/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 10:51:20,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 10:51:20,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 10:51:20,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 10:51:20,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 10:51:20,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 10:51:20,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 10:51:20,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 10:51:20,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 10:51:20,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 10:51:20,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 10:51:20,653 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 10:51:20,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 10:51:20,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 10:51:20,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 10:51:20,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 10:51:20,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 10:51:20,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 10:51:20,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 10:51:20,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 10:51:20,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 10:51:20,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 10:51:20,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 10:51:20,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 10:51:20,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 10:51:20,688 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 10:51:20,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 10:51:20,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 10:51:20,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 10:51:20,697 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 10:51:20,697 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 10:51:20,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 10:51:20,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 10:51:20,703 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 10:51:20,704 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 10:51:20,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 10:51:20,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 10:51:20,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 10:51:20,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 10:51:20,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 10:51:20,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 10:51:20,708 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-16 10:51:20,748 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 10:51:20,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 10:51:20,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 10:51:20,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 10:51:20,751 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 10:51:20,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 10:51:20,751 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 10:51:20,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 10:51:20,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 10:51:20,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 10:51:20,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 10:51:20,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 10:51:20,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 10:51:20,754 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 10:51:20,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 10:51:20,754 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 10:51:20,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 10:51:20,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 10:51:20,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 10:51:20,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 10:51:20,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 10:51:20,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 10:51:20,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 10:51:20,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 10:51:20,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 10:51:20,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 10:51:20,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 10:51:20,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 10:51:20,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-16 10:51:20,757 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 10:51:21,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 10:51:21,125 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 10:51:21,129 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 10:51:21,131 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 10:51:21,131 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 10:51:21,132 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-16 10:51:21,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bd29a1245/8380a2ba001a417a88be528efc6d0c0c/FLAGc9f5c9610 [2020-10-16 10:51:21,732 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 10:51:21,733 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-16 10:51:21,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bd29a1245/8380a2ba001a417a88be528efc6d0c0c/FLAGc9f5c9610 [2020-10-16 10:51:22,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bd29a1245/8380a2ba001a417a88be528efc6d0c0c [2020-10-16 10:51:22,078 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 10:51:22,080 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 10:51:22,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 10:51:22,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 10:51:22,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 10:51:22,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75f8d541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22, skipping insertion in model container [2020-10-16 10:51:22,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 10:51:22,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 10:51:22,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 10:51:22,614 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 10:51:22,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 10:51:22,757 INFO L208 MainTranslator]: Completed translation [2020-10-16 10:51:22,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22 WrapperNode [2020-10-16 10:51:22,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 10:51:22,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 10:51:22,761 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 10:51:22,761 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 10:51:22,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 10:51:22,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 10:51:22,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 10:51:22,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 10:51:22,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 10:51:22,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 10:51:22,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 10:51:22,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 10:51:22,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 10:51:22,958 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 10:51:22,958 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 10:51:22,958 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 10:51:22,958 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 10:51:22,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 10:51:22,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 10:51:22,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 10:51:22,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 10:51:22,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 10:51:22,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 10:51:22,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 10:51:22,962 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 10:51:23,341 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 10:51:23,342 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 10:51:23,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 10:51:23 BoogieIcfgContainer [2020-10-16 10:51:23,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 10:51:23,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 10:51:23,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 10:51:23,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 10:51:23,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 10:51:22" (1/3) ... [2020-10-16 10:51:23,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf6e38e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 10:51:23, skipping insertion in model container [2020-10-16 10:51:23,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (2/3) ... [2020-10-16 10:51:23,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf6e38e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 10:51:23, skipping insertion in model container [2020-10-16 10:51:23,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 10:51:23" (3/3) ... [2020-10-16 10:51:23,354 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-10-16 10:51:23,368 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 10:51:23,368 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 10:51:23,375 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 10:51:23,376 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 10:51:23,406 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,407 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,407 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,407 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,408 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,408 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,408 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,408 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,409 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,409 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,409 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,409 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,409 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,410 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,410 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,410 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,411 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,411 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,411 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,411 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,412 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,413 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,414 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,414 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,415 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,415 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,422 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,422 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,422 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,423 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,423 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,423 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,428 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,429 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,429 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,429 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,429 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,429 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:23,432 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 10:51:23,446 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 10:51:23,467 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 10:51:23,467 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 10:51:23,467 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 10:51:23,467 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 10:51:23,467 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 10:51:23,468 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 10:51:23,468 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 10:51:23,468 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 10:51:23,479 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 10:51:23,482 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 10:51:23,484 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 10:51:23,486 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 10:51:23,524 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 10:51:23,524 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 10:51:23,530 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-16 10:51:23,533 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-16 10:51:24,534 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-16 10:51:24,766 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-16 10:51:24,766 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-16 10:51:24,773 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-16 10:51:24,784 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-16 10:51:24,786 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-16 10:51:24,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-16 10:51:24,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:24,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 10:51:24,794 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:24,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:24,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-16 10:51:24,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:24,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142768789] [2020-10-16 10:51:24,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:25,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142768789] [2020-10-16 10:51:25,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:51:25,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 10:51:25,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902711963] [2020-10-16 10:51:25,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 10:51:25,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:25,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 10:51:25,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 10:51:25,079 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-16 10:51:25,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:25,150 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-16 10:51:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 10:51:25,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-16 10:51:25,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:25,164 INFO L225 Difference]: With dead ends: 75 [2020-10-16 10:51:25,164 INFO L226 Difference]: Without dead ends: 42 [2020-10-16 10:51:25,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 10:51:25,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-16 10:51:25,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-16 10:51:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 10:51:25,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-16 10:51:25,203 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-16 10:51:25,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:25,204 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-16 10:51:25,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 10:51:25,204 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-16 10:51:25,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 10:51:25,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:25,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:25,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 10:51:25,206 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:25,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:25,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-16 10:51:25,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:25,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760002618] [2020-10-16 10:51:25,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:25,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760002618] [2020-10-16 10:51:25,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:51:25,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 10:51:25,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677035518] [2020-10-16 10:51:25,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 10:51:25,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:25,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 10:51:25,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 10:51:25,288 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-16 10:51:25,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:25,323 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-16 10:51:25,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 10:51:25,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 10:51:25,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:25,325 INFO L225 Difference]: With dead ends: 56 [2020-10-16 10:51:25,325 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 10:51:25,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:51:25,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 10:51:25,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-16 10:51:25,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 10:51:25,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-16 10:51:25,333 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-16 10:51:25,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:25,334 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-16 10:51:25,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 10:51:25,335 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-16 10:51:25,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:51:25,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:25,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:25,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 10:51:25,336 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:25,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:25,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-16 10:51:25,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:25,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100768272] [2020-10-16 10:51:25,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:25,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100768272] [2020-10-16 10:51:25,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:51:25,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:51:25,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389685927] [2020-10-16 10:51:25,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:51:25,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:25,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:51:25,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:51:25,428 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-16 10:51:25,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:25,534 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-16 10:51:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:51:25,537 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:51:25,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:25,539 INFO L225 Difference]: With dead ends: 78 [2020-10-16 10:51:25,539 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 10:51:25,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:25,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 10:51:25,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-16 10:51:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 10:51:25,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 10:51:25,558 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-16 10:51:25,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:25,558 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 10:51:25,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:51:25,559 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 10:51:25,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:51:25,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:25,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:25,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 10:51:25,564 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:25,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:25,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-16 10:51:25,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:25,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657353164] [2020-10-16 10:51:25,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:25,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657353164] [2020-10-16 10:51:25,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:51:25,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:51:25,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212327983] [2020-10-16 10:51:25,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:51:25,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:25,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:51:25,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:51:25,665 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-16 10:51:25,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:25,728 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-16 10:51:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:51:25,729 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:51:25,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:25,729 INFO L225 Difference]: With dead ends: 54 [2020-10-16 10:51:25,730 INFO L226 Difference]: Without dead ends: 43 [2020-10-16 10:51:25,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:25,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-16 10:51:25,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-16 10:51:25,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 10:51:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-16 10:51:25,735 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-16 10:51:25,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:25,736 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-16 10:51:25,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:51:25,736 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-16 10:51:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:51:25,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:25,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:25,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 10:51:25,737 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:25,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:25,738 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-16 10:51:25,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:25,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481887637] [2020-10-16 10:51:25,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:25,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481887637] [2020-10-16 10:51:25,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:51:25,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:51:25,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716010323] [2020-10-16 10:51:25,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:51:25,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:25,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:51:25,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:51:25,793 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-16 10:51:25,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:25,872 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-16 10:51:25,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:51:25,873 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:51:25,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:25,874 INFO L225 Difference]: With dead ends: 57 [2020-10-16 10:51:25,874 INFO L226 Difference]: Without dead ends: 51 [2020-10-16 10:51:25,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:25,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-16 10:51:25,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-16 10:51:25,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 10:51:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-16 10:51:25,884 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-16 10:51:25,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:25,884 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-16 10:51:25,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:51:25,885 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-16 10:51:25,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:51:25,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:25,885 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:25,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 10:51:25,886 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:25,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:25,886 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-16 10:51:25,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:25,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537176992] [2020-10-16 10:51:25,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:25,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:25,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537176992] [2020-10-16 10:51:25,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244632353] [2020-10-16 10:51:25,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:26,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:26,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:26,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:51:26,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:26,109 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:26,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:26,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 10:51:26,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790263428] [2020-10-16 10:51:26,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:51:26,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:26,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:51:26,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-16 10:51:26,128 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-16 10:51:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:26,230 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-16 10:51:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:51:26,230 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 10:51:26,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:26,231 INFO L225 Difference]: With dead ends: 48 [2020-10-16 10:51:26,232 INFO L226 Difference]: Without dead ends: 43 [2020-10-16 10:51:26,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:26,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-16 10:51:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-16 10:51:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 10:51:26,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-16 10:51:26,237 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-16 10:51:26,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:26,237 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-16 10:51:26,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:51:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-16 10:51:26,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:51:26,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:26,239 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:26,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 10:51:26,450 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:26,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:26,451 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-16 10:51:26,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:26,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386002560] [2020-10-16 10:51:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:26,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386002560] [2020-10-16 10:51:26,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940000380] [2020-10-16 10:51:26,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:26,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:26,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:26,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:51:26,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:26,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:26,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 10:51:26,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583041099] [2020-10-16 10:51:26,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 10:51:26,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:26,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 10:51:26,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-16 10:51:26,595 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-16 10:51:26,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:26,658 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-16 10:51:26,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:51:26,659 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-16 10:51:26,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:26,660 INFO L225 Difference]: With dead ends: 54 [2020-10-16 10:51:26,660 INFO L226 Difference]: Without dead ends: 48 [2020-10-16 10:51:26,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:26,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-16 10:51:26,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-16 10:51:26,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 10:51:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-16 10:51:26,666 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-16 10:51:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:26,666 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-16 10:51:26,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 10:51:26,667 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-16 10:51:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:51:26,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:26,668 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:26,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:26,869 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:26,870 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-16 10:51:26,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:26,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447254913] [2020-10-16 10:51:26,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:26,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:26,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447254913] [2020-10-16 10:51:26,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228548613] [2020-10-16 10:51:26,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:26,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:51:26,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:26,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:51:26,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:26,989 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:27,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:27,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:27,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 10:51:27,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942111005] [2020-10-16 10:51:27,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:51:27,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:27,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:51:27,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 10:51:27,004 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-16 10:51:27,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:27,113 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-16 10:51:27,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:51:27,114 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 10:51:27,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:27,115 INFO L225 Difference]: With dead ends: 58 [2020-10-16 10:51:27,115 INFO L226 Difference]: Without dead ends: 52 [2020-10-16 10:51:27,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:27,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-16 10:51:27,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-16 10:51:27,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 10:51:27,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-16 10:51:27,120 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-16 10:51:27,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:27,121 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-16 10:51:27,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:51:27,121 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-16 10:51:27,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:51:27,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:27,122 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:27,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:27,323 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:27,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:27,324 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-16 10:51:27,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:27,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107375441] [2020-10-16 10:51:27,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:27,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107375441] [2020-10-16 10:51:27,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4807028] [2020-10-16 10:51:27,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:27,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:27,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:51:27,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:27,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:27,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 10:51:27,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921482050] [2020-10-16 10:51:27,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 10:51:27,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:27,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 10:51:27,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-16 10:51:27,506 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-16 10:51:27,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:27,673 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-16 10:51:27,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:51:27,676 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-16 10:51:27,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:27,677 INFO L225 Difference]: With dead ends: 78 [2020-10-16 10:51:27,678 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 10:51:27,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:27,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 10:51:27,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-16 10:51:27,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 10:51:27,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-16 10:51:27,690 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-16 10:51:27,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:27,690 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-16 10:51:27,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 10:51:27,691 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-16 10:51:27,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:51:27,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:27,692 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:27,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:27,905 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:27,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:27,906 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-16 10:51:27,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:27,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198417737] [2020-10-16 10:51:27,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:27,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198417737] [2020-10-16 10:51:27,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296725996] [2020-10-16 10:51:27,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:28,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:28,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:28,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:51:28,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:28,071 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:28,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:28,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 10:51:28,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716192661] [2020-10-16 10:51:28,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:51:28,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:28,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:51:28,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 10:51:28,082 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-16 10:51:28,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:28,246 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-16 10:51:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:51:28,247 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 10:51:28,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:28,248 INFO L225 Difference]: With dead ends: 62 [2020-10-16 10:51:28,248 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 10:51:28,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:51:28,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 10:51:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-16 10:51:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-16 10:51:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-16 10:51:28,252 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-16 10:51:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:28,253 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-16 10:51:28,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:51:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-16 10:51:28,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:51:28,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:28,254 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:28,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 10:51:28,466 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:28,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:28,466 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-16 10:51:28,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:28,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688705854] [2020-10-16 10:51:28,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:28,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688705854] [2020-10-16 10:51:28,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621956180] [2020-10-16 10:51:28,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:28,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:51:28,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:28,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:51:28,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:28,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:28,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 10:51:28,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065792955] [2020-10-16 10:51:28,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:51:28,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:28,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:51:28,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 10:51:28,604 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-16 10:51:28,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:28,713 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-16 10:51:28,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:51:28,714 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-16 10:51:28,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:28,716 INFO L225 Difference]: With dead ends: 64 [2020-10-16 10:51:28,716 INFO L226 Difference]: Without dead ends: 58 [2020-10-16 10:51:28,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:28,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-16 10:51:28,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-16 10:51:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 10:51:28,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-16 10:51:28,725 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-16 10:51:28,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:28,726 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-16 10:51:28,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:51:28,726 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-16 10:51:28,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:51:28,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:28,727 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:28,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:28,939 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:28,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:28,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-16 10:51:28,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:28,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203966474] [2020-10-16 10:51:28,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:29,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:29,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203966474] [2020-10-16 10:51:29,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991518275] [2020-10-16 10:51:29,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:29,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:29,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:29,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:51:29,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:29,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:29,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:29,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 10:51:29,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478096698] [2020-10-16 10:51:29,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:51:29,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:29,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:51:29,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:29,111 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-16 10:51:29,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:29,315 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-16 10:51:29,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:51:29,316 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 10:51:29,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:29,317 INFO L225 Difference]: With dead ends: 61 [2020-10-16 10:51:29,317 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 10:51:29,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:51:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 10:51:29,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-16 10:51:29,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 10:51:29,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-16 10:51:29,322 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-16 10:51:29,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:29,322 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-16 10:51:29,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:51:29,322 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-16 10:51:29,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:51:29,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:29,323 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:29,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:29,534 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:29,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:29,535 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-16 10:51:29,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:29,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138321953] [2020-10-16 10:51:29,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:29,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138321953] [2020-10-16 10:51:29,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938373521] [2020-10-16 10:51:29,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:29,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:29,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:29,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:51:29,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:29,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:29,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 10:51:29,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536479772] [2020-10-16 10:51:29,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:51:29,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:29,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:51:29,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 10:51:29,655 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-16 10:51:29,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:29,795 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-16 10:51:29,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:51:29,796 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-16 10:51:29,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:29,797 INFO L225 Difference]: With dead ends: 77 [2020-10-16 10:51:29,797 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 10:51:29,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:51:29,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 10:51:29,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-16 10:51:29,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 10:51:29,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-16 10:51:29,802 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-16 10:51:29,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:29,802 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-16 10:51:29,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:51:29,802 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-16 10:51:29,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:51:29,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:29,803 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:30,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 10:51:30,014 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:30,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:30,014 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-16 10:51:30,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:30,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333934919] [2020-10-16 10:51:30,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:30,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333934919] [2020-10-16 10:51:30,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376920753] [2020-10-16 10:51:30,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:30,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:51:30,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:30,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:51:30,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:30,135 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:30,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:30,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 10:51:30,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701892930] [2020-10-16 10:51:30,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:51:30,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:30,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:51:30,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:30,153 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-16 10:51:30,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:30,365 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-16 10:51:30,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:51:30,365 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 10:51:30,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:30,366 INFO L225 Difference]: With dead ends: 58 [2020-10-16 10:51:30,366 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 10:51:30,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:51:30,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 10:51:30,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-16 10:51:30,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 10:51:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-16 10:51:30,369 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-16 10:51:30,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:30,369 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-16 10:51:30,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:51:30,370 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-16 10:51:30,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:51:30,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:30,370 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:30,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:30,580 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:30,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:30,581 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-16 10:51:30,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:30,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350526160] [2020-10-16 10:51:30,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:30,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350526160] [2020-10-16 10:51:30,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823989783] [2020-10-16 10:51:30,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:30,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:51:30,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:30,725 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:30,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:30,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 10:51:30,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102380743] [2020-10-16 10:51:30,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:51:30,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:30,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:51:30,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:30,743 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-16 10:51:30,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:30,910 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-16 10:51:30,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:51:30,910 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 10:51:30,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:30,911 INFO L225 Difference]: With dead ends: 60 [2020-10-16 10:51:30,911 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 10:51:30,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:51:30,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 10:51:30,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-16 10:51:30,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 10:51:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 10:51:30,918 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-16 10:51:30,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:30,918 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 10:51:30,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:51:30,918 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 10:51:30,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:30,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:30,919 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:31,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 10:51:31,122 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:31,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:31,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-16 10:51:31,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:31,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371992980] [2020-10-16 10:51:31,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:31,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371992980] [2020-10-16 10:51:31,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198983699] [2020-10-16 10:51:31,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:31,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:31,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:31,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:31,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:31,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:31,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:31,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 10:51:31,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597078606] [2020-10-16 10:51:31,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:31,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:31,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:31,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:31,281 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-16 10:51:31,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:31,471 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-16 10:51:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:51:31,472 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 10:51:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:31,473 INFO L225 Difference]: With dead ends: 54 [2020-10-16 10:51:31,473 INFO L226 Difference]: Without dead ends: 49 [2020-10-16 10:51:31,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:51:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-16 10:51:31,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-16 10:51:31,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-16 10:51:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-16 10:51:31,477 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-16 10:51:31,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:31,477 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-16 10:51:31,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-16 10:51:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:31,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:31,478 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:31,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 10:51:31,686 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:31,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:31,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-16 10:51:31,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:31,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497929136] [2020-10-16 10:51:31,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:31,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497929136] [2020-10-16 10:51:31,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135181134] [2020-10-16 10:51:31,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:31,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:51:31,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:31,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:31,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:31,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:31,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 10:51:31,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623725894] [2020-10-16 10:51:31,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:51:31,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:31,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:51:31,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:31,848 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-16 10:51:31,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:31,946 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-16 10:51:31,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:51:31,947 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 10:51:31,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:31,947 INFO L225 Difference]: With dead ends: 60 [2020-10-16 10:51:31,948 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 10:51:31,948 INFO L677 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 [2020-10-16 10:51:31,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 10:51:31,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-16 10:51:31,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 10:51:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-16 10:51:31,951 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-16 10:51:31,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:31,952 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-16 10:51:31,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:51:31,952 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-16 10:51:31,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:31,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:31,952 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:32,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 10:51:32,162 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:32,162 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-16 10:51:32,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:32,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225305046] [2020-10-16 10:51:32,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:32,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225305046] [2020-10-16 10:51:32,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941736664] [2020-10-16 10:51:32,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:32,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:32,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:32,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:32,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:32,309 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:32,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:32,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 10:51:32,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17662227] [2020-10-16 10:51:32,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:32,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:32,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:32,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:32,335 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-16 10:51:32,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:32,491 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-16 10:51:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:51:32,492 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 10:51:32,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:32,492 INFO L225 Difference]: With dead ends: 66 [2020-10-16 10:51:32,492 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 10:51:32,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:51:32,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 10:51:32,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-16 10:51:32,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 10:51:32,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-16 10:51:32,496 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-16 10:51:32,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:32,496 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-16 10:51:32,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:32,496 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-16 10:51:32,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:32,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:32,497 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:32,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 10:51:32,706 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:32,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:32,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-16 10:51:32,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:32,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257262177] [2020-10-16 10:51:32,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:32,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257262177] [2020-10-16 10:51:32,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597379987] [2020-10-16 10:51:32,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:32,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:51:32,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:32,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:32,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:32,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:32,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 10:51:32,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522826876] [2020-10-16 10:51:32,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:51:32,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:32,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:51:32,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:32,841 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-16 10:51:32,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:32,995 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-16 10:51:32,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:51:32,996 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 10:51:32,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:32,997 INFO L225 Difference]: With dead ends: 67 [2020-10-16 10:51:32,997 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 10:51:32,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:51:32,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 10:51:33,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-16 10:51:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-16 10:51:33,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-16 10:51:33,001 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-16 10:51:33,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:33,001 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-16 10:51:33,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:51:33,001 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-16 10:51:33,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:33,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:33,002 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:33,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:33,212 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:33,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:33,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-16 10:51:33,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:33,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87117861] [2020-10-16 10:51:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:33,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87117861] [2020-10-16 10:51:33,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144865484] [2020-10-16 10:51:33,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:33,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:51:33,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:33,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:33,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:33,339 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:33,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:33,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 10:51:33,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396873284] [2020-10-16 10:51:33,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:33,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:33,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:33,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:33,353 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-16 10:51:33,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:33,545 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-16 10:51:33,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:51:33,546 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 10:51:33,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:33,546 INFO L225 Difference]: With dead ends: 69 [2020-10-16 10:51:33,546 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 10:51:33,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:51:33,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 10:51:33,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-16 10:51:33,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 10:51:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 10:51:33,550 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-16 10:51:33,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:33,550 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 10:51:33,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:33,550 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 10:51:33,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:33,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:33,551 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:33,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:33,751 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:33,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:33,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-16 10:51:33,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:33,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687255514] [2020-10-16 10:51:33,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:33,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687255514] [2020-10-16 10:51:33,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887463597] [2020-10-16 10:51:33,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:33,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:33,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:33,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:33,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 10:51:33,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135479530] [2020-10-16 10:51:33,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:51:33,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:33,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:51:33,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:33,859 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-16 10:51:34,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:34,064 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-16 10:51:34,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:34,068 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 10:51:34,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:34,069 INFO L225 Difference]: With dead ends: 88 [2020-10-16 10:51:34,069 INFO L226 Difference]: Without dead ends: 82 [2020-10-16 10:51:34,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:51:34,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-16 10:51:34,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-16 10:51:34,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 10:51:34,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-16 10:51:34,073 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-16 10:51:34,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:34,073 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-16 10:51:34,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:51:34,073 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-16 10:51:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:34,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:34,074 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:34,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:34,281 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:34,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:34,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-16 10:51:34,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:34,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325029389] [2020-10-16 10:51:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:34,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325029389] [2020-10-16 10:51:34,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256499689] [2020-10-16 10:51:34,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:34,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:34,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:34,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:34,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:34,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:34,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 10:51:34,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429979807] [2020-10-16 10:51:34,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:34,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:34,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:34,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:34,419 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-16 10:51:34,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:34,682 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-16 10:51:34,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:51:34,682 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 10:51:34,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:34,683 INFO L225 Difference]: With dead ends: 69 [2020-10-16 10:51:34,683 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 10:51:34,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:51:34,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 10:51:34,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-16 10:51:34,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 10:51:34,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-16 10:51:34,687 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-16 10:51:34,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:34,687 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-16 10:51:34,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-16 10:51:34,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:34,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:34,690 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:34,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 10:51:34,900 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:34,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:34,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-16 10:51:34,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:34,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156044148] [2020-10-16 10:51:34,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:34,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156044148] [2020-10-16 10:51:34,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915267062] [2020-10-16 10:51:34,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:35,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:51:35,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:35,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:35,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:35,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:35,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 10:51:35,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759264812] [2020-10-16 10:51:35,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:35,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:35,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:35,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:35,034 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-16 10:51:35,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:35,167 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-16 10:51:35,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:51:35,168 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 10:51:35,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:35,169 INFO L225 Difference]: With dead ends: 74 [2020-10-16 10:51:35,169 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 10:51:35,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:51:35,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 10:51:35,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-16 10:51:35,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 10:51:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 10:51:35,172 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-16 10:51:35,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:35,172 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 10:51:35,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:35,172 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 10:51:35,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:35,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:35,173 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:35,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 10:51:35,374 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:35,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:35,374 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-16 10:51:35,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:35,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120440202] [2020-10-16 10:51:35,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:35,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120440202] [2020-10-16 10:51:35,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064934893] [2020-10-16 10:51:35,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:35,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:35,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:35,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:35,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:35,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:35,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:35,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 10:51:35,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939714801] [2020-10-16 10:51:35,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:35,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:35,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:35,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:35,530 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-16 10:51:35,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:35,738 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-16 10:51:35,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:51:35,739 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 10:51:35,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:35,740 INFO L225 Difference]: With dead ends: 71 [2020-10-16 10:51:35,740 INFO L226 Difference]: Without dead ends: 65 [2020-10-16 10:51:35,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:51:35,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-16 10:51:35,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-16 10:51:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 10:51:35,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 10:51:35,743 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-16 10:51:35,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:35,743 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 10:51:35,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:35,743 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 10:51:35,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:35,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:35,744 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:35,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 10:51:35,954 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:35,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:35,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-16 10:51:35,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:35,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770902814] [2020-10-16 10:51:35,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:36,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770902814] [2020-10-16 10:51:36,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380099165] [2020-10-16 10:51:36,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:36,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:51:36,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:36,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:36,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:36,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:36,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 10:51:36,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198093758] [2020-10-16 10:51:36,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:36,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:36,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:36,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:36,075 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-16 10:51:36,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:36,250 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-16 10:51:36,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:51:36,250 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 10:51:36,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:36,251 INFO L225 Difference]: With dead ends: 68 [2020-10-16 10:51:36,252 INFO L226 Difference]: Without dead ends: 62 [2020-10-16 10:51:36,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:51:36,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-16 10:51:36,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-16 10:51:36,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 10:51:36,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 10:51:36,256 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-16 10:51:36,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:36,256 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 10:51:36,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:36,256 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 10:51:36,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:36,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:36,257 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:36,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 10:51:36,462 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:36,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:36,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-16 10:51:36,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:36,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63109040] [2020-10-16 10:51:36,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:36,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63109040] [2020-10-16 10:51:36,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246722898] [2020-10-16 10:51:36,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:36,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:51:36,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:36,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:36,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:36,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:36,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:36,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 10:51:36,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896220385] [2020-10-16 10:51:36,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:36,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:36,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:36,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:36,622 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-16 10:51:36,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:36,892 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-16 10:51:36,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:51:36,893 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 10:51:36,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:36,894 INFO L225 Difference]: With dead ends: 67 [2020-10-16 10:51:36,894 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 10:51:36,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:51:36,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 10:51:36,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-16 10:51:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 10:51:36,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 10:51:36,897 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-16 10:51:36,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:36,898 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 10:51:36,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:36,898 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 10:51:36,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:36,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:36,899 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:37,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 10:51:37,109 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:37,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:37,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-16 10:51:37,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:37,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706882569] [2020-10-16 10:51:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:37,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706882569] [2020-10-16 10:51:37,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981912272] [2020-10-16 10:51:37,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:37,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:37,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:37,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:37,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 10:51:37,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588062825] [2020-10-16 10:51:37,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:37,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:37,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:37,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:37,244 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-16 10:51:37,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:37,459 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-16 10:51:37,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:37,459 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 10:51:37,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:37,460 INFO L225 Difference]: With dead ends: 83 [2020-10-16 10:51:37,460 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 10:51:37,461 INFO L677 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 [2020-10-16 10:51:37,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 10:51:37,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-16 10:51:37,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 10:51:37,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-16 10:51:37,464 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-16 10:51:37,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:37,464 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-16 10:51:37,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:37,464 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-16 10:51:37,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:37,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:37,465 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:37,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:37,673 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:37,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:37,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-16 10:51:37,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:37,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770816970] [2020-10-16 10:51:37,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:37,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770816970] [2020-10-16 10:51:37,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231613800] [2020-10-16 10:51:37,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:37,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:37,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:37,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:37,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:37,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:37,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:37,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 10:51:37,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756319894] [2020-10-16 10:51:37,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:37,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:37,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:37,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:37,812 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-16 10:51:38,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:38,103 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-16 10:51:38,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:51:38,103 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 10:51:38,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:38,104 INFO L225 Difference]: With dead ends: 64 [2020-10-16 10:51:38,104 INFO L226 Difference]: Without dead ends: 56 [2020-10-16 10:51:38,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:51:38,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-16 10:51:38,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-10-16 10:51:38,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-16 10:51:38,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-16 10:51:38,108 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-16 10:51:38,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:38,108 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-16 10:51:38,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:38,109 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-16 10:51:38,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:38,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:38,109 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:38,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 10:51:38,312 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:38,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:38,312 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-16 10:51:38,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:38,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683643286] [2020-10-16 10:51:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:38,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683643286] [2020-10-16 10:51:38,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521880008] [2020-10-16 10:51:38,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:38,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:51:38,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:38,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:38,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:38,464 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:38,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:38,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 10:51:38,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49508372] [2020-10-16 10:51:38,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:38,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:38,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:38,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:38,478 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-16 10:51:38,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:38,742 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-16 10:51:38,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:38,743 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 10:51:38,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:38,744 INFO L225 Difference]: With dead ends: 68 [2020-10-16 10:51:38,744 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 10:51:38,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:51:38,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 10:51:38,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-16 10:51:38,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 10:51:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-16 10:51:38,748 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-16 10:51:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:38,748 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-16 10:51:38,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:38,748 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-16 10:51:38,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:38,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:38,749 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:38,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 10:51:38,949 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:38,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:38,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-16 10:51:38,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:38,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940583050] [2020-10-16 10:51:38,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:39,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940583050] [2020-10-16 10:51:39,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639626648] [2020-10-16 10:51:39,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:39,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:39,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:39,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:39,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:39,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:39,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:39,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 10:51:39,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947154991] [2020-10-16 10:51:39,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:39,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:39,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:39,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:39,114 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-16 10:51:39,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:39,415 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-16 10:51:39,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:39,416 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 10:51:39,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:39,417 INFO L225 Difference]: With dead ends: 60 [2020-10-16 10:51:39,417 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 10:51:39,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:51:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 10:51:39,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-16 10:51:39,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 10:51:39,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-16 10:51:39,421 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-16 10:51:39,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:39,421 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-16 10:51:39,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:39,421 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-16 10:51:39,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:39,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:39,422 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:39,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:39,627 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:39,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:39,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-16 10:51:39,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:39,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363141925] [2020-10-16 10:51:39,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:39,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363141925] [2020-10-16 10:51:39,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607340717] [2020-10-16 10:51:39,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:39,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 10:51:39,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:39,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:39,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:39,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:39,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 10:51:39,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782084648] [2020-10-16 10:51:39,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:39,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:39,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:39,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:39,766 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-16 10:51:39,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:39,898 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-16 10:51:39,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:51:39,899 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 10:51:39,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:39,900 INFO L225 Difference]: With dead ends: 66 [2020-10-16 10:51:39,900 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 10:51:39,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:51:39,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 10:51:39,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-16 10:51:39,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 10:51:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-16 10:51:39,904 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-16 10:51:39,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:39,904 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-16 10:51:39,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:39,904 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-16 10:51:39,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:39,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:39,905 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:40,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:40,114 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:40,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:40,114 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-16 10:51:40,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:40,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501095490] [2020-10-16 10:51:40,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:40,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501095490] [2020-10-16 10:51:40,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477689013] [2020-10-16 10:51:40,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:40,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 10:51:40,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:40,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:40,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:40,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:40,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:40,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 10:51:40,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472610461] [2020-10-16 10:51:40,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:40,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:40,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:40,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:40,291 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-16 10:51:40,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:40,472 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-16 10:51:40,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:51:40,473 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 10:51:40,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:40,473 INFO L225 Difference]: With dead ends: 74 [2020-10-16 10:51:40,473 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 10:51:40,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:51:40,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 10:51:40,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-16 10:51:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 10:51:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-16 10:51:40,476 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-16 10:51:40,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:40,476 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-16 10:51:40,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:40,477 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-16 10:51:40,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:40,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:40,477 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:40,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 10:51:40,684 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:40,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:40,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-16 10:51:40,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:40,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180195437] [2020-10-16 10:51:40,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:40,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180195437] [2020-10-16 10:51:40,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039934520] [2020-10-16 10:51:40,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:40,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:40,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:40,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:40,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 10:51:40,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060773540] [2020-10-16 10:51:40,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:40,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:40,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:40,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:40,834 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-16 10:51:41,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:41,040 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-16 10:51:41,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:41,041 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 10:51:41,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:41,041 INFO L225 Difference]: With dead ends: 75 [2020-10-16 10:51:41,042 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 10:51:41,042 INFO L677 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 [2020-10-16 10:51:41,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 10:51:41,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-16 10:51:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 10:51:41,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 10:51:41,045 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-16 10:51:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:41,045 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 10:51:41,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:41,045 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 10:51:41,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:41,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:41,046 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:41,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:41,255 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:41,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:41,255 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-16 10:51:41,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:41,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658733265] [2020-10-16 10:51:41,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:41,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658733265] [2020-10-16 10:51:41,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661084315] [2020-10-16 10:51:41,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:41,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:41,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:41,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:41,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:41,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:41,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:41,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 10:51:41,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773304898] [2020-10-16 10:51:41,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:41,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:41,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:41,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:41,414 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-16 10:51:41,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:41,660 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-16 10:51:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:51:41,665 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 10:51:41,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:41,666 INFO L225 Difference]: With dead ends: 79 [2020-10-16 10:51:41,666 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 10:51:41,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:51:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 10:51:41,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-16 10:51:41,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 10:51:41,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 10:51:41,669 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-16 10:51:41,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:41,670 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 10:51:41,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:41,670 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 10:51:41,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:41,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:41,671 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:41,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 10:51:41,878 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:41,879 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-16 10:51:41,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:41,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662437840] [2020-10-16 10:51:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:41,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662437840] [2020-10-16 10:51:41,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302535372] [2020-10-16 10:51:41,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:42,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 10:51:42,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:42,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:42,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:42,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:42,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 10:51:42,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128587612] [2020-10-16 10:51:42,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:42,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:42,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:42,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:42,086 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-16 10:51:42,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:42,393 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-16 10:51:42,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:51:42,394 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 10:51:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:42,395 INFO L225 Difference]: With dead ends: 79 [2020-10-16 10:51:42,395 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 10:51:42,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:51:42,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 10:51:42,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-16 10:51:42,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 10:51:42,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-16 10:51:42,399 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-16 10:51:42,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:42,399 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-16 10:51:42,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:42,399 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-16 10:51:42,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:42,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:42,400 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:42,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:42,608 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:42,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:42,609 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-16 10:51:42,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:42,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815131375] [2020-10-16 10:51:42,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:42,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815131375] [2020-10-16 10:51:42,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949763128] [2020-10-16 10:51:42,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:42,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:42,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:42,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:42,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:42,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:42,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:42,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 10:51:42,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484291058] [2020-10-16 10:51:42,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:42,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:42,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:42,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:42,760 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-16 10:51:43,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:43,066 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-16 10:51:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:51:43,067 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 10:51:43,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:43,068 INFO L225 Difference]: With dead ends: 76 [2020-10-16 10:51:43,068 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 10:51:43,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:51:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 10:51:43,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-16 10:51:43,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 10:51:43,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-16 10:51:43,071 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-16 10:51:43,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:43,071 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-16 10:51:43,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:43,072 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-16 10:51:43,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:43,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:43,072 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:43,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 10:51:43,273 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:43,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:43,274 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-16 10:51:43,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:43,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980461792] [2020-10-16 10:51:43,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:43,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980461792] [2020-10-16 10:51:43,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583264074] [2020-10-16 10:51:43,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:43,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 10:51:43,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:43,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:43,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:43,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:43,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 10:51:43,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267046855] [2020-10-16 10:51:43,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:43,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:43,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:43,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:43,396 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-16 10:51:43,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:43,735 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-16 10:51:43,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:51:43,735 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 10:51:43,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:43,737 INFO L225 Difference]: With dead ends: 96 [2020-10-16 10:51:43,737 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 10:51:43,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:51:43,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 10:51:43,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-16 10:51:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 10:51:43,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-16 10:51:43,742 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-16 10:51:43,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:43,743 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-16 10:51:43,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:43,743 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-16 10:51:43,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:43,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:43,744 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:43,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 10:51:43,945 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:43,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:43,945 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-16 10:51:43,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:43,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994932348] [2020-10-16 10:51:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:44,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994932348] [2020-10-16 10:51:44,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53566242] [2020-10-16 10:51:44,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:44,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 10:51:44,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:44,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:44,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:44,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:44,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 10:51:44,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212164331] [2020-10-16 10:51:44,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:44,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:44,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:44,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:44,181 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-16 10:51:44,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:44,568 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-16 10:51:44,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:51:44,568 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 10:51:44,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:44,569 INFO L225 Difference]: With dead ends: 77 [2020-10-16 10:51:44,569 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 10:51:44,569 INFO L677 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 [2020-10-16 10:51:44,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 10:51:44,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-16 10:51:44,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 10:51:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-16 10:51:44,572 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-16 10:51:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:44,572 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-16 10:51:44,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-16 10:51:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:44,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:44,573 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:44,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 10:51:44,781 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:44,781 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-16 10:51:44,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:44,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925619366] [2020-10-16 10:51:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:44,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:44,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925619366] [2020-10-16 10:51:44,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743740988] [2020-10-16 10:51:44,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:44,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:44,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:44,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:44,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 10:51:44,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113204068] [2020-10-16 10:51:44,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:44,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:44,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:44,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:44,990 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-16 10:51:45,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:45,188 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-16 10:51:45,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:51:45,189 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 10:51:45,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:45,190 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:51:45,190 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 10:51:45,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:51:45,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 10:51:45,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-16 10:51:45,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 10:51:45,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 10:51:45,194 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 10:51:45,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:45,194 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 10:51:45,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:45,194 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 10:51:45,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:45,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:45,195 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:45,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 10:51:45,406 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:45,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:45,407 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-16 10:51:45,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:45,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205229085] [2020-10-16 10:51:45,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:45,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205229085] [2020-10-16 10:51:45,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586854417] [2020-10-16 10:51:45,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:45,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:45,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:45,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:45,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:45,570 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:45,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:45,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 10:51:45,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127606191] [2020-10-16 10:51:45,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:45,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:45,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:45,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:45,585 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 10:51:45,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:45,820 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-16 10:51:45,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:51:45,821 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 10:51:45,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:45,822 INFO L225 Difference]: With dead ends: 81 [2020-10-16 10:51:45,822 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 10:51:45,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:51:45,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 10:51:45,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-16 10:51:45,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 10:51:45,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 10:51:45,826 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 10:51:45,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:45,826 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 10:51:45,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:45,826 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 10:51:45,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:45,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:45,827 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:46,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 10:51:46,030 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:46,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:46,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-16 10:51:46,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:46,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173900558] [2020-10-16 10:51:46,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:46,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173900558] [2020-10-16 10:51:46,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072460301] [2020-10-16 10:51:46,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:46,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 10:51:46,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:46,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:46,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:46,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:46,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 10:51:46,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614924873] [2020-10-16 10:51:46,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:46,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:46,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:46,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:46,181 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 10:51:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:46,416 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-16 10:51:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:46,417 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 10:51:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:46,418 INFO L225 Difference]: With dead ends: 78 [2020-10-16 10:51:46,418 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 10:51:46,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:51:46,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 10:51:46,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-16 10:51:46,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 10:51:46,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 10:51:46,424 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 10:51:46,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:46,425 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 10:51:46,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:46,425 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 10:51:46,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:46,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:46,426 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:46,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-16 10:51:46,627 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:46,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:46,627 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-16 10:51:46,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:46,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642427948] [2020-10-16 10:51:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:46,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642427948] [2020-10-16 10:51:46,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836071334] [2020-10-16 10:51:46,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:46,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:46,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:46,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:46,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:46,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:46,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:46,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:46,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 10:51:46,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305185075] [2020-10-16 10:51:46,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:46,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:46,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:46,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:46,804 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 10:51:47,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:47,116 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-16 10:51:47,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:51:47,117 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 10:51:47,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:47,117 INFO L225 Difference]: With dead ends: 77 [2020-10-16 10:51:47,118 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 10:51:47,118 INFO L677 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 [2020-10-16 10:51:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 10:51:47,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-16 10:51:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 10:51:47,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 10:51:47,121 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 10:51:47,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:47,121 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 10:51:47,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:47,121 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 10:51:47,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:47,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:47,122 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:47,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 10:51:47,331 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:47,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:47,331 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-16 10:51:47,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:47,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114534695] [2020-10-16 10:51:47,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:47,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114534695] [2020-10-16 10:51:47,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235986786] [2020-10-16 10:51:47,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:47,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 10:51:47,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:47,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:47,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:47,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:47,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 10:51:47,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250213608] [2020-10-16 10:51:47,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:47,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:47,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:47,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:47,483 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 10:51:47,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:47,742 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-16 10:51:47,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:51:47,743 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 10:51:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:47,744 INFO L225 Difference]: With dead ends: 74 [2020-10-16 10:51:47,744 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 10:51:47,745 INFO L677 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 [2020-10-16 10:51:47,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 10:51:47,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-16 10:51:47,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 10:51:47,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 10:51:47,748 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 10:51:47,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:47,748 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 10:51:47,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:47,748 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 10:51:47,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:47,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:47,749 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:47,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:47,958 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:47,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:47,958 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-16 10:51:47,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:47,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727175633] [2020-10-16 10:51:47,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:48,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727175633] [2020-10-16 10:51:48,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150025122] [2020-10-16 10:51:48,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:48,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 10:51:48,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:48,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:48,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:48,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:48,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:48,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 10:51:48,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62078793] [2020-10-16 10:51:48,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:48,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:48,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:48,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:48,137 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 10:51:48,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:48,514 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-16 10:51:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:51:48,515 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 10:51:48,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:48,516 INFO L225 Difference]: With dead ends: 73 [2020-10-16 10:51:48,516 INFO L226 Difference]: Without dead ends: 67 [2020-10-16 10:51:48,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:51:48,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-16 10:51:48,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-16 10:51:48,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 10:51:48,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 10:51:48,520 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 10:51:48,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:48,521 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 10:51:48,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:48,521 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 10:51:48,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:48,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:48,535 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:48,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 10:51:48,744 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:48,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:48,745 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-16 10:51:48,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:48,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358340548] [2020-10-16 10:51:48,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:48,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358340548] [2020-10-16 10:51:48,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653466388] [2020-10-16 10:51:48,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:48,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:48,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:48,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:48,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 10:51:48,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143890639] [2020-10-16 10:51:48,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:48,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:48,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:48,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:48,907 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 10:51:49,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:49,178 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-16 10:51:49,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:51:49,178 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 10:51:49,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:49,179 INFO L225 Difference]: With dead ends: 89 [2020-10-16 10:51:49,179 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 10:51:49,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:51:49,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 10:51:49,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-16 10:51:49,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 10:51:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-16 10:51:49,184 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-16 10:51:49,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:49,184 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-16 10:51:49,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:49,184 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-16 10:51:49,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:49,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:49,185 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:49,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:49,395 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:49,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:49,395 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-16 10:51:49,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:49,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661304305] [2020-10-16 10:51:49,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:49,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661304305] [2020-10-16 10:51:49,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648778494] [2020-10-16 10:51:49,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:49,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:49,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:49,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:49,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:49,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:49,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 10:51:49,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934916944] [2020-10-16 10:51:49,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:49,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:49,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:49,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:49,548 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-16 10:51:49,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:49,909 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-10-16 10:51:49,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:51:49,909 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 10:51:49,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:49,910 INFO L225 Difference]: With dead ends: 68 [2020-10-16 10:51:49,910 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 10:51:49,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:51:49,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 10:51:49,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-10-16 10:51:49,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 10:51:49,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-16 10:51:49,913 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-16 10:51:49,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:49,913 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-16 10:51:49,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:49,914 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-16 10:51:49,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:49,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:49,914 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:50,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 10:51:50,122 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:50,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:50,122 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-16 10:51:50,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:50,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026516596] [2020-10-16 10:51:50,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:50,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026516596] [2020-10-16 10:51:50,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298463209] [2020-10-16 10:51:50,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:50,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 10:51:50,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:50,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:50,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:50,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:50,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:50,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 10:51:50,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728358679] [2020-10-16 10:51:50,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:50,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:50,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:50,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:50,277 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-16 10:51:50,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:50,683 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-16 10:51:50,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:51:50,684 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 10:51:50,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:50,685 INFO L225 Difference]: With dead ends: 76 [2020-10-16 10:51:50,685 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 10:51:50,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:51:50,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 10:51:50,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-16 10:51:50,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 10:51:50,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-16 10:51:50,690 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-16 10:51:50,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:50,690 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-16 10:51:50,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:50,691 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-16 10:51:50,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:50,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:50,692 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:50,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:50,904 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:50,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:50,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-16 10:51:50,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:50,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672772269] [2020-10-16 10:51:50,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:51,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672772269] [2020-10-16 10:51:51,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211270052] [2020-10-16 10:51:51,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:51,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:51,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:51,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:51,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:51,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:51,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:51,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 10:51:51,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110356665] [2020-10-16 10:51:51,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:51,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:51,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:51,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:51,153 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-16 10:51:51,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:51,516 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-16 10:51:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:51:51,516 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 10:51:51,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:51,517 INFO L225 Difference]: With dead ends: 66 [2020-10-16 10:51:51,517 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 10:51:51,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:51:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 10:51:51,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-16 10:51:51,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 10:51:51,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-16 10:51:51,520 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-16 10:51:51,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:51,521 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-16 10:51:51,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:51,521 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-16 10:51:51,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:51,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:51,521 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:51,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-16 10:51:51,728 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:51,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:51,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-16 10:51:51,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:51,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987566208] [2020-10-16 10:51:51,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:51,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987566208] [2020-10-16 10:51:51,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058464819] [2020-10-16 10:51:51,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:51,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 10:51:51,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:51,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:51,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:51,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:51,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 10:51:51,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470884165] [2020-10-16 10:51:51,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:51,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:51,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:51,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:51,896 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-16 10:51:52,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:52,082 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-16 10:51:52,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:51:52,083 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 10:51:52,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:52,085 INFO L225 Difference]: With dead ends: 72 [2020-10-16 10:51:52,085 INFO L226 Difference]: Without dead ends: 66 [2020-10-16 10:51:52,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:51:52,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-16 10:51:52,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-16 10:51:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 10:51:52,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-16 10:51:52,088 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-16 10:51:52,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:52,088 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-16 10:51:52,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:52,088 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-16 10:51:52,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:52,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:52,089 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:52,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 10:51:52,291 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:52,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:52,291 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-16 10:51:52,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:52,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852195267] [2020-10-16 10:51:52,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:52,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852195267] [2020-10-16 10:51:52,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778737775] [2020-10-16 10:51:52,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:52,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 10:51:52,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:52,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:52,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:52,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:52,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:52,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 10:51:52,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060162300] [2020-10-16 10:51:52,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:52,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:52,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:52,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:52,476 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-16 10:51:52,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:52,705 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-16 10:51:52,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:51:52,705 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 10:51:52,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:52,706 INFO L225 Difference]: With dead ends: 82 [2020-10-16 10:51:52,706 INFO L226 Difference]: Without dead ends: 76 [2020-10-16 10:51:52,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:51:52,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-16 10:51:52,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-16 10:51:52,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 10:51:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-16 10:51:52,710 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-16 10:51:52,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:52,710 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-16 10:51:52,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:52,710 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-16 10:51:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:52,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:52,711 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:52,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-16 10:51:52,920 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:52,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:52,920 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-16 10:51:52,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:52,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684858896] [2020-10-16 10:51:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:53,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684858896] [2020-10-16 10:51:53,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001516873] [2020-10-16 10:51:53,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:53,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:53,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:53,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:53,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 10:51:53,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637905277] [2020-10-16 10:51:53,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:53,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:53,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:53,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:53,077 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-16 10:51:53,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:53,310 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-16 10:51:53,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:51:53,311 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 10:51:53,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:53,312 INFO L225 Difference]: With dead ends: 83 [2020-10-16 10:51:53,312 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 10:51:53,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:51:53,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 10:51:53,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-16 10:51:53,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 10:51:53,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-16 10:51:53,315 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-16 10:51:53,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:53,315 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-16 10:51:53,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:53,316 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-16 10:51:53,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:53,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:53,316 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:53,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-16 10:51:53,525 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:53,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:53,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-16 10:51:53,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:53,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286294396] [2020-10-16 10:51:53,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:53,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286294396] [2020-10-16 10:51:53,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020361400] [2020-10-16 10:51:53,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:53,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:53,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:53,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:53,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:53,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:53,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:53,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 10:51:53,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135876650] [2020-10-16 10:51:53,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:53,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:53,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:53,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:53,736 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-16 10:51:54,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:54,017 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-16 10:51:54,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:51:54,022 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 10:51:54,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:54,022 INFO L225 Difference]: With dead ends: 89 [2020-10-16 10:51:54,022 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 10:51:54,023 INFO L677 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 [2020-10-16 10:51:54,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 10:51:54,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-16 10:51:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 10:51:54,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-16 10:51:54,025 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-16 10:51:54,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:54,025 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-16 10:51:54,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:54,025 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-16 10:51:54,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:54,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:54,025 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:54,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:54,226 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:54,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:54,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-16 10:51:54,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:54,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244124281] [2020-10-16 10:51:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:54,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244124281] [2020-10-16 10:51:54,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556845204] [2020-10-16 10:51:54,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:54,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 10:51:54,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:54,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:54,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:54,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:54,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 10:51:54,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731431900] [2020-10-16 10:51:54,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:54,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:54,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:54,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:54,408 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-16 10:51:54,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:54,699 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-16 10:51:54,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:51:54,700 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 10:51:54,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:54,701 INFO L225 Difference]: With dead ends: 89 [2020-10-16 10:51:54,701 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 10:51:54,701 INFO L677 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 [2020-10-16 10:51:54,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 10:51:54,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-16 10:51:54,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 10:51:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 10:51:54,706 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-16 10:51:54,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:54,706 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 10:51:54,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:54,707 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 10:51:54,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:54,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:54,707 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:54,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:54,912 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:54,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:54,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-16 10:51:54,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:54,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800265748] [2020-10-16 10:51:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:55,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800265748] [2020-10-16 10:51:55,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499079785] [2020-10-16 10:51:55,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:55,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:55,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:55,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:55,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:55,070 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:55,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:55,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 10:51:55,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91107984] [2020-10-16 10:51:55,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:55,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:55,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:55,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:55,094 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-16 10:51:55,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:55,436 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-16 10:51:55,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:51:55,437 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 10:51:55,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:55,438 INFO L225 Difference]: With dead ends: 86 [2020-10-16 10:51:55,438 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 10:51:55,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:51:55,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 10:51:55,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-16 10:51:55,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 10:51:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 10:51:55,441 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-16 10:51:55,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:55,441 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 10:51:55,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:55,442 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 10:51:55,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:55,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:55,442 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:55,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-16 10:51:55,651 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:55,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:55,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-16 10:51:55,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:55,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69855470] [2020-10-16 10:51:55,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:55,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69855470] [2020-10-16 10:51:55,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490060973] [2020-10-16 10:51:55,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:55,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 10:51:55,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:55,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:55,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:55,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:55,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 10:51:55,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637355045] [2020-10-16 10:51:55,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:55,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:55,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:55,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:55,801 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-16 10:51:56,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:56,123 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-16 10:51:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:51:56,123 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 10:51:56,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:56,124 INFO L225 Difference]: With dead ends: 87 [2020-10-16 10:51:56,124 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 10:51:56,124 INFO L677 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 [2020-10-16 10:51:56,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 10:51:56,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-16 10:51:56,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 10:51:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-16 10:51:56,127 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-16 10:51:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:56,127 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-16 10:51:56,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-16 10:51:56,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:56,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:56,128 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:56,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:56,336 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:56,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:56,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-16 10:51:56,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:56,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699576202] [2020-10-16 10:51:56,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:56,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699576202] [2020-10-16 10:51:56,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470925202] [2020-10-16 10:51:56,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:56,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 10:51:56,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:56,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:56,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:56,555 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:56,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:56,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 10:51:56,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043794188] [2020-10-16 10:51:56,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:56,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:56,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:56,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:56,570 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-16 10:51:57,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:57,008 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-16 10:51:57,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:51:57,008 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 10:51:57,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:57,009 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:51:57,009 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 10:51:57,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:51:57,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 10:51:57,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-16 10:51:57,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 10:51:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-16 10:51:57,012 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-16 10:51:57,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:57,012 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-16 10:51:57,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-16 10:51:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:57,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:57,013 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:57,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 10:51:57,221 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:57,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:57,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-16 10:51:57,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:57,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491413865] [2020-10-16 10:51:57,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:57,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:57,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491413865] [2020-10-16 10:51:57,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641053424] [2020-10-16 10:51:57,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:57,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:57,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:57,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:57,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 10:51:57,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254619077] [2020-10-16 10:51:57,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:57,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:57,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:57,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:57,373 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-16 10:51:57,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:57,740 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-16 10:51:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:51:57,741 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 10:51:57,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:57,742 INFO L225 Difference]: With dead ends: 104 [2020-10-16 10:51:57,742 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 10:51:57,742 INFO L677 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 [2020-10-16 10:51:57,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 10:51:57,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-16 10:51:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 10:51:57,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-16 10:51:57,744 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-16 10:51:57,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:57,745 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-16 10:51:57,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:57,745 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-16 10:51:57,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:57,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:57,745 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:57,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 10:51:57,947 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:57,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:57,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-16 10:51:57,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:57,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605137188] [2020-10-16 10:51:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:58,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605137188] [2020-10-16 10:51:58,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499036460] [2020-10-16 10:51:58,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:58,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:58,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:58,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:58,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:58,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:58,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:58,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 10:51:58,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221726254] [2020-10-16 10:51:58,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:58,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:58,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:58,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:58,138 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-16 10:51:58,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:58,611 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-16 10:51:58,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:51:58,612 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 10:51:58,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:58,613 INFO L225 Difference]: With dead ends: 85 [2020-10-16 10:51:58,613 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 10:51:58,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:51:58,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 10:51:58,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-16 10:51:58,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 10:51:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-16 10:51:58,617 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-16 10:51:58,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:58,618 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-16 10:51:58,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:58,618 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-16 10:51:58,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:51:58,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:58,619 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:58,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-16 10:51:58,828 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:58,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:58,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-16 10:51:58,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:58,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713781725] [2020-10-16 10:51:58,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:58,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713781725] [2020-10-16 10:51:58,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613514058] [2020-10-16 10:51:58,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:59,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 10:51:59,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:59,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:51:59,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:59,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:59,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 10:51:59,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653306127] [2020-10-16 10:51:59,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:59,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:59,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:59,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:59,054 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-16 10:51:59,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:59,268 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-16 10:51:59,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:59,268 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 10:51:59,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:59,269 INFO L225 Difference]: With dead ends: 94 [2020-10-16 10:51:59,270 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 10:51:59,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:51:59,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 10:51:59,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-16 10:51:59,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 10:51:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 10:51:59,273 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 10:51:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:59,273 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 10:51:59,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 10:51:59,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:51:59,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:59,273 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:59,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-16 10:51:59,474 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:59,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:59,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-16 10:51:59,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:59,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743803980] [2020-10-16 10:51:59,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:59,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743803980] [2020-10-16 10:51:59,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977790850] [2020-10-16 10:51:59,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:59,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:59,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:59,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:51:59,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:59,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:59,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:59,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 10:51:59,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997479413] [2020-10-16 10:51:59,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:51:59,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:59,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:51:59,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:51:59,742 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 10:52:00,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:00,107 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-16 10:52:00,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:52:00,108 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 10:52:00,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:00,109 INFO L225 Difference]: With dead ends: 91 [2020-10-16 10:52:00,109 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 10:52:00,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:52:00,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 10:52:00,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-16 10:52:00,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:52:00,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 10:52:00,113 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 10:52:00,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:00,113 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 10:52:00,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:00,113 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 10:52:00,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:00,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:00,114 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:00,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-16 10:52:00,318 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:00,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:00,319 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-16 10:52:00,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:00,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311342144] [2020-10-16 10:52:00,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:00,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311342144] [2020-10-16 10:52:00,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041196868] [2020-10-16 10:52:00,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:00,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 10:52:00,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:00,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:00,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:00,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:00,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 10:52:00,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685020433] [2020-10-16 10:52:00,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:52:00,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:00,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:52:00,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:52:00,521 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 10:52:00,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:00,788 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-16 10:52:00,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:52:00,789 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 10:52:00,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:00,790 INFO L225 Difference]: With dead ends: 88 [2020-10-16 10:52:00,790 INFO L226 Difference]: Without dead ends: 82 [2020-10-16 10:52:00,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:52:00,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-16 10:52:00,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-16 10:52:00,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 10:52:00,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 10:52:00,795 