With dead ends: 83 [2020-04-17 18:46:55,912 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 18:46:55,913 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:46:55,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 18:46:55,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-04-17 18:46:55,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 18:46:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-04-17 18:46:55,915 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-04-17 18:46:55,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:55,916 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-04-17 18:46:55,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:55,916 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-04-17 18:46:55,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:55,916 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:55,916 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:56,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:56,120 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:56,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:56,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-04-17 18:46:56,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:56,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839783460] [2020-04-17 18:46:56,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:56,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839783460] [2020-04-17 18:46:56,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615513330] [2020-04-17 18:46:56,230 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:56,275 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:56,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:56,276 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:56,277 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:56,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:56,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:56,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 18:46:56,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433061313] [2020-04-17 18:46:56,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:46:56,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:56,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:46:56,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:46:56,299 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-04-17 18:46:56,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:56,587 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-04-17 18:46:56,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:46:56,591 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 18:46:56,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:56,591 INFO L225 Difference]: With dead ends: 89 [2020-04-17 18:46:56,592 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 18:46:56,592 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:46:56,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 18:46:56,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-04-17 18:46:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 18:46:56,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-04-17 18:46:56,594 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-04-17 18:46:56,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:56,594 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-04-17 18:46:56,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:46:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-04-17 18:46:56,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:56,595 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:56,595 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:56,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:56,797 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:56,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:56,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-04-17 18:46:56,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:56,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617873010] [2020-04-17 18:46:56,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:56,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617873010] [2020-04-17 18:46:56,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890233946] [2020-04-17 18:46:56,888 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:56,937 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 18:46:56,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:56,938 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:56,939 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:56,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:56,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 18:46:56,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221134226] [2020-04-17 18:46:56,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:56,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:56,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:56,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:56,957 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-04-17 18:46:57,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:57,243 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-04-17 18:46:57,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:46:57,243 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 18:46:57,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:57,244 INFO L225 Difference]: With dead ends: 89 [2020-04-17 18:46:57,244 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 18:46:57,245 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:46:57,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 18:46:57,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-04-17 18:46:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 18:46:57,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 18:46:57,248 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-04-17 18:46:57,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:57,248 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 18:46:57,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:57,248 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 18:46:57,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:57,248 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:57,248 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:57,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:57,452 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:57,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:57,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-04-17 18:46:57,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:57,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821332667] [2020-04-17 18:46:57,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:57,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821332667] [2020-04-17 18:46:57,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054116934] [2020-04-17 18:46:57,546 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:57,591 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:57,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:57,592 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:57,593 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:57,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:57,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:57,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 18:46:57,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873946714] [2020-04-17 18:46:57,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:46:57,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:57,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:46:57,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:46:57,619 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-04-17 18:46:57,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:57,953 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-04-17 18:46:57,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:46:57,954 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 18:46:57,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:57,955 INFO L225 Difference]: With dead ends: 86 [2020-04-17 18:46:57,955 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 18:46:57,955 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:46:57,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 18:46:57,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-04-17 18:46:57,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 18:46:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 18:46:57,958 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-04-17 18:46:57,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:57,959 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 18:46:57,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:46:57,959 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 18:46:57,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:57,959 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:57,959 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:58,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:58,160 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:58,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:58,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-04-17 18:46:58,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:58,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120269813] [2020-04-17 18:46:58,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:58,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120269813] [2020-04-17 18:46:58,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742305394] [2020-04-17 18:46:58,259 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:58,304 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 18:46:58,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:58,305 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:58,306 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:58,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:58,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 18:46:58,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053077017] [2020-04-17 18:46:58,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:58,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:58,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:58,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:58,319 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-04-17 18:46:58,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:58,622 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-04-17 18:46:58,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:46:58,622 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 18:46:58,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:58,623 INFO L225 Difference]: With dead ends: 87 [2020-04-17 18:46:58,624 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 18:46:58,624 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:46:58,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 18:46:58,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-04-17 18:46:58,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-04-17 18:46:58,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-04-17 18:46:58,628 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-04-17 18:46:58,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:58,628 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-04-17 18:46:58,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:58,629 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-04-17 18:46:58,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:58,629 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:58,629 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:58,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:58,833 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:58,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:58,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-04-17 18:46:58,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:58,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722753957] [2020-04-17 18:46:58,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:58,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722753957] [2020-04-17 18:46:58,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415353398] [2020-04-17 18:46:58,916 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:58,966 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 18:46:58,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:58,967 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:58,968 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:58,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:58,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:58,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 18:46:58,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068664480] [2020-04-17 18:46:58,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:46:58,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:58,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:46:58,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:46:58,999 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-04-17 18:46:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:59,404 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-04-17 18:46:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:46:59,405 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 18:46:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:59,405 INFO L225 Difference]: With dead ends: 84 [2020-04-17 18:46:59,406 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 18:46:59,406 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:46:59,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 18:46:59,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-04-17 18:46:59,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 18:46:59,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-04-17 18:46:59,409 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-04-17 18:46:59,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:59,409 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-04-17 18:46:59,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:46:59,410 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-04-17 18:46:59,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:59,410 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:59,410 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:59,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:59,614 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:59,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:59,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-04-17 18:46:59,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:59,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725571664] [2020-04-17 18:46:59,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:59,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725571664] [2020-04-17 18:46:59,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240237144] [2020-04-17 18:46:59,727 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:59,775 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:59,776 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:59,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:59,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 18:46:59,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672312589] [2020-04-17 18:46:59,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:59,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:59,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:59,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:59,789 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-04-17 18:47:00,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:00,151 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-04-17 18:47:00,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:47:00,151 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 18:47:00,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:00,152 INFO L225 Difference]: With dead ends: 104 [2020-04-17 18:47:00,153 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 18:47:00,153 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-04-17 18:47:00,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 18:47:00,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-04-17 18:47:00,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 18:47:00,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-04-17 18:47:00,157 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-04-17 18:47:00,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:00,157 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-04-17 18:47:00,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:47:00,157 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-04-17 18:47:00,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:47:00,158 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:00,158 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:00,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:00,361 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:00,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:00,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-04-17 18:47:00,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:00,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810434985] [2020-04-17 18:47:00,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:00,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810434985] [2020-04-17 18:47:00,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283045665] [2020-04-17 18:47:00,455 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:00,504 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:47:00,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:00,505 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:47:00,506 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:00,537 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:00,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:00,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 18:47:00,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967040254] [2020-04-17 18:47:00,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:47:00,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:00,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:47:00,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:47:00,547 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-04-17 18:47:00,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:00,991 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-04-17 18:47:00,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:47:00,991 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 18:47:00,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:00,992 INFO L225 Difference]: With dead ends: 85 [2020-04-17 18:47:00,993 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 18:47:00,993 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 18:47:00,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 18:47:00,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-04-17 18:47:00,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-17 18:47:00,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-04-17 18:47:00,996 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-04-17 18:47:00,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:00,997 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-04-17 18:47:00,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:47:00,997 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-04-17 18:47:00,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:47:00,997 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:00,997 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:01,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:01,201 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:01,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:01,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-04-17 18:47:01,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:01,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224642405] [2020-04-17 18:47:01,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:47:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:47:01,257 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 18:47:01,258 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 18:47:01,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 06:47:01 BasicIcfg [2020-04-17 18:47:01,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 18:47:01,331 INFO L168 Benchmark]: Toolchain (without parser) took 37493.87 ms. Allocated memory was 138.4 MB in the beginning and 416.3 MB in the end (delta: 277.9 MB). Free memory was 100.2 MB in the beginning and 280.9 MB in the end (delta: -180.6 MB). Peak memory consumption was 97.2 MB. Max. memory is 7.1 GB. [2020-04-17 18:47:01,332 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-04-17 18:47:01,332 INFO L168 Benchmark]: CACSL2BoogieTranslator took 641.43 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 98.3 MB in the beginning and 162.5 MB in the end (delta: -64.2 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-04-17 18:47:01,332 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.66 ms. Allocated memory is still 202.9 MB. Free memory was 161.9 MB in the beginning and 159.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-17 18:47:01,333 INFO L168 Benchmark]: Boogie Preprocessor took 29.38 ms. Allocated memory is still 202.9 MB. Free memory was 159.9 MB in the beginning and 158.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-04-17 18:47:01,333 INFO L168 Benchmark]: RCFGBuilder took 437.82 ms. Allocated memory is still 202.9 MB. Free memory was 158.5 MB in the beginning and 138.3 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-04-17 18:47:01,334 INFO L168 Benchmark]: TraceAbstraction took 36312.49 ms. Allocated memory was 202.9 MB in the beginning and 416.3 MB in the end (delta: 213.4 MB). Free memory was 138.3 MB in the beginning and 280.9 MB in the end (delta: -142.5 MB). Peak memory consumption was 70.9 MB. Max. memory is 7.1 GB. [2020-04-17 18:47:01,340 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 641.43 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 98.3 MB in the beginning and 162.5 MB in the end (delta: -64.2 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.66 ms. Allocated memory is still 202.9 MB. Free memory was 161.9 MB in the beginning and 159.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.38 ms. Allocated memory is still 202.9 MB. Free memory was 159.9 MB in the beginning and 158.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 437.82 ms. Allocated memory is still 202.9 MB. Free memory was 158.5 MB in the beginning and 138.3 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 36312.49 ms. Allocated memory was 202.9 MB in the beginning and 416.3 MB in the end (delta: 213.4 MB). Free memory was 138.3 MB in the beginning and 280.9 MB in the end (delta: -142.5 MB). Peak memory consumption was 70.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.5s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L697] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L700] 0 int condJ = j >= (2*5 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 36.1s, OverallIterations: 59, TraceHistogramMax: 5, AutomataDifference: 13.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 891 SDtfs, 2353 SDslu, 3543 SDs, 0 SdLazy, 3822 SolverSat, 1602 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1774 GetRequests, 634 SyntacticMatches, 53 SemanticMatches, 1087 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4697 ImplicationChecksByTransitivity, 12.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 58 MinimizatonAttempts, 948 StatesRemovedByMinimization, 57 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 1602 NumberOfCodeBlocks, 1602 NumberOfCodeBlocksAsserted, 196 NumberOfCheckSat, 1473 ConstructedInterpolants, 0 QuantifiedInterpolants, 86797 SizeOfPredicates, 348 NumberOfNonLiveVariables, 5122 ConjunctsInSsa, 567 ConjunctsInUnsatCore, 111 InterpolantComputations, 5 PerfectInterpolantSequences, 0/900 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...