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 10:52:00,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:00,795 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 10:52:00,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:52:00,795 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 10:52:00,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:00,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:00,796 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:01,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:01,004 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:01,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:01,005 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-16 10:52:01,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:01,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363046067] [2020-10-16 10:52:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:01,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363046067] [2020-10-16 10:52:01,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096522636] [2020-10-16 10:52:01,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:01,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 10:52:01,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:01,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:01,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:01,201 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:01,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:01,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 10:52:01,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053948806] [2020-10-16 10:52:01,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:01,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:01,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:01,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:01,215 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 10:52:01,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:01,563 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-16 10:52:01,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:52:01,563 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 10:52:01,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:01,564 INFO L225 Difference]: With dead ends: 87 [2020-10-16 10:52:01,564 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 10:52:01,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:52:01,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 10:52:01,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-16 10:52:01,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:52:01,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 10:52:01,568 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 10:52:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:01,568 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 10:52:01,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:01,568 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 10:52:01,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:01,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:01,568 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:01,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:01,769 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:01,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:01,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-16 10:52:01,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:01,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937319824] [2020-10-16 10:52:01,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:01,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:01,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937319824] [2020-10-16 10:52:01,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171206876] [2020-10-16 10:52:01,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:01,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:01,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:01,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:01,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 10:52:01,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263005775] [2020-10-16 10:52:01,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:52:01,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:01,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:52:01,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:52:01,951 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 10:52:02,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:02,278 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-16 10:52:02,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:52:02,278 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 10:52:02,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:02,279 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:52:02,280 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 10:52:02,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:52:02,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 10:52:02,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-16 10:52:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 10:52:02,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 10:52:02,282 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 10:52:02,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:02,282 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 10:52:02,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:52:02,282 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 10:52:02,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:02,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:02,283 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:02,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-16 10:52:02,487 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:02,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:02,487 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-16 10:52:02,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:02,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143406900] [2020-10-16 10:52:02,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:02,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143406900] [2020-10-16 10:52:02,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521204167] [2020-10-16 10:52:02,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:02,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:02,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:02,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:02,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:02,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:02,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:02,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 10:52:02,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355134040] [2020-10-16 10:52:02,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:02,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:02,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:02,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:02,672 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 10:52:03,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:03,116 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-16 10:52:03,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:52:03,117 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 10:52:03,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:03,118 INFO L225 Difference]: With dead ends: 83 [2020-10-16 10:52:03,118 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 10:52:03,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:52:03,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 10:52:03,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-16 10:52:03,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:52:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 10:52:03,121 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 10:52:03,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:03,121 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 10:52:03,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:03,121 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 10:52:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:03,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:03,122 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:03,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:03,325 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:03,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:03,325 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-16 10:52:03,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:03,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829956876] [2020-10-16 10:52:03,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:03,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829956876] [2020-10-16 10:52:03,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194475401] [2020-10-16 10:52:03,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:03,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 10:52:03,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:03,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:03,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:03,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:03,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 10:52:03,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108931785] [2020-10-16 10:52:03,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:52:03,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:03,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:52:03,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:52:03,494 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 10:52:03,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:03,867 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-16 10:52:03,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:52:03,867 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 10:52:03,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:03,868 INFO L225 Difference]: With dead ends: 80 [2020-10-16 10:52:03,868 INFO L226 Difference]: Without dead ends: 74 [2020-10-16 10:52:03,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:52:03,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-16 10:52:03,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-16 10:52:03,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 10:52:03,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 10:52:03,871 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 10:52:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:03,872 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 10:52:03,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:52:03,872 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 10:52:03,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:03,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:03,872 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:04,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-16 10:52:04,073 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:04,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:04,074 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-16 10:52:04,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:04,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081533992] [2020-10-16 10:52:04,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:04,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081533992] [2020-10-16 10:52:04,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444116985] [2020-10-16 10:52:04,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:04,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:04,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:04,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:04,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:04,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:04,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:04,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 10:52:04,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752415002] [2020-10-16 10:52:04,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:04,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:04,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:04,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:04,248 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 10:52:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:04,765 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-16 10:52:04,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:52:04,766 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 10:52:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:04,766 INFO L225 Difference]: With dead ends: 79 [2020-10-16 10:52:04,766 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 10:52:04,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:52:04,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 10:52:04,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-16 10:52:04,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:52:04,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 10:52:04,768 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 10:52:04,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:04,769 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 10:52:04,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:04,769 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 10:52:04,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:04,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:04,769 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:04,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:04,970 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:04,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:04,971 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-16 10:52:04,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:04,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476083350] [2020-10-16 10:52:04,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:05,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476083350] [2020-10-16 10:52:05,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269406292] [2020-10-16 10:52:05,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:05,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 10:52:05,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:05,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:05,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:05,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:05,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:05,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 10:52:05,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397205766] [2020-10-16 10:52:05,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:52:05,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:05,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:52:05,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:52:05,141 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 10:52:05,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:05,531 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-16 10:52:05,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:05,532 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 10:52:05,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:05,533 INFO L225 Difference]: With dead ends: 95 [2020-10-16 10:52:05,533 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 10:52:05,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:52:05,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 10:52:05,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-16 10:52:05,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 10:52:05,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-16 10:52:05,537 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-16 10:52:05,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:05,537 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-16 10:52:05,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:52:05,537 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-16 10:52:05,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:05,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:05,537 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:05,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-16 10:52:05,738 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:05,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:05,739 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-16 10:52:05,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:05,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600254432] [2020-10-16 10:52:05,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:05,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600254432] [2020-10-16 10:52:05,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518416638] [2020-10-16 10:52:05,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:05,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 10:52:05,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:05,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:05,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:05,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:05,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:05,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 10:52:05,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716723870] [2020-10-16 10:52:05,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:05,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:05,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:05,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:05,918 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-16 10:52:06,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:06,472 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-16 10:52:06,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:52:06,473 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 10:52:06,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:06,473 INFO L225 Difference]: With dead ends: 76 [2020-10-16 10:52:06,474 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 10:52:06,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:52:06,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 10:52:06,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-16 10:52:06,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 10:52:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-16 10:52:06,476 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-16 10:52:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:06,477 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-16 10:52:06,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-16 10:52:06,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:06,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:06,477 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:06,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:06,678 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:06,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:06,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-16 10:52:06,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:06,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385203349] [2020-10-16 10:52:06,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:06,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385203349] [2020-10-16 10:52:06,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411818396] [2020-10-16 10:52:06,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:06,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:06,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:06,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:52:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:06,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:06,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 10:52:06,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367767920] [2020-10-16 10:52:06,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:06,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:06,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:06,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:06,867 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-16 10:52:07,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:07,381 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-16 10:52:07,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:07,382 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 10:52:07,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:07,383 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:52:07,383 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 10:52:07,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:52:07,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 10:52:07,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-16 10:52:07,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 10:52:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-16 10:52:07,385 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-16 10:52:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:07,385 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-16 10:52:07,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-16 10:52:07,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:07,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:07,386 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:07,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-16 10:52:07,587 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:07,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:07,588 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-16 10:52:07,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:07,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817403794] [2020-10-16 10:52:07,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:07,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:07,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817403794] [2020-10-16 10:52:07,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695028882] [2020-10-16 10:52:07,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:07,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:07,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:07,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:07,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:07,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:52:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:07,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:07,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:07,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107444634] [2020-10-16 10:52:07,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:07,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:07,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:07,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:07,772 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-16 10:52:08,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:08,321 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-16 10:52:08,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:08,321 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:08,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:08,322 INFO L225 Difference]: With dead ends: 72 [2020-10-16 10:52:08,322 INFO L226 Difference]: Without dead ends: 67 [2020-10-16 10:52:08,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:52:08,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-16 10:52:08,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-16 10:52:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 10:52:08,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-16 10:52:08,325 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-16 10:52:08,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:08,326 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-16 10:52:08,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:08,326 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-16 10:52:08,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:08,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:08,326 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:08,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-16 10:52:08,536 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:08,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:08,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-16 10:52:08,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:08,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147347525] [2020-10-16 10:52:08,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:08,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147347525] [2020-10-16 10:52:08,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488127565] [2020-10-16 10:52:08,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:08,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 10:52:08,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:08,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:08,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:08,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:08,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 10:52:08,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849031537] [2020-10-16 10:52:08,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:08,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:08,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:08,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:08,775 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-16 10:52:09,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:09,023 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-16 10:52:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:52:09,024 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 10:52:09,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:09,024 INFO L225 Difference]: With dead ends: 78 [2020-10-16 10:52:09,025 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 10:52:09,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:52:09,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 10:52:09,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-16 10:52:09,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 10:52:09,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-16 10:52:09,028 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-16 10:52:09,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:09,028 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-16 10:52:09,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:09,028 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-16 10:52:09,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:09,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:09,029 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:09,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:09,231 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:09,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:09,231 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-16 10:52:09,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:09,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088237824] [2020-10-16 10:52:09,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:09,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088237824] [2020-10-16 10:52:09,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757113403] [2020-10-16 10:52:09,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:09,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:09,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:09,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:09,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:09,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:09,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:09,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:09,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706509445] [2020-10-16 10:52:09,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:09,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:09,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:09,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:09,456 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-16 10:52:09,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:09,734 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-16 10:52:09,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:52:09,735 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:09,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:09,736 INFO L225 Difference]: With dead ends: 90 [2020-10-16 10:52:09,736 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 10:52:09,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:52:09,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 10:52:09,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-16 10:52:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 10:52:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-16 10:52:09,739 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-16 10:52:09,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:09,740 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-16 10:52:09,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:09,740 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-16 10:52:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:09,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:09,741 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:09,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:09,950 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:09,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:09,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-16 10:52:09,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:09,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310149772] [2020-10-16 10:52:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:10,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310149772] [2020-10-16 10:52:10,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342747107] [2020-10-16 10:52:10,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:10,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 10:52:10,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:10,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:10,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:10,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:10,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 10:52:10,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606818583] [2020-10-16 10:52:10,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:10,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:10,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:10,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:10,137 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-16 10:52:10,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:10,443 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-16 10:52:10,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:52:10,444 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 10:52:10,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:10,445 INFO L225 Difference]: With dead ends: 91 [2020-10-16 10:52:10,445 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 10:52:10,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:52:10,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 10:52:10,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-16 10:52:10,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 10:52:10,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-16 10:52:10,449 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-16 10:52:10,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:10,449 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-16 10:52:10,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:10,449 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-16 10:52:10,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:10,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:10,450 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:10,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:10,651 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:10,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:10,651 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-16 10:52:10,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:10,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384012374] [2020-10-16 10:52:10,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:10,799 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:10,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384012374] [2020-10-16 10:52:10,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260995027] [2020-10-16 10:52:10,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:10,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 10:52:10,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:10,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:10,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:10,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:10,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:10,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:10,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983917105] [2020-10-16 10:52:10,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:10,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:10,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:10,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:10,885 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-16 10:52:11,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:11,212 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-16 10:52:11,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:52:11,212 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:11,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:11,213 INFO L225 Difference]: With dead ends: 99 [2020-10-16 10:52:11,213 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 10:52:11,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:52:11,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 10:52:11,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-16 10:52:11,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 10:52:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-16 10:52:11,216 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-16 10:52:11,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:11,216 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-16 10:52:11,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:11,216 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-16 10:52:11,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:11,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:11,217 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:11,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:11,423 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:11,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:11,424 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-16 10:52:11,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:11,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61675096] [2020-10-16 10:52:11,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:11,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61675096] [2020-10-16 10:52:11,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131355451] [2020-10-16 10:52:11,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:11,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:11,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:11,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:11,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 10:52:11,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44226277] [2020-10-16 10:52:11,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:11,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:11,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:11,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:11,643 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-16 10:52:11,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:11,985 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-16 10:52:11,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:52:11,985 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 10:52:11,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:11,986 INFO L225 Difference]: With dead ends: 99 [2020-10-16 10:52:11,987 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 10:52:11,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:52:11,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 10:52:11,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-16 10:52:11,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 10:52:11,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-16 10:52:11,990 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-16 10:52:11,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:11,990 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-16 10:52:11,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:11,990 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-16 10:52:11,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:11,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:11,991 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:12,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-16 10:52:12,198 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:12,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:12,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-16 10:52:12,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:12,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282496231] [2020-10-16 10:52:12,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:12,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282496231] [2020-10-16 10:52:12,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094714219] [2020-10-16 10:52:12,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:12,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:12,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:12,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:12,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:12,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:12,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:12,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:12,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448443558] [2020-10-16 10:52:12,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:12,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:12,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:12,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:12,402 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-16 10:52:12,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:12,830 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-16 10:52:12,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:52:12,830 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:12,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:12,831 INFO L225 Difference]: With dead ends: 96 [2020-10-16 10:52:12,832 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 10:52:12,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:52:12,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 10:52:12,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-16 10:52:12,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 10:52:12,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-16 10:52:12,835 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-16 10:52:12,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:12,835 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-16 10:52:12,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:12,835 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-16 10:52:12,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:12,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:12,836 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:13,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:13,042 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:13,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:13,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-16 10:52:13,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:13,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682813922] [2020-10-16 10:52:13,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:13,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682813922] [2020-10-16 10:52:13,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994509957] [2020-10-16 10:52:13,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:13,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 10:52:13,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:13,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:13,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:13,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:13,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 10:52:13,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806586193] [2020-10-16 10:52:13,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:13,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:13,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:13,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:13,223 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-16 10:52:13,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:13,621 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-16 10:52:13,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:13,621 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 10:52:13,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:13,622 INFO L225 Difference]: With dead ends: 97 [2020-10-16 10:52:13,622 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 10:52:13,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:52:13,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 10:52:13,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-16 10:52:13,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 10:52:13,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 10:52:13,626 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-16 10:52:13,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:13,626 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 10:52:13,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:13,626 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 10:52:13,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:13,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:13,627 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:13,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-16 10:52:13,832 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:13,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:13,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-16 10:52:13,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:13,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348967234] [2020-10-16 10:52:13,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:13,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348967234] [2020-10-16 10:52:13,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950718729] [2020-10-16 10:52:13,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:14,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:14,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:14,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:14,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:14,056 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:14,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:14,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:14,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454656371] [2020-10-16 10:52:14,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:14,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:14,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:14,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:14,073 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-16 10:52:14,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:14,751 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-16 10:52:14,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:52:14,752 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:14,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:14,753 INFO L225 Difference]: With dead ends: 94 [2020-10-16 10:52:14,753 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 10:52:14,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 10:52:14,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 10:52:14,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-16 10:52:14,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:52:14,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 10:52:14,757 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-16 10:52:14,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:14,758 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 10:52:14,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:14,758 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 10:52:14,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:14,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:14,759 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:14,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:14,971 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:14,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:14,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-16 10:52:14,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:14,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587167847] [2020-10-16 10:52:14,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:15,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587167847] [2020-10-16 10:52:15,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396467253] [2020-10-16 10:52:15,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:15,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 10:52:15,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:15,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:15,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:15,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:15,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 10:52:15,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359102941] [2020-10-16 10:52:15,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:15,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:15,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:15,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:15,152 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-16 10:52:15,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:15,605 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-16 10:52:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:52:15,606 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 10:52:15,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:15,607 INFO L225 Difference]: With dead ends: 95 [2020-10-16 10:52:15,607 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 10:52:15,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:52:15,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 10:52:15,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-16 10:52:15,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 10:52:15,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-16 10:52:15,610 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-16 10:52:15,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:15,611 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-16 10:52:15,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:15,611 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-16 10:52:15,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:15,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:15,611 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:15,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-16 10:52:15,821 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:15,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:15,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-16 10:52:15,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:15,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455764032] [2020-10-16 10:52:15,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:15,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455764032] [2020-10-16 10:52:15,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145404831] [2020-10-16 10:52:15,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:15,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 10:52:15,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:15,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:15,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:15,997 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:16,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:16,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:16,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505647930] [2020-10-16 10:52:16,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:16,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:16,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:16,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:16,011 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-16 10:52:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:16,579 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-16 10:52:16,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:52:16,579 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:16,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:16,580 INFO L225 Difference]: With dead ends: 92 [2020-10-16 10:52:16,581 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 10:52:16,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:52:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 10:52:16,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-16 10:52:16,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 10:52:16,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-16 10:52:16,584 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-16 10:52:16,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:16,584 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-16 10:52:16,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:16,584 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-16 10:52:16,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:16,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:16,585 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:16,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:16,793 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:16,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:16,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-16 10:52:16,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:16,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100057781] [2020-10-16 10:52:16,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:16,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100057781] [2020-10-16 10:52:16,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864545002] [2020-10-16 10:52:16,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:16,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:16,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:17,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:17,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 10:52:17,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172819204] [2020-10-16 10:52:17,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:17,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:17,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:17,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:17,002 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-16 10:52:17,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:17,587 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-16 10:52:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:52:17,588 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 10:52:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:17,589 INFO L225 Difference]: With dead ends: 112 [2020-10-16 10:52:17,589 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 10:52:17,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 10:52:17,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 10:52:17,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-16 10:52:17,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 10:52:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-16 10:52:17,592 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-16 10:52:17,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:17,593 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-16 10:52:17,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:17,593 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-16 10:52:17,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:17,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:17,594 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:17,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:17,801 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:17,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:17,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-16 10:52:17,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:17,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714600204] [2020-10-16 10:52:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:17,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714600204] [2020-10-16 10:52:17,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598052855] [2020-10-16 10:52:17,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:17,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:17,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:17,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:17,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:17,979 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:17,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:17,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:17,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267824178] [2020-10-16 10:52:17,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:17,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:17,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:17,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:17,992 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-16 10:52:18,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:18,601 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-16 10:52:18,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:52:18,601 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:18,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:18,602 INFO L225 Difference]: With dead ends: 93 [2020-10-16 10:52:18,602 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 10:52:18,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:52:18,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 10:52:18,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-16 10:52:18,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 10:52:18,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-16 10:52:18,604 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-16 10:52:18,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:18,605 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-16 10:52:18,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:18,605 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-16 10:52:18,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:18,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:18,605 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:18,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:18,806 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:18,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:18,807 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-16 10:52:18,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:18,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104573723] [2020-10-16 10:52:18,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:18,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104573723] [2020-10-16 10:52:18,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981331352] [2020-10-16 10:52:18,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:19,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 10:52:19,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:19,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:19,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:19,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:19,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 10:52:19,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160359321] [2020-10-16 10:52:19,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:19,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:19,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:19,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:19,031 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-16 10:52:19,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:19,333 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-16 10:52:19,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:52:19,334 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 10:52:19,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:19,335 INFO L225 Difference]: With dead ends: 104 [2020-10-16 10:52:19,335 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 10:52:19,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:52:19,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 10:52:19,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-16 10:52:19,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:52:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 10:52:19,337 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 10:52:19,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:19,338 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 10:52:19,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:19,338 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 10:52:19,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:19,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:19,338 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:19,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:19,539 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:19,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:19,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-16 10:52:19,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:19,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733216512] [2020-10-16 10:52:19,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:19,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733216512] [2020-10-16 10:52:19,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584879221] [2020-10-16 10:52:19,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:19,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:19,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:19,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:19,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:19,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:19,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:19,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:19,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613057685] [2020-10-16 10:52:19,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:19,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:19,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:19,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:19,777 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 10:52:20,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:20,149 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-16 10:52:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:52:20,150 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:20,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:20,151 INFO L225 Difference]: With dead ends: 101 [2020-10-16 10:52:20,151 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 10:52:20,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:52:20,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 10:52:20,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-16 10:52:20,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:52:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 10:52:20,154 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 10:52:20,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:20,155 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 10:52:20,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 10:52:20,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:20,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:20,156 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:20,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:20,364 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:20,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:20,364 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-16 10:52:20,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:20,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46885629] [2020-10-16 10:52:20,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:20,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46885629] [2020-10-16 10:52:20,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904115302] [2020-10-16 10:52:20,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:20,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 10:52:20,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:20,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:20,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:20,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:20,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 10:52:20,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593670746] [2020-10-16 10:52:20,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:20,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:20,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:20,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:20,598 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 10:52:21,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:21,076 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-16 10:52:21,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:52:21,077 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 10:52:21,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:21,078 INFO L225 Difference]: With dead ends: 98 [2020-10-16 10:52:21,079 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 10:52:21,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:52:21,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 10:52:21,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-16 10:52:21,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:52:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 10:52:21,082 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 10:52:21,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:21,082 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 10:52:21,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:21,083 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 10:52:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:21,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:21,083 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:21,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:21,293 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:21,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:21,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-16 10:52:21,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:21,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716109305] [2020-10-16 10:52:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:21,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716109305] [2020-10-16 10:52:21,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523892567] [2020-10-16 10:52:21,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:21,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 10:52:21,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:21,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:21,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:21,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:21,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:21,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:21,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33236350] [2020-10-16 10:52:21,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:21,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:21,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:21,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:21,650 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 10:52:22,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:22,172 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-16 10:52:22,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:52:22,172 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:22,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:22,173 INFO L225 Difference]: With dead ends: 97 [2020-10-16 10:52:22,173 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 10:52:22,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:52:22,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 10:52:22,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-16 10:52:22,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:52:22,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 10:52:22,176 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 10:52:22,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:22,176 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 10:52:22,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:22,177 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 10:52:22,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:22,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:22,177 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:22,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:22,386 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:22,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:22,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-16 10:52:22,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:22,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21197363] [2020-10-16 10:52:22,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:22,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21197363] [2020-10-16 10:52:22,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380914606] [2020-10-16 10:52:22,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:22,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:22,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:22,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:22,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 10:52:22,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616162748] [2020-10-16 10:52:22,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:22,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:22,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:22,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:22,598 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 10:52:22,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:22,995 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-16 10:52:22,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:52:22,995 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 10:52:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:22,997 INFO L225 Difference]: With dead ends: 94 [2020-10-16 10:52:22,997 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 10:52:22,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:52:22,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 10:52:22,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-16 10:52:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:52:23,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 10:52:23,000 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 10:52:23,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:23,000 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 10:52:23,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:23,000 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 10:52:23,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:23,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:23,001 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:23,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-16 10:52:23,205 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:23,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:23,205 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-16 10:52:23,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:23,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384131736] [2020-10-16 10:52:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:23,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384131736] [2020-10-16 10:52:23,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234382091] [2020-10-16 10:52:23,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:23,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:23,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:23,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:23,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:23,421 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:23,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:23,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:23,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528750274] [2020-10-16 10:52:23,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:23,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:23,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:23,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:23,433 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 10:52:23,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:23,957 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-16 10:52:23,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:52:23,957 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:23,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:23,958 INFO L225 Difference]: With dead ends: 93 [2020-10-16 10:52:23,958 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 10:52:23,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:52:23,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 10:52:23,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-16 10:52:23,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:52:23,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 10:52:23,961 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 10:52:23,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:23,962 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 10:52:23,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:23,962 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 10:52:23,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:23,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:23,962 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:24,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:24,163 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:24,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:24,164 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-16 10:52:24,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:24,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071077050] [2020-10-16 10:52:24,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:24,281 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:24,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071077050] [2020-10-16 10:52:24,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591981433] [2020-10-16 10:52:24,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:24,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 10:52:24,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:24,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:24,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:24,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:24,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 10:52:24,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66710702] [2020-10-16 10:52:24,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:24,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:24,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:24,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:24,378 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 10:52:24,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:24,920 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-16 10:52:24,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:24,921 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 10:52:24,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:24,921 INFO L225 Difference]: With dead ends: 90 [2020-10-16 10:52:24,921 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 10:52:24,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 10:52:24,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 10:52:24,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-16 10:52:24,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:52:24,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 10:52:24,924 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 10:52:24,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:24,924 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 10:52:24,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:24,924 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 10:52:24,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:24,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:24,925 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:25,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-16 10:52:25,131 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:25,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:25,132 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-16 10:52:25,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:25,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671461775] [2020-10-16 10:52:25,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:25,268 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:25,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671461775] [2020-10-16 10:52:25,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519388707] [2020-10-16 10:52:25,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:25,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:25,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:25,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:25,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:25,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:25,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:25,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:25,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624547914] [2020-10-16 10:52:25,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:25,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:25,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:25,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:25,351 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 10:52:25,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:25,957 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-16 10:52:25,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:52:25,957 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:25,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:25,958 INFO L225 Difference]: With dead ends: 89 [2020-10-16 10:52:25,958 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 10:52:25,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 10:52:25,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 10:52:25,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-16 10:52:25,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:52:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 10:52:25,961 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 10:52:25,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:25,962 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 10:52:25,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 10:52:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:25,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:25,962 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:26,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:26,163 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:26,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:26,164 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-16 10:52:26,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:26,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161189531] [2020-10-16 10:52:26,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:26,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161189531] [2020-10-16 10:52:26,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479517744] [2020-10-16 10:52:26,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:26,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 10:52:26,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:26,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:26,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:26,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:26,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 10:52:26,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92609095] [2020-10-16 10:52:26,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:26,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:26,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:26,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:26,349 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 10:52:26,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:26,848 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-16 10:52:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:52:26,848 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 10:52:26,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:26,849 INFO L225 Difference]: With dead ends: 86 [2020-10-16 10:52:26,850 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 10:52:26,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:52:26,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 10:52:26,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-16 10:52:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:52:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 10:52:26,853 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 10:52:26,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:26,853 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 10:52:26,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:26,854 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 10:52:26,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:26,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:26,855 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:27,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:27,063 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:27,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:27,063 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-16 10:52:27,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:27,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486425825] [2020-10-16 10:52:27,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:27,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486425825] [2020-10-16 10:52:27,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283571028] [2020-10-16 10:52:27,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:27,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 10:52:27,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:27,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:27,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:27,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:27,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:27,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:27,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864358552] [2020-10-16 10:52:27,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:27,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:27,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:27,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:27,290 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 10:52:27,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:27,977 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-16 10:52:27,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:52:27,978 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:27,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:27,979 INFO L225 Difference]: With dead ends: 85 [2020-10-16 10:52:27,979 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 10:52:27,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:52:27,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 10:52:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-16 10:52:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:52:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 10:52:27,982 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 10:52:27,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:27,982 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 10:52:27,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:27,982 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 10:52:27,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:27,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:27,983 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:28,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:28,184 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:28,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:28,184 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-16 10:52:28,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:28,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436709353] [2020-10-16 10:52:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:28,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436709353] [2020-10-16 10:52:28,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432406050] [2020-10-16 10:52:28,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:28,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:28,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:28,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:28,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 10:52:28,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510476275] [2020-10-16 10:52:28,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:28,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:28,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:28,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:28,367 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 10:52:28,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:28,915 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-16 10:52:28,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:52:28,916 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 10:52:28,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:28,917 INFO L225 Difference]: With dead ends: 101 [2020-10-16 10:52:28,917 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 10:52:28,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:52:28,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 10:52:28,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-16 10:52:28,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 10:52:28,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-16 10:52:28,921 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-16 10:52:28,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:28,922 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-16 10:52:28,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:28,922 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-16 10:52:28,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:28,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:28,922 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:29,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:29,132 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:29,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:29,132 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-16 10:52:29,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:29,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769947957] [2020-10-16 10:52:29,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:29,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769947957] [2020-10-16 10:52:29,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671896894] [2020-10-16 10:52:29,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:29,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:29,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:29,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:29,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:29,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:29,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:29,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535910897] [2020-10-16 10:52:29,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:29,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:29,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:29,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:29,350 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-16 10:52:29,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:29,993 INFO L93 Difference]: Finished difference Result 80 states and 197 transitions. [2020-10-16 10:52:29,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:52:29,993 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:29,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:29,995 INFO L225 Difference]: With dead ends: 80 [2020-10-16 10:52:29,995 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 10:52:29,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:52:29,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 10:52:29,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-16 10:52:29,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 10:52:29,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-16 10:52:29,997 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-16 10:52:29,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:29,998 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-16 10:52:29,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:29,998 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-16 10:52:29,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:29,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:29,998 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:30,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:30,206 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:30,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:30,207 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-16 10:52:30,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:30,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098458053] [2020-10-16 10:52:30,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:30,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098458053] [2020-10-16 10:52:30,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017056652] [2020-10-16 10:52:30,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:30,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 10:52:30,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:30,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:30,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:30,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:52:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:30,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:30,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:30,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288402093] [2020-10-16 10:52:30,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:30,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:30,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:30,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:30,505 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-16 10:52:31,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:31,222 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-16 10:52:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:52:31,223 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:31,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:31,224 INFO L225 Difference]: With dead ends: 92 [2020-10-16 10:52:31,224 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 10:52:31,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:52:31,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 10:52:31,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-16 10:52:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 10:52:31,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-16 10:52:31,229 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-16 10:52:31,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:31,229 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-16 10:52:31,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:31,229 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-16 10:52:31,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:31,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:31,230 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:31,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:31,436 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:31,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:31,436 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-16 10:52:31,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:31,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824028820] [2020-10-16 10:52:31,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:31,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824028820] [2020-10-16 10:52:31,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26881597] [2020-10-16 10:52:31,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:31,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:31,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:31,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:31,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:31,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:52:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:31,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:31,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:31,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406381010] [2020-10-16 10:52:31,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:31,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:31,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:31,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:31,659 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-16 10:52:32,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:32,379 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-16 10:52:32,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:52:32,380 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:32,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:32,381 INFO L225 Difference]: With dead ends: 78 [2020-10-16 10:52:32,381 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 10:52:32,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:52:32,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 10:52:32,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-16 10:52:32,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 10:52:32,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-16 10:52:32,385 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-16 10:52:32,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:32,385 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-16 10:52:32,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:32,385 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-16 10:52:32,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:32,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:32,386 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:32,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-16 10:52:32,595 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:32,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:32,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-16 10:52:32,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:32,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595778054] [2020-10-16 10:52:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:32,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595778054] [2020-10-16 10:52:32,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130865913] [2020-10-16 10:52:32,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:32,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 10:52:32,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:32,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:32,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:32,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:32,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:32,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653778012] [2020-10-16 10:52:32,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:32,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:32,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:32,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:32,818 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-16 10:52:33,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:33,103 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-16 10:52:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:52:33,103 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:33,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:33,104 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:52:33,104 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 10:52:33,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:52:33,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 10:52:33,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-16 10:52:33,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:52:33,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-16 10:52:33,106 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-16 10:52:33,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:33,106 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-16 10:52:33,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:33,107 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-16 10:52:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:33,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:33,107 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:33,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:33,308 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:33,308 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-16 10:52:33,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:33,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84309995] [2020-10-16 10:52:33,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:33,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84309995] [2020-10-16 10:52:33,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407153662] [2020-10-16 10:52:33,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:33,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 10:52:33,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:33,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:33,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:33,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:33,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:33,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:33,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914039130] [2020-10-16 10:52:33,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:33,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:33,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:33,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:33,665 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-16 10:52:34,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:34,034 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-16 10:52:34,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:52:34,035 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:34,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:34,036 INFO L225 Difference]: With dead ends: 98 [2020-10-16 10:52:34,036 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 10:52:34,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:52:34,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 10:52:34,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-16 10:52:34,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 10:52:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-16 10:52:34,038 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-16 10:52:34,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:34,039 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-16 10:52:34,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:34,039 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-16 10:52:34,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:34,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:34,039 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:34,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-16 10:52:34,240 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:34,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:34,240 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-16 10:52:34,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:34,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098367670] [2020-10-16 10:52:34,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:34,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098367670] [2020-10-16 10:52:34,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928565229] [2020-10-16 10:52:34,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:34,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:34,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:34,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:34,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:34,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227829041] [2020-10-16 10:52:34,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:34,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:34,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:34,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:34,476 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-16 10:52:34,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:34,914 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-16 10:52:34,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:52:34,915 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:34,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:34,916 INFO L225 Difference]: With dead ends: 99 [2020-10-16 10:52:34,916 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 10:52:34,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:52:34,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 10:52:34,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-16 10:52:34,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 10:52:34,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-16 10:52:34,919 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-16 10:52:34,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:34,919 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-16 10:52:34,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:34,919 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-16 10:52:34,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:34,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:34,920 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:35,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:35,120 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:35,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:35,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-16 10:52:35,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:35,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814540325] [2020-10-16 10:52:35,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:35,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814540325] [2020-10-16 10:52:35,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57547658] [2020-10-16 10:52:35,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:35,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:35,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:35,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:35,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:35,452 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:35,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:35,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:35,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531071904] [2020-10-16 10:52:35,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:35,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:35,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:35,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:35,466 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-16 10:52:35,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:35,892 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-16 10:52:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:52:35,892 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:35,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:35,894 INFO L225 Difference]: With dead ends: 109 [2020-10-16 10:52:35,894 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 10:52:35,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 10:52:35,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 10:52:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-16 10:52:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:52:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-16 10:52:35,899 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-16 10:52:35,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:35,899 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-16 10:52:35,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-16 10:52:35,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:35,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:35,900 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:36,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:36,108 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:36,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:36,109 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-16 10:52:36,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:36,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393083652] [2020-10-16 10:52:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:36,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393083652] [2020-10-16 10:52:36,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922323896] [2020-10-16 10:52:36,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:36,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 10:52:36,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:36,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:36,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:36,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:36,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:36,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532356289] [2020-10-16 10:52:36,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:36,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:36,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:36,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:36,341 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-16 10:52:36,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:36,777 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-16 10:52:36,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:36,777 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:36,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:36,779 INFO L225 Difference]: With dead ends: 109 [2020-10-16 10:52:36,779 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 10:52:36,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:52:36,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 10:52:36,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-16 10:52:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 10:52:36,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-16 10:52:36,783 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-16 10:52:36,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:36,783 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-16 10:52:36,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:36,784 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-16 10:52:36,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:36,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:36,784 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:36,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-16 10:52:36,995 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:36,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:36,995 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-16 10:52:36,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:36,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022293415] [2020-10-16 10:52:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:37,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022293415] [2020-10-16 10:52:37,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831912700] [2020-10-16 10:52:37,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:37,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:37,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:37,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:37,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:37,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:37,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:37,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:37,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106111089] [2020-10-16 10:52:37,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:37,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:37,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:37,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:37,242 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-16 10:52:37,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:37,776 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-16 10:52:37,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:52:37,776 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:37,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:37,778 INFO L225 Difference]: With dead ends: 106 [2020-10-16 10:52:37,778 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 10:52:37,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:52:37,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 10:52:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-16 10:52:37,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 10:52:37,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-16 10:52:37,781 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-16 10:52:37,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:37,781 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-16 10:52:37,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:37,782 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-16 10:52:37,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:37,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:37,782 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:37,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-16 10:52:37,983 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:37,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:37,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-16 10:52:37,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:37,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133818575] [2020-10-16 10:52:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:38,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133818575] [2020-10-16 10:52:38,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161242052] [2020-10-16 10:52:38,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:38,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 10:52:38,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:38,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:38,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:38,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:38,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:38,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749141652] [2020-10-16 10:52:38,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:38,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:38,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:38,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:38,230 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-16 10:52:38,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:38,709 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-16 10:52:38,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:52:38,710 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:38,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:38,710 INFO L225 Difference]: With dead ends: 107 [2020-10-16 10:52:38,711 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 10:52:38,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 10:52:38,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 10:52:38,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-16 10:52:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 10:52:38,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-16 10:52:38,714 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-16 10:52:38,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:38,714 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-16 10:52:38,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:38,714 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-16 10:52:38,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:38,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:38,715 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:38,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:38,918 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:38,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:38,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-16 10:52:38,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:38,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904204640] [2020-10-16 10:52:38,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:39,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904204640] [2020-10-16 10:52:39,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988398675] [2020-10-16 10:52:39,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:39,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 10:52:39,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:39,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:39,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:39,148 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:39,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:39,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:39,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336323868] [2020-10-16 10:52:39,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:39,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:39,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:39,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:39,164 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-16 10:52:39,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:39,727 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-16 10:52:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:52:39,727 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:39,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:39,728 INFO L225 Difference]: With dead ends: 104 [2020-10-16 10:52:39,728 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 10:52:39,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:52:39,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 10:52:39,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-16 10:52:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 10:52:39,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-16 10:52:39,733 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-16 10:52:39,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:39,733 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-16 10:52:39,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:39,733 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-16 10:52:39,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:39,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:39,734 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:39,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-16 10:52:39,943 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:39,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:39,943 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-16 10:52:39,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:39,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800620140] [2020-10-16 10:52:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:40,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800620140] [2020-10-16 10:52:40,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364312124] [2020-10-16 10:52:40,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:40,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:40,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:40,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:40,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:40,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146461180] [2020-10-16 10:52:40,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:40,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:40,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:40,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:40,185 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-16 10:52:40,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:40,697 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-16 10:52:40,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:52:40,698 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:40,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:40,699 INFO L225 Difference]: With dead ends: 105 [2020-10-16 10:52:40,699 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 10:52:40,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:52:40,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 10:52:40,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-16 10:52:40,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:52:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 10:52:40,702 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-16 10:52:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:40,703 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 10:52:40,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 10:52:40,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:40,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:40,703 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:40,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:40,909 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:40,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:40,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-16 10:52:40,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:40,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406520169] [2020-10-16 10:52:40,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:41,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406520169] [2020-10-16 10:52:41,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861651461] [2020-10-16 10:52:41,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:41,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:41,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:41,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:41,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:41,131 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:41,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:41,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:41,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095011452] [2020-10-16 10:52:41,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:41,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:41,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:41,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:41,144 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-16 10:52:41,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:41,809 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-16 10:52:41,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:52:41,810 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:41,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:41,810 INFO L225 Difference]: With dead ends: 102 [2020-10-16 10:52:41,811 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 10:52:41,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:52:41,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 10:52:41,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-16 10:52:41,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:52:41,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 10:52:41,813 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-16 10:52:41,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:41,813 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 10:52:41,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:41,813 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 10:52:41,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:41,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:41,814 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:42,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-16 10:52:42,021 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:42,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:42,021 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-16 10:52:42,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:42,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831502358] [2020-10-16 10:52:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:42,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831502358] [2020-10-16 10:52:42,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479419958] [2020-10-16 10:52:42,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:42,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 10:52:42,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:42,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:42,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:42,221 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:42,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:42,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:42,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730314698] [2020-10-16 10:52:42,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:42,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:42,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:42,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:42,223 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-16 10:52:42,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:42,794 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-16 10:52:42,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:52:42,795 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:42,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:42,796 INFO L225 Difference]: With dead ends: 103 [2020-10-16 10:52:42,796 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 10:52:42,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:52:42,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 10:52:42,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-16 10:52:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 10:52:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-16 10:52:42,800 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-16 10:52:42,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:42,800 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-16 10:52:42,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:42,800 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-16 10:52:42,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:42,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:42,801 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:43,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:43,001 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:43,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:43,002 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-16 10:52:43,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:43,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979179121] [2020-10-16 10:52:43,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:43,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979179121] [2020-10-16 10:52:43,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342810810] [2020-10-16 10:52:43,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:43,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:43,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:43,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:43,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:43,218 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:43,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:43,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:43,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699304876] [2020-10-16 10:52:43,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:43,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:43,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:43,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:43,234 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-16 10:52:43,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:43,986 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-16 10:52:43,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:52:43,987 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:43,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:43,987 INFO L225 Difference]: With dead ends: 100 [2020-10-16 10:52:43,987 INFO L226 Difference]: Without dead ends: 94 [2020-10-16 10:52:43,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:52:43,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-16 10:52:43,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-16 10:52:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 10:52:43,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-16 10:52:43,991 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-16 10:52:43,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:43,991 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-16 10:52:43,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:43,991 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-16 10:52:43,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:43,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:43,992 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:44,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-16 10:52:44,199 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:44,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:44,199 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-16 10:52:44,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:44,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575226086] [2020-10-16 10:52:44,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:44,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575226086] [2020-10-16 10:52:44,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910444011] [2020-10-16 10:52:44,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:44,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 10:52:44,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:44,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:44,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:44,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:44,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:44,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486257687] [2020-10-16 10:52:44,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:44,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:44,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:44,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:44,404 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-16 10:52:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:45,063 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-16 10:52:45,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:52:45,064 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:45,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:45,064 INFO L225 Difference]: With dead ends: 120 [2020-10-16 10:52:45,065 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 10:52:45,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:52:45,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 10:52:45,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-16 10:52:45,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 10:52:45,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-16 10:52:45,071 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-16 10:52:45,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:45,072 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-16 10:52:45,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:45,072 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-16 10:52:45,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:45,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:45,072 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:45,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-16 10:52:45,273 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:45,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:45,274 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-16 10:52:45,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:45,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711880002] [2020-10-16 10:52:45,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:45,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711880002] [2020-10-16 10:52:45,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938877140] [2020-10-16 10:52:45,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:45,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 10:52:45,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:45,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:45,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:45,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:45,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:45,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224581545] [2020-10-16 10:52:45,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:45,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:45,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:45,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:45,513 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-16 10:52:46,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:46,346 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-16 10:52:46,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:52:46,347 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:46,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:46,347 INFO L225 Difference]: With dead ends: 101 [2020-10-16 10:52:46,347 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 10:52:46,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:52:46,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 10:52:46,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-16 10:52:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 10:52:46,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-16 10:52:46,350 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-16 10:52:46,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:46,350 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-16 10:52:46,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:46,351 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-16 10:52:46,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:46,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:46,354 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:46,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:46,555 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:46,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:46,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-16 10:52:46,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:46,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034773563] [2020-10-16 10:52:46,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:46,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034773563] [2020-10-16 10:52:46,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065538588] [2020-10-16 10:52:46,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:46,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:46,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:46,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:46,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:46,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449614291] [2020-10-16 10:52:46,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:46,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:46,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:46,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:46,824 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-16 10:52:47,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:47,199 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-16 10:52:47,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:52:47,200 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:47,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:47,201 INFO L225 Difference]: With dead ends: 114 [2020-10-16 10:52:47,201 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 10:52:47,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:52:47,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 10:52:47,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-16 10:52:47,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:52:47,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:52:47,204 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 10:52:47,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:47,204 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:52:47,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:47,204 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:52:47,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:47,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:47,204 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:47,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:47,405 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:47,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:47,406 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-16 10:52:47,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:47,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816735496] [2020-10-16 10:52:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:47,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816735496] [2020-10-16 10:52:47,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64099467] [2020-10-16 10:52:47,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:47,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:47,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:47,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:47,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:47,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:47,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:47,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:47,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299084024] [2020-10-16 10:52:47,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:47,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:47,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:47,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:47,701 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 10:52:48,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:48,175 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-16 10:52:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:52:48,176 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:48,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:48,177 INFO L225 Difference]: With dead ends: 111 [2020-10-16 10:52:48,177 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 10:52:48,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:52:48,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 10:52:48,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-16 10:52:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:52:48,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:52:48,179 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 10:52:48,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:48,179 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:52:48,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:48,180 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:52:48,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:48,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:48,180 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:48,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-16 10:52:48,381 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:48,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:48,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-16 10:52:48,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:48,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572139536] [2020-10-16 10:52:48,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:48,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572139536] [2020-10-16 10:52:48,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933909929] [2020-10-16 10:52:48,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:48,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 10:52:48,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:48,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:48,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:48,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:48,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:48,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676019168] [2020-10-16 10:52:48,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:48,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:48,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:48,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:48,636 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 10:52:49,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:49,062 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-16 10:52:49,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:52:49,063 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:49,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:49,064 INFO L225 Difference]: With dead ends: 108 [2020-10-16 10:52:49,064 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 10:52:49,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 10:52:49,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 10:52:49,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-16 10:52:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:52:49,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:52:49,066 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 10:52:49,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:49,066 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:52:49,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:49,067 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:52:49,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:49,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:49,069 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:49,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:49,273 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:49,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:49,273 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-16 10:52:49,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:49,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036266601] [2020-10-16 10:52:49,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:49,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036266601] [2020-10-16 10:52:49,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100159900] [2020-10-16 10:52:49,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:49,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:49,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:49,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:49,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:49,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:49,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:49,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:49,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083516114] [2020-10-16 10:52:49,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:49,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:49,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:49,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:49,556 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 10:52:50,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:50,073 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-16 10:52:50,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:52:50,073 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:50,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:50,074 INFO L225 Difference]: With dead ends: 107 [2020-10-16 10:52:50,074 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 10:52:50,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 10:52:50,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 10:52:50,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-16 10:52:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:52:50,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:52:50,077 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 10:52:50,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:50,078 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:52:50,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:50,078 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:52:50,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:50,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:50,078 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:50,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-16 10:52:50,287 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:50,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:50,287 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-16 10:52:50,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:50,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651871229] [2020-10-16 10:52:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:50,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651871229] [2020-10-16 10:52:50,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839746739] [2020-10-16 10:52:50,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:50,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 10:52:50,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:50,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:50,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:50,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:50,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:50,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578877169] [2020-10-16 10:52:50,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:50,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:50,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:50,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:50,546 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 10:52:51,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:51,019 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-16 10:52:51,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:51,020 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:51,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:51,020 INFO L225 Difference]: With dead ends: 104 [2020-10-16 10:52:51,021 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 10:52:51,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:52:51,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 10:52:51,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-16 10:52:51,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:52:51,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:52:51,024 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 10:52:51,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:51,024 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:52:51,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:51,024 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:52:51,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:51,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:51,025 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:51,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-16 10:52:51,227 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:51,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:51,227 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-16 10:52:51,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:51,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371814990] [2020-10-16 10:52:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:51,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371814990] [2020-10-16 10:52:51,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100328738] [2020-10-16 10:52:51,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:51,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 10:52:51,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:51,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:51,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:51,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:51,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:51,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:51,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749497420] [2020-10-16 10:52:51,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:51,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:51,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:51,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:51,501 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 10:52:52,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:52,137 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-16 10:52:52,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:52:52,138 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:52,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:52,139 INFO L225 Difference]: With dead ends: 103 [2020-10-16 10:52:52,139 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 10:52:52,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:52:52,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 10:52:52,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-16 10:52:52,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:52:52,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:52:52,142 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 10:52:52,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:52,142 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:52:52,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:52,142 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:52:52,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:52,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:52,143 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:52,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-16 10:52:52,352 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:52,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:52,352 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-16 10:52:52,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:52,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240340650] [2020-10-16 10:52:52,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:52,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240340650] [2020-10-16 10:52:52,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113968023] [2020-10-16 10:52:52,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:52,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:52,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:52,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:52,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:52,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645189551] [2020-10-16 10:52:52,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:52,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:52,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:52,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:52,592 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 10:52:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:53,131 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-16 10:52:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:52:53,132 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:53,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:53,132 INFO L225 Difference]: With dead ends: 100 [2020-10-16 10:52:53,132 INFO L226 Difference]: Without dead ends: 94 [2020-10-16 10:52:53,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:52:53,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-16 10:52:53,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-16 10:52:53,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:52:53,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:52:53,136 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 10:52:53,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:53,136 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:52:53,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:53,136 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:52:53,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:53,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:53,137 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:53,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:53,340 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:53,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:53,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-16 10:52:53,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:53,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291275192] [2020-10-16 10:52:53,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:53,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291275192] [2020-10-16 10:52:53,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806671472] [2020-10-16 10:52:53,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:53,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:53,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:53,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:53,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:53,580 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:53,593 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:53,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:53,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:53,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957156093] [2020-10-16 10:52:53,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:53,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:53,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:53,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:53,594 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 10:52:54,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:54,313 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-16 10:52:54,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:52:54,314 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:54,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:54,314 INFO L225 Difference]: With dead ends: 99 [2020-10-16 10:52:54,314 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 10:52:54,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:52:54,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 10:52:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-16 10:52:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:52:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:52:54,317 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 10:52:54,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:54,318 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:52:54,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:54,318 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:52:54,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:54,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:54,318 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:54,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-16 10:52:54,519 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:54,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:54,520 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-16 10:52:54,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:54,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162316176] [2020-10-16 10:52:54,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:54,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162316176] [2020-10-16 10:52:54,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376149315] [2020-10-16 10:52:54,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:54,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 10:52:54,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:54,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:54,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:54,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:54,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:54,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72425202] [2020-10-16 10:52:54,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:54,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:54,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:54,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:54,758 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 10:52:55,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:55,354 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-16 10:52:55,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:52:55,355 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:55,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:55,356 INFO L225 Difference]: With dead ends: 96 [2020-10-16 10:52:55,356 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 10:52:55,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:52:55,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 10:52:55,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-16 10:52:55,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:52:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:52:55,358 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 10:52:55,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:55,358 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:52:55,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:55,359 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:52:55,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:55,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:55,359 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:55,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:55,567 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:55,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:55,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-16 10:52:55,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:55,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907194738] [2020-10-16 10:52:55,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:55,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907194738] [2020-10-16 10:52:55,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690013102] [2020-10-16 10:52:55,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:55,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:55,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:55,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:55,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:55,794 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:55,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:55,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:55,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713401387] [2020-10-16 10:52:55,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:55,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:55,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:55,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:55,810 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 10:52:56,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:56,621 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-16 10:52:56,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:52:56,621 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:56,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:56,622 INFO L225 Difference]: With dead ends: 95 [2020-10-16 10:52:56,622 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 10:52:56,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:52:56,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 10:52:56,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-16 10:52:56,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:52:56,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:52:56,625 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 10:52:56,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:56,625 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:52:56,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:56,625 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:52:56,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:56,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:56,626 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:56,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:56,826 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:56,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:56,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-16 10:52:56,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:56,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533316271] [2020-10-16 10:52:56,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:56,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533316271] [2020-10-16 10:52:56,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979646365] [2020-10-16 10:52:56,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:57,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 10:52:57,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:57,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:57,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:57,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:57,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:57,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173680043] [2020-10-16 10:52:57,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:57,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:57,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:57,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:57,057 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 10:52:57,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:57,672 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-16 10:52:57,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:52:57,673 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:57,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:57,674 INFO L225 Difference]: With dead ends: 92 [2020-10-16 10:52:57,674 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 10:52:57,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:52:57,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 10:52:57,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-16 10:52:57,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:52:57,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:52:57,678 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 10:52:57,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:57,679 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:52:57,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:57,679 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:52:57,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:57,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:57,681 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:57,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:57,889 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:57,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:57,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-16 10:52:57,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:57,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672760174] [2020-10-16 10:52:57,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:58,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672760174] [2020-10-16 10:52:58,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022979277] [2020-10-16 10:52:58,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:58,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 10:52:58,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:58,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:58,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:58,185 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:58,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:58,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:58,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144032848] [2020-10-16 10:52:58,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:58,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:58,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:58,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:58,207 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 10:52:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:59,148 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-16 10:52:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:52:59,149 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:59,149 INFO L225 Difference]: With dead ends: 91 [2020-10-16 10:52:59,149 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 10:52:59,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 10:52:59,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 10:52:59,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-16 10:52:59,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:52:59,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:52:59,152 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 10:52:59,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:59,152 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:52:59,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:59,153 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:52:59,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:59,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:59,156 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:59,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:59,357 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:59,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:59,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-16 10:52:59,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:59,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162455986] [2020-10-16 10:52:59,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:59,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162455986] [2020-10-16 10:52:59,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512877561] [2020-10-16 10:52:59,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:59,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:59,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:59,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:59,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:59,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57775871] [2020-10-16 10:52:59,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:59,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:59,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:59,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:59,636 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 10:53:00,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:00,342 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-16 10:53:00,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:53:00,343 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:53:00,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:00,344 INFO L225 Difference]: With dead ends: 107 [2020-10-16 10:53:00,344 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 10:53:00,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:53:00,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 10:53:00,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-16 10:53:00,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 10:53:00,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-16 10:53:00,348 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-16 10:53:00,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:00,349 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-16 10:53:00,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:53:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-16 10:53:00,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:53:00,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:00,349 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:00,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-16 10:53:00,550 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:00,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-16 10:53:00,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:00,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39765639] [2020-10-16 10:53:00,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:00,713 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:00,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39765639] [2020-10-16 10:53:00,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430898339] [2020-10-16 10:53:00,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:00,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:00,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:00,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:53:00,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:00,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:00,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:00,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:53:00,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160033129] [2020-10-16 10:53:00,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:00,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:00,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:00,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:00,802 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-16 10:53:01,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:01,707 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-16 10:53:01,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:53:01,708 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:53:01,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:01,708 INFO L225 Difference]: With dead ends: 88 [2020-10-16 10:53:01,708 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 10:53:01,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:53:01,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 10:53:01,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-16 10:53:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 10:53:01,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-16 10:53:01,710 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-16 10:53:01,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:01,710 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-16 10:53:01,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:01,710 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-16 10:53:01,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:53:01,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:01,711 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:01,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-16 10:53:01,911 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:01,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:01,912 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-16 10:53:01,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:01,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911493928] [2020-10-16 10:53:01,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:02,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911493928] [2020-10-16 10:53:02,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225663926] [2020-10-16 10:53:02,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:02,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 10:53:02,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:02,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:53:02,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:02,142 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:53:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:02,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:02,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:53:02,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198254770] [2020-10-16 10:53:02,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:02,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:02,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:02,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:02,162 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-16 10:53:03,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:03,019 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-16 10:53:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:53:03,019 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:53:03,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:03,020 INFO L225 Difference]: With dead ends: 100 [2020-10-16 10:53:03,020 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 10:53:03,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:53:03,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 10:53:03,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-16 10:53:03,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 10:53:03,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-16 10:53:03,023 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-16 10:53:03,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:03,023 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-16 10:53:03,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-16 10:53:03,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:03,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:03,024 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:03,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-16 10:53:03,224 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:03,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:03,225 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-16 10:53:03,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:03,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599348056] [2020-10-16 10:53:03,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:03,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599348056] [2020-10-16 10:53:03,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383819987] [2020-10-16 10:53:03,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:03,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:03,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:03,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:03,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:03,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:53:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:03,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:03,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:03,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061103852] [2020-10-16 10:53:03,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:03,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:03,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:03,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:03,487 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-16 10:53:04,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:04,420 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-16 10:53:04,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:53:04,421 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:04,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:04,422 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:53:04,422 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 10:53:04,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:53:04,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 10:53:04,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-16 10:53:04,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 10:53:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-16 10:53:04,425 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-16 10:53:04,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:04,425 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-16 10:53:04,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:04,425 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-16 10:53:04,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:04,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:04,425 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:04,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-16 10:53:04,626 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:04,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:04,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-16 10:53:04,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:04,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575701047] [2020-10-16 10:53:04,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:04,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575701047] [2020-10-16 10:53:04,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081305643] [2020-10-16 10:53:04,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:04,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 10:53:04,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:04,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:04,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:04,941 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:04,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:04,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:04,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140927921] [2020-10-16 10:53:04,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:04,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:04,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:04,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:04,943 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-16 10:53:05,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:05,317 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-16 10:53:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:53:05,321 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:05,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:05,321 INFO L225 Difference]: With dead ends: 90 [2020-10-16 10:53:05,321 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 10:53:05,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:53:05,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 10:53:05,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-16 10:53:05,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 10:53:05,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-16 10:53:05,323 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-16 10:53:05,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:05,323 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-16 10:53:05,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:05,323 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-16 10:53:05,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:05,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:05,324 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:05,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:05,527 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:05,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:05,528 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-16 10:53:05,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:05,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080391367] [2020-10-16 10:53:05,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:05,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080391367] [2020-10-16 10:53:05,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722415377] [2020-10-16 10:53:05,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:05,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 10:53:05,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:05,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:05,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:05,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:05,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:05,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:05,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561771883] [2020-10-16 10:53:05,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:05,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:05,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:05,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:05,850 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-16 10:53:06,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:06,301 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-16 10:53:06,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:53:06,302 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:06,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:06,303 INFO L225 Difference]: With dead ends: 106 [2020-10-16 10:53:06,303 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 10:53:06,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:53:06,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 10:53:06,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-16 10:53:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 10:53:06,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-16 10:53:06,307 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-16 10:53:06,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:06,307 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-16 10:53:06,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:06,307 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-16 10:53:06,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:06,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:06,308 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:06,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-16 10:53:06,511 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:06,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:06,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-16 10:53:06,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:06,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899150936] [2020-10-16 10:53:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:06,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899150936] [2020-10-16 10:53:06,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003859752] [2020-10-16 10:53:06,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:06,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:06,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:06,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:06,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:06,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537367284] [2020-10-16 10:53:06,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:06,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:06,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:06,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:06,802 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-16 10:53:07,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:07,280 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-16 10:53:07,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:53:07,281 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:07,281 INFO L225 Difference]: With dead ends: 107 [2020-10-16 10:53:07,282 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 10:53:07,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:53:07,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 10:53:07,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-16 10:53:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 10:53:07,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-16 10:53:07,284 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-16 10:53:07,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:07,284 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-16 10:53:07,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:07,285 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-16 10:53:07,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:07,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:07,285 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:07,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-16 10:53:07,492 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:07,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:07,492 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-16 10:53:07,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:07,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831142244] [2020-10-16 10:53:07,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:07,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831142244] [2020-10-16 10:53:07,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193555322] [2020-10-16 10:53:07,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:07,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:07,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:07,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:07,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:07,795 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:07,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:07,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:07,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465749514] [2020-10-16 10:53:07,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:07,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:07,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:07,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:07,807 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-16 10:53:08,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:08,326 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-16 10:53:08,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:53:08,327 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:08,328 INFO L225 Difference]: With dead ends: 119 [2020-10-16 10:53:08,328 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 10:53:08,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:53:08,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 10:53:08,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-16 10:53:08,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 10:53:08,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-16 10:53:08,330 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-16 10:53:08,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:08,330 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-16 10:53:08,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:08,331 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-16 10:53:08,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:08,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:08,331 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:08,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-16 10:53:08,534 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:08,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:08,534 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-16 10:53:08,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:08,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96028449] [2020-10-16 10:53:08,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:08,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96028449] [2020-10-16 10:53:08,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060226137] [2020-10-16 10:53:08,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:08,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 10:53:08,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:08,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:08,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:08,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:08,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:08,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100838574] [2020-10-16 10:53:08,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:08,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:08,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:08,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:08,816 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-16 10:53:09,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:09,355 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-16 10:53:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:53:09,355 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:09,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:09,356 INFO L225 Difference]: With dead ends: 119 [2020-10-16 10:53:09,356 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 10:53:09,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:53:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 10:53:09,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-16 10:53:09,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:53:09,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-16 10:53:09,359 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-16 10:53:09,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:09,359 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-16 10:53:09,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:09,359 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-16 10:53:09,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:09,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:09,359 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:09,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:09,561 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:09,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:09,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-16 10:53:09,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:09,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997975561] [2020-10-16 10:53:09,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:09,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997975561] [2020-10-16 10:53:09,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32988811] [2020-10-16 10:53:09,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:09,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:09,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:09,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:09,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:09,848 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:09,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:09,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:09,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886806018] [2020-10-16 10:53:09,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:09,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:09,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:09,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:09,863 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-16 10:53:10,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:10,482 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-16 10:53:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:53:10,483 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:10,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:10,484 INFO L225 Difference]: With dead ends: 116 [2020-10-16 10:53:10,484 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 10:53:10,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:53:10,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 10:53:10,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-16 10:53:10,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:53:10,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-16 10:53:10,486 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-16 10:53:10,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:10,487 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-16 10:53:10,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:10,487 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-16 10:53:10,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:10,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:10,487 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:10,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:10,692 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:10,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:10,692 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-16 10:53:10,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:10,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241735287] [2020-10-16 10:53:10,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:10,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241735287] [2020-10-16 10:53:10,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736132958] [2020-10-16 10:53:10,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:10,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 10:53:10,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:10,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:10,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:10,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:10,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:10,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246166049] [2020-10-16 10:53:10,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:10,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:10,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:10,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:10,977 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-16 10:53:11,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:11,570 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-16 10:53:11,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:53:11,571 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:11,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:11,571 INFO L225 Difference]: With dead ends: 117 [2020-10-16 10:53:11,571 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 10:53:11,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:53:11,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 10:53:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-16 10:53:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 10:53:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-16 10:53:11,574 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-16 10:53:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:11,574 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-16 10:53:11,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:11,574 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-16 10:53:11,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:11,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:11,575 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:11,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:11,775 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:11,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:11,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-16 10:53:11,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:11,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396650681] [2020-10-16 10:53:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:12,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396650681] [2020-10-16 10:53:12,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128502919] [2020-10-16 10:53:12,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:12,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 10:53:12,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:12,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:12,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:12,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:12,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:12,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:12,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063789330] [2020-10-16 10:53:12,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:12,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:12,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:12,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:12,135 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-16 10:53:12,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:12,794 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-16 10:53:12,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:53:12,795 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:12,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:12,795 INFO L225 Difference]: With dead ends: 114 [2020-10-16 10:53:12,795 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 10:53:12,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:53:12,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 10:53:12,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-16 10:53:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 10:53:12,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-16 10:53:12,797 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-16 10:53:12,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:12,797 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-16 10:53:12,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:12,797 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-16 10:53:12,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:12,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:12,798 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:13,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-16 10:53:13,005 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:13,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-16 10:53:13,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:13,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069948896] [2020-10-16 10:53:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:13,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069948896] [2020-10-16 10:53:13,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770322363] [2020-10-16 10:53:13,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:13,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:13,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:13,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:13,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:13,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963604145] [2020-10-16 10:53:13,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:13,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:13,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:13,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:13,259 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-16 10:53:13,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:13,892 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-16 10:53:13,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:53:13,893 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:13,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:13,894 INFO L225 Difference]: With dead ends: 115 [2020-10-16 10:53:13,894 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 10:53:13,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:53:13,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 10:53:13,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-16 10:53:13,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 10:53:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-16 10:53:13,897 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-16 10:53:13,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:13,898 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-16 10:53:13,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:13,898 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-16 10:53:13,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:13,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:13,898 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:14,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:14,107 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:14,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:14,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-16 10:53:14,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:14,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818220081] [2020-10-16 10:53:14,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:14,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818220081] [2020-10-16 10:53:14,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665199792] [2020-10-16 10:53:14,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:14,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:14,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:14,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:14,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:14,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:14,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:14,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:14,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076248257] [2020-10-16 10:53:14,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:14,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:14,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:14,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:14,431 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-16 10:53:15,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:15,206 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-16 10:53:15,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:53:15,206 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:15,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:15,207 INFO L225 Difference]: With dead ends: 112 [2020-10-16 10:53:15,207 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 10:53:15,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:53:15,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 10:53:15,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-16 10:53:15,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 10:53:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-16 10:53:15,210 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-16 10:53:15,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:15,210 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-16 10:53:15,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:15,210 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-16 10:53:15,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:15,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:15,210 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:15,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-16 10:53:15,411 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:15,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:15,412 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-16 10:53:15,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:15,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484929774] [2020-10-16 10:53:15,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:15,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484929774] [2020-10-16 10:53:15,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936639192] [2020-10-16 10:53:15,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:15,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 10:53:15,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:15,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:15,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:15,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:15,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:15,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276331954] [2020-10-16 10:53:15,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:15,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:15,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:15,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:15,678 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-16 10:53:16,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:16,375 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-16 10:53:16,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:53:16,375 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:16,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:16,376 INFO L225 Difference]: With dead ends: 113 [2020-10-16 10:53:16,376 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 10:53:16,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 10:53:16,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 10:53:16,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-16 10:53:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:53:16,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:53:16,379 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-16 10:53:16,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:16,379 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:53:16,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:16,380 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:53:16,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:16,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:16,380 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:16,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-16 10:53:16,581 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:16,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:16,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-16 10:53:16,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:16,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457026332] [2020-10-16 10:53:16,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:16,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457026332] [2020-10-16 10:53:16,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115322262] [2020-10-16 10:53:16,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:16,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:16,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:16,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:16,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:16,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:16,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:16,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:16,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17086714] [2020-10-16 10:53:16,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:16,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:16,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:16,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:16,859 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-16 10:53:17,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:17,713 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-16 10:53:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:53:17,714 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:17,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:17,714 INFO L225 Difference]: With dead ends: 110 [2020-10-16 10:53:17,714 INFO L226 Difference]: Without dead ends: 104 [2020-10-16 10:53:17,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 10:53:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-16 10:53:17,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-16 10:53:17,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:53:17,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:53:17,716 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-16 10:53:17,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:17,716 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:53:17,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:17,717 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:53:17,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:17,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:17,717 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:17,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-16 10:53:17,918 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:17,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:17,918 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-16 10:53:17,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:17,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125662994] [2020-10-16 10:53:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:18,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125662994] [2020-10-16 10:53:18,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805697035] [2020-10-16 10:53:18,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:18,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 10:53:18,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:18,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:18,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:18,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:18,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:18,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242348482] [2020-10-16 10:53:18,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:18,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:18,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:18,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:18,172 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-16 10:53:19,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:19,022 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-16 10:53:19,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 10:53:19,023 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:19,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:19,024 INFO L225 Difference]: With dead ends: 111 [2020-10-16 10:53:19,024 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 10:53:19,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:53:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 10:53:19,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-16 10:53:19,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 10:53:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-16 10:53:19,026 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-16 10:53:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:19,026 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-16 10:53:19,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-16 10:53:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:19,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:19,027 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:19,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:19,228 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:19,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:19,228 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-16 10:53:19,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:19,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868013130] [2020-10-16 10:53:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:19,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868013130] [2020-10-16 10:53:19,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786145061] [2020-10-16 10:53:19,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:19,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 10:53:19,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:19,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:19,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:19,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:19,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:19,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:19,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900010987] [2020-10-16 10:53:19,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:19,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:19,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:19,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:19,500 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-16 10:53:20,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:20,446 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-16 10:53:20,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:53:20,447 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:20,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:20,447 INFO L225 Difference]: With dead ends: 108 [2020-10-16 10:53:20,448 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 10:53:20,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:53:20,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 10:53:20,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-16 10:53:20,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 10:53:20,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-16 10:53:20,450 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-16 10:53:20,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:20,450 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-16 10:53:20,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:20,450 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-16 10:53:20,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:20,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:20,451 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:20,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-16 10:53:20,652 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:20,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:20,652 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-16 10:53:20,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:20,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74659064] [2020-10-16 10:53:20,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:20,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74659064] [2020-10-16 10:53:20,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560703215] [2020-10-16 10:53:20,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:20,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:20,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:20,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:20,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:20,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372138777] [2020-10-16 10:53:20,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:20,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:20,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:20,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:20,908 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-16 10:53:21,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:21,714 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-16 10:53:21,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:53:21,715 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:21,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:21,716 INFO L225 Difference]: With dead ends: 128 [2020-10-16 10:53:21,716 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 10:53:21,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 10:53:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 10:53:21,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-16 10:53:21,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 10:53:21,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-16 10:53:21,719 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-16 10:53:21,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:21,719 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-16 10:53:21,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:21,719 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-16 10:53:21,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:21,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:21,719 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:21,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:21,920 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:21,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:21,921 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-16 10:53:21,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:21,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975862327] [2020-10-16 10:53:21,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:22,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975862327] [2020-10-16 10:53:22,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441545037] [2020-10-16 10:53:22,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:22,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:22,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:22,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:22,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:22,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:22,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:22,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640880690] [2020-10-16 10:53:22,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:22,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:22,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:22,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:22,202 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-16 10:53:23,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:23,171 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-16 10:53:23,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 10:53:23,172 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:23,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:23,172 INFO L225 Difference]: With dead ends: 109 [2020-10-16 10:53:23,173 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 10:53:23,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=733, Invalid=1817, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 10:53:23,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 10:53:23,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-16 10:53:23,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 10:53:23,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-16 10:53:23,175 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-16 10:53:23,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:23,175 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-16 10:53:23,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:23,175 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-16 10:53:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:23,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:23,175 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:23,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:23,376 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:23,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:23,377 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-16 10:53:23,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:23,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896686370] [2020-10-16 10:53:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:23,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896686370] [2020-10-16 10:53:23,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5834952] [2020-10-16 10:53:23,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:23,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 10:53:23,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:23,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:23,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:23,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:23,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:23,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81021018] [2020-10-16 10:53:23,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:23,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:23,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:23,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:23,706 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-16 10:53:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:24,170 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-16 10:53:24,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:53:24,171 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:24,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:24,172 INFO L225 Difference]: With dead ends: 124 [2020-10-16 10:53:24,172 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 10:53:24,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:53:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 10:53:24,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-16 10:53:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:24,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:24,174 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:24,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:24,174 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:24,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:24,178 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:24,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:24,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:24,179 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:24,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:24,385 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:24,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:24,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-16 10:53:24,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:24,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510449064] [2020-10-16 10:53:24,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:24,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510449064] [2020-10-16 10:53:24,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220836449] [2020-10-16 10:53:24,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:24,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:24,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:24,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:24,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:24,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:24,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:24,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:24,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037661204] [2020-10-16 10:53:24,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:24,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:24,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:24,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:24,754 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:25,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:25,314 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-16 10:53:25,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:53:25,315 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:25,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:25,316 INFO L225 Difference]: With dead ends: 121 [2020-10-16 10:53:25,316 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 10:53:25,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:53:25,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 10:53:25,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-16 10:53:25,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:25,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:25,318 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:25,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:25,319 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:25,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:25,319 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:25,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:25,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:25,319 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:25,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:25,520 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:25,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:25,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-16 10:53:25,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:25,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443458218] [2020-10-16 10:53:25,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:25,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443458218] [2020-10-16 10:53:25,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915834398] [2020-10-16 10:53:25,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:25,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 10:53:25,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:25,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:25,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:25,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:25,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:25,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503512555] [2020-10-16 10:53:25,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:25,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:25,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:25,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:25,831 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:26,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:26,349 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-16 10:53:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:53:26,350 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:26,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:26,350 INFO L225 Difference]: With dead ends: 118 [2020-10-16 10:53:26,350 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 10:53:26,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:53:26,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 10:53:26,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-16 10:53:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:26,353 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:26,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:26,353 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:26,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:26,353 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:26,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:26,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:26,354 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:26,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:26,555 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:26,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:26,555 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-16 10:53:26,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:26,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251127083] [2020-10-16 10:53:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:26,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251127083] [2020-10-16 10:53:26,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446936954] [2020-10-16 10:53:26,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:26,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 10:53:26,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:26,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:26,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:26,873 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:26,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:26,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:26,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794737850] [2020-10-16 10:53:26,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:26,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:26,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:26,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:26,888 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:27,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:27,509 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-16 10:53:27,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:53:27,510 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:27,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:27,510 INFO L225 Difference]: With dead ends: 117 [2020-10-16 10:53:27,511 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 10:53:27,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:53:27,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 10:53:27,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-16 10:53:27,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:27,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:27,513 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:27,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:27,513 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:27,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:27,513 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:27,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:27,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:27,514 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:27,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-16 10:53:27,715 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:27,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:27,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-16 10:53:27,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:27,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514931864] [2020-10-16 10:53:27,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:27,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514931864] [2020-10-16 10:53:27,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307603736] [2020-10-16 10:53:27,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:28,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:28,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:28,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:28,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:28,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753725830] [2020-10-16 10:53:28,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:28,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:28,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:28,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:28,019 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:28,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:28,615 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-16 10:53:28,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:53:28,616 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:28,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:28,617 INFO L225 Difference]: With dead ends: 114 [2020-10-16 10:53:28,617 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 10:53:28,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:53:28,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 10:53:28,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-16 10:53:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:28,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:28,619 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:28,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:28,619 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:28,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:28,619 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:28,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:28,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:28,620 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:28,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-16 10:53:28,824 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:28,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:28,824 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-16 10:53:28,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:28,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615474669] [2020-10-16 10:53:28,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:28,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:29,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615474669] [2020-10-16 10:53:29,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414583621] [2020-10-16 10:53:29,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:29,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:29,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:29,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:29,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:29,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:29,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:29,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:29,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620228729] [2020-10-16 10:53:29,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:29,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:29,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:29,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:29,159 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:29,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:29,887 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-16 10:53:29,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:53:29,888 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:29,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:29,888 INFO L225 Difference]: With dead ends: 113 [2020-10-16 10:53:29,888 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 10:53:29,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:53:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 10:53:29,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-16 10:53:29,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:29,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:29,890 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:29,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:29,891 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:29,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:29,891 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:29,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:29,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:29,891 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:30,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-16 10:53:30,096 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:30,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:30,097 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-16 10:53:30,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:30,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364322955] [2020-10-16 10:53:30,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:30,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364322955] [2020-10-16 10:53:30,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345026613] [2020-10-16 10:53:30,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:30,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 10:53:30,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:30,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:30,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:30,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:30,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:30,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043894610] [2020-10-16 10:53:30,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:30,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:30,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:30,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:30,409 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:31,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:31,074 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-16 10:53:31,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:53:31,075 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:31,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:31,076 INFO L225 Difference]: With dead ends: 110 [2020-10-16 10:53:31,076 INFO L226 Difference]: Without dead ends: 104 [2020-10-16 10:53:31,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:53:31,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-16 10:53:31,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-16 10:53:31,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:31,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:31,078 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:31,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:31,079 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:31,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:31,079 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:31,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:31,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:31,079 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:31,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-16 10:53:31,287 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:31,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:31,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-16 10:53:31,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:31,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378991298] [2020-10-16 10:53:31,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:31,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378991298] [2020-10-16 10:53:31,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058134411] [2020-10-16 10:53:31,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:31,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:31,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:31,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:31,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:31,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:31,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:31,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:31,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460243933] [2020-10-16 10:53:31,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:31,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:31,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:31,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:31,595 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:32,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:32,421 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-16 10:53:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:53:32,421 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:32,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:32,422 INFO L225 Difference]: With dead ends: 109 [2020-10-16 10:53:32,422 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 10:53:32,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 10:53:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 10:53:32,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-16 10:53:32,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:32,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:32,424 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:32,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:32,425 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:32,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:32,425 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:32,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:32,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:32,425 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:32,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:32,626 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:32,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:32,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-16 10:53:32,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:32,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501941501] [2020-10-16 10:53:32,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:32,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501941501] [2020-10-16 10:53:32,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071908968] [2020-10-16 10:53:32,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:32,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 10:53:32,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:32,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:32,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:32,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:32,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:32,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954056051] [2020-10-16 10:53:32,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:32,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:32,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:32,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:32,916 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:33,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:33,641 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-16 10:53:33,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:53:33,642 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:33,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:33,643 INFO L225 Difference]: With dead ends: 106 [2020-10-16 10:53:33,643 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 10:53:33,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:53:33,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 10:53:33,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-16 10:53:33,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:33,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:33,646 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:33,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:33,646 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:33,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:33,646 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:33,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:33,647 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:33,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-16 10:53:33,847 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:33,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:33,848 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-16 10:53:33,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:33,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102887912] [2020-10-16 10:53:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:34,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102887912] [2020-10-16 10:53:34,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837912160] [2020-10-16 10:53:34,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:34,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 10:53:34,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:34,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:34,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:34,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:34,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:34,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:34,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813249175] [2020-10-16 10:53:34,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:34,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:34,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:34,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:34,162 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:35,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:35,087 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-16 10:53:35,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:53:35,088 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:35,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:35,088 INFO L225 Difference]: With dead ends: 105 [2020-10-16 10:53:35,088 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 10:53:35,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:53:35,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 10:53:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-16 10:53:35,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:35,090 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:35,091 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:35,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:35,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:35,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:35,091 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:35,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:35,292 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:35,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:35,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-16 10:53:35,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:35,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127351779] [2020-10-16 10:53:35,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:35,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127351779] [2020-10-16 10:53:35,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146687370] [2020-10-16 10:53:35,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:35,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:35,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:35,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:35,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:35,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814949061] [2020-10-16 10:53:35,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:35,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:35,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:35,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:35,585 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:36,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:36,358 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-16 10:53:36,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:53:36,359 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:36,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:36,360 INFO L225 Difference]: With dead ends: 102 [2020-10-16 10:53:36,360 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 10:53:36,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 10:53:36,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 10:53:36,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-16 10:53:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:36,362 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:36,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:36,363 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:36,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:36,363 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:36,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:36,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:36,364 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:36,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:36,564 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:36,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:36,565 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-16 10:53:36,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:36,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560603003] [2020-10-16 10:53:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:36,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560603003] [2020-10-16 10:53:36,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534688631] [2020-10-16 10:53:36,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:36,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:36,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:36,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:36,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:36,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:36,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:36,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:36,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567902152] [2020-10-16 10:53:36,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:36,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:36,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:36,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:36,873 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:37,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:37,909 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-16 10:53:37,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:53:37,910 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:37,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:37,911 INFO L225 Difference]: With dead ends: 101 [2020-10-16 10:53:37,911 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 10:53:37,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 10:53:37,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 10:53:37,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-16 10:53:37,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:37,913 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:37,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:37,913 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:37,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:37,914 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:37,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:37,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:37,914 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:38,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-16 10:53:38,116 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:38,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:38,116 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-16 10:53:38,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:38,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414120283] [2020-10-16 10:53:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:38,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414120283] [2020-10-16 10:53:38,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292011257] [2020-10-16 10:53:38,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:38,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 10:53:38,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:38,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:38,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:38,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:38,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:38,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571327929] [2020-10-16 10:53:38,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:38,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:38,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:38,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:38,397 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:39,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:39,250 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-16 10:53:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 10:53:39,251 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:39,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:39,252 INFO L225 Difference]: With dead ends: 98 [2020-10-16 10:53:39,252 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 10:53:39,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:53:39,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 10:53:39,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-16 10:53:39,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:39,254 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:39,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:39,254 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:39,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:39,254 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:39,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:39,255 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:39,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:39,455 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:39,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:39,456 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-16 10:53:39,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:39,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377355337] [2020-10-16 10:53:39,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:39,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377355337] [2020-10-16 10:53:39,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347986043] [2020-10-16 10:53:39,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:39,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:39,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:39,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:39,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:39,744 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:39,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:39,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:39,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306564535] [2020-10-16 10:53:39,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:39,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:39,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:39,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:39,762 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:40,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:40,882 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-16 10:53:40,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 10:53:40,883 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:40,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:40,883 INFO L225 Difference]: With dead ends: 97 [2020-10-16 10:53:40,883 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 10:53:40,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 10:53:40,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 10:53:40,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-16 10:53:40,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:40,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:40,885 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:40,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:40,886 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:40,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:40,886 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:40,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:40,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:40,886 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:41,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-16 10:53:41,087 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:41,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:41,087 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-16 10:53:41,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:41,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624681983] [2020-10-16 10:53:41,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:41,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624681983] [2020-10-16 10:53:41,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649822785] [2020-10-16 10:53:41,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:41,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 10:53:41,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:41,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:41,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:41,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:41,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:41,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895138229] [2020-10-16 10:53:41,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:41,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:41,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:41,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:41,367 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:42,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:42,283 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-16 10:53:42,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:53:42,284 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:42,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:42,284 INFO L225 Difference]: With dead ends: 113 [2020-10-16 10:53:42,284 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 10:53:42,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 10:53:42,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 10:53:42,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-16 10:53:42,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 10:53:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-16 10:53:42,287 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-16 10:53:42,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:42,287 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-16 10:53:42,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:42,288 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-16 10:53:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:42,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:42,288 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:42,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-16 10:53:42,489 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:42,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:42,489 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-16 10:53:42,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:42,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294192031] [2020-10-16 10:53:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:42,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294192031] [2020-10-16 10:53:42,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139461382] [2020-10-16 10:53:42,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:42,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 10:53:42,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:42,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:42,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:42,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:42,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:42,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:42,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419152130] [2020-10-16 10:53:42,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:42,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:42,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:42,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:42,799 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-16 10:53:44,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:44,001 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-10-16 10:53:44,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 10:53:44,001 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:44,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:44,002 INFO L225 Difference]: With dead ends: 94 [2020-10-16 10:53:44,002 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 10:53:44,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 10:53:44,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 10:53:44,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-10-16 10:53:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 10:53:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-16 10:53:44,004 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-16 10:53:44,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:44,004 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-16 10:53:44,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:44,005 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-16 10:53:44,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:44,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:44,005 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:44,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-16 10:53:44,206 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:44,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:44,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-16 10:53:44,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:44,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594066818] [2020-10-16 10:53:44,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:44,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594066818] [2020-10-16 10:53:44,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131885698] [2020-10-16 10:53:44,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:44,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:44,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:44,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:53:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:44,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:44,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:44,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587071586] [2020-10-16 10:53:44,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:44,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:44,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:44,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:44,487 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-16 10:53:45,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:45,580 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-16 10:53:45,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:53:45,581 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:45,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:45,582 INFO L225 Difference]: With dead ends: 108 [2020-10-16 10:53:45,582 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 10:53:45,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 10:53:45,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 10:53:45,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-16 10:53:45,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 10:53:45,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-16 10:53:45,584 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-16 10:53:45,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:45,585 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-16 10:53:45,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:45,585 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-16 10:53:45,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:45,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:45,585 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:45,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-16 10:53:45,786 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:45,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:45,786 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-16 10:53:45,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:45,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342372834] [2020-10-16 10:53:45,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:46,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342372834] [2020-10-16 10:53:46,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407266340] [2020-10-16 10:53:46,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:46,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:46,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:46,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:46,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:46,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:53:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:46,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:46,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:46,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773808792] [2020-10-16 10:53:46,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:46,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:46,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:46,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:46,119 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-16 10:53:47,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:47,282 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-16 10:53:47,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:53:47,282 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:47,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:47,283 INFO L225 Difference]: With dead ends: 90 [2020-10-16 10:53:47,283 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 10:53:47,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 10:53:47,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 10:53:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-16 10:53:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:53:47,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-16 10:53:47,285 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-16 10:53:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:47,285 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-16 10:53:47,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:47,285 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-16 10:53:47,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:47,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:47,285 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:47,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:47,486 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:47,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:47,486 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-16 10:53:47,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:47,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481231380] [2020-10-16 10:53:47,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:47,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481231380] [2020-10-16 10:53:47,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961000682] [2020-10-16 10:53:47,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:47,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:53:47,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:47,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:47,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:47,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:47,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:53:47,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924175758] [2020-10-16 10:53:47,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:47,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:47,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:47,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:47,865 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-16 10:53:48,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:48,352 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-16 10:53:48,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:53:48,353 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:53:48,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:48,353 INFO L225 Difference]: With dead ends: 96 [2020-10-16 10:53:48,353 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 10:53:48,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 10:53:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 10:53:48,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-16 10:53:48,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 10:53:48,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-16 10:53:48,356 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-16 10:53:48,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:48,356 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-16 10:53:48,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:48,356 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-16 10:53:48,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:48,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:48,356 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:48,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:48,557 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:48,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:48,558 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-16 10:53:48,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:48,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812642741] [2020-10-16 10:53:48,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:48,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812642741] [2020-10-16 10:53:48,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126383065] [2020-10-16 10:53:48,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:48,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:48,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:48,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:48,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:48,937 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:48,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:48,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:48,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269829217] [2020-10-16 10:53:48,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:48,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:48,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:48,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:48,950 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-16 10:53:49,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:49,511 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-16 10:53:49,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:53:49,512 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:49,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:49,513 INFO L225 Difference]: With dead ends: 114 [2020-10-16 10:53:49,513 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 10:53:49,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:53:49,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 10:53:49,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-16 10:53:49,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:53:49,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-16 10:53:49,516 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-16 10:53:49,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:49,516 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-16 10:53:49,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:49,516 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-16 10:53:49,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:49,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:49,516 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:49,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:49,717 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:49,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:49,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-16 10:53:49,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:49,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905247370] [2020-10-16 10:53:49,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:50,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905247370] [2020-10-16 10:53:50,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869971432] [2020-10-16 10:53:50,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:50,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 10:53:50,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:50,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:50,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:50,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:50,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:53:50,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20476681] [2020-10-16 10:53:50,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:50,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:50,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:50,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:50,085 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-16 10:53:50,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:50,678 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-16 10:53:50,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:53:50,678 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:53:50,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:50,679 INFO L225 Difference]: With dead ends: 115 [2020-10-16 10:53:50,679 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 10:53:50,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:53:50,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 10:53:50,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-16 10:53:50,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 10:53:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-16 10:53:50,681 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-16 10:53:50,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:50,681 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-16 10:53:50,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:50,681 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-16 10:53:50,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:50,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:50,681 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:50,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:50,882 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:50,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:50,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-16 10:53:50,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:50,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687919171] [2020-10-16 10:53:50,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:51,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687919171] [2020-10-16 10:53:51,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107892476] [2020-10-16 10:53:51,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:51,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 10:53:51,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:51,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:51,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:51,272 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:51,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:51,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:51,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171166843] [2020-10-16 10:53:51,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:51,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:51,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:51,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:51,284 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-16 10:53:51,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:51,925 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-16 10:53:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:53:51,926 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:51,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:51,927 INFO L225 Difference]: With dead ends: 129 [2020-10-16 10:53:51,927 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 10:53:51,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:53:51,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 10:53:51,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-16 10:53:51,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 10:53:51,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-16 10:53:51,930 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-16 10:53:51,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:51,930 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-16 10:53:51,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:51,930 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-16 10:53:51,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:51,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:51,931 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:52,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:52,139 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:52,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:52,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-16 10:53:52,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:52,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113732919] [2020-10-16 10:53:52,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:52,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113732919] [2020-10-16 10:53:52,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918062840] [2020-10-16 10:53:52,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:52,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:52,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:52,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:52,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:53:52,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810701508] [2020-10-16 10:53:52,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:52,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:52,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:52,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:52,483 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-16 10:53:53,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:53,131 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-16 10:53:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:53:53,131 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:53:53,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:53,132 INFO L225 Difference]: With dead ends: 129 [2020-10-16 10:53:53,132 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 10:53:53,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:53:53,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 10:53:53,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-16 10:53:53,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 10:53:53,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-16 10:53:53,134 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-16 10:53:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:53,135 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-16 10:53:53,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:53,135 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-16 10:53:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:53,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:53,135 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:53,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:53,336 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:53,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:53,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-16 10:53:53,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:53,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751031535] [2020-10-16 10:53:53,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:53,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751031535] [2020-10-16 10:53:53,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511396003] [2020-10-16 10:53:53,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:53,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:53,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:53,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:53,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:53,699 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:53,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:53,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:53,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455830260] [2020-10-16 10:53:53,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:53,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:53,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:53,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:53,713 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-16 10:53:54,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:54,463 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-16 10:53:54,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:53:54,464 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:54,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:54,464 INFO L225 Difference]: With dead ends: 126 [2020-10-16 10:53:54,464 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 10:53:54,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:53:54,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 10:53:54,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-16 10:53:54,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 10:53:54,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-16 10:53:54,467 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-16 10:53:54,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:54,467 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-16 10:53:54,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:54,468 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-16 10:53:54,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:54,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:54,468 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:54,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:54,669 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:54,670 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-16 10:53:54,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:54,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975636614] [2020-10-16 10:53:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:54,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975636614] [2020-10-16 10:53:54,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378016721] [2020-10-16 10:53:54,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:54,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:53:54,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:54,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:54,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:54,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:54,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:53:54,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658145704] [2020-10-16 10:53:54,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:54,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:54,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:54,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:54,996 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-16 10:53:55,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:55,718 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-16 10:53:55,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:53:55,719 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:53:55,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:55,719 INFO L225 Difference]: With dead ends: 127 [2020-10-16 10:53:55,719 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 10:53:55,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 10:53:55,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 10:53:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-16 10:53:55,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:53:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-16 10:53:55,722 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-16 10:53:55,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:55,722 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-16 10:53:55,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-16 10:53:55,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:55,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:55,723 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:55,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-16 10:53:55,924 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:55,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:55,925 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-16 10:53:55,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:55,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539690459] [2020-10-16 10:53:55,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:56,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539690459] [2020-10-16 10:53:56,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093697913] [2020-10-16 10:53:56,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:56,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:56,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:56,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:56,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:56,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:56,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:56,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:56,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466564501] [2020-10-16 10:53:56,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:56,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:56,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:56,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:56,285 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-16 10:53:57,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:57,100 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-16 10:53:57,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:53:57,101 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:57,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:57,101 INFO L225 Difference]: With dead ends: 124 [2020-10-16 10:53:57,101 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 10:53:57,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 10:53:57,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 10:53:57,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-16 10:53:57,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:53:57,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-16 10:53:57,104 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-16 10:53:57,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:57,104 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-16 10:53:57,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:57,104 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-16 10:53:57,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:57,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:57,104 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:57,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-16 10:53:57,305 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:57,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:57,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-16 10:53:57,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:57,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091456227] [2020-10-16 10:53:57,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:57,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091456227] [2020-10-16 10:53:57,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108650066] [2020-10-16 10:53:57,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:57,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 10:53:57,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:57,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:57,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:57,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:57,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:53:57,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986224176] [2020-10-16 10:53:57,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:57,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:57,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:57,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:57,644 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-16 10:53:58,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:58,432 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-16 10:53:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:53:58,433 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:53:58,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:58,434 INFO L225 Difference]: With dead ends: 125 [2020-10-16 10:53:58,434 INFO L226 Difference]: Without dead ends: 119 [2020-10-16 10:53:58,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:53:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-16 10:53:58,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-16 10:53:58,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 10:53:58,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-16 10:53:58,437 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-16 10:53:58,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:58,437 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-16 10:53:58,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:58,437 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-16 10:53:58,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:58,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:58,437 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:58,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-16 10:53:58,638 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:58,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:58,638 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-16 10:53:58,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:58,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901579639] [2020-10-16 10:53:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:58,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901579639] [2020-10-16 10:53:58,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218720290] [2020-10-16 10:53:58,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:58,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 10:53:58,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:58,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:58,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:58,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:58,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:58,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:58,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508395762] [2020-10-16 10:53:58,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:58,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:58,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:58,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:58,992 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-16 10:53:59,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:59,920 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-16 10:53:59,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:53:59,921 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:59,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:59,921 INFO L225 Difference]: With dead ends: 122 [2020-10-16 10:53:59,921 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 10:53:59,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:53:59,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 10:53:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-16 10:53:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 10:53:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-16 10:53:59,924 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-16 10:53:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:59,924 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-16 10:53:59,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-16 10:53:59,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:59,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:59,925 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:00,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-16 10:54:00,125 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:00,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:00,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-16 10:54:00,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:00,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183046629] [2020-10-16 10:54:00,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:00,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183046629] [2020-10-16 10:54:00,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531355076] [2020-10-16 10:54:00,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:00,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:54:00,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:00,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:00,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:54:00,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37718277] [2020-10-16 10:54:00,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:54:00,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:00,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:54:00,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:54:00,441 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-16 10:54:01,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:01,272 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-16 10:54:01,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 10:54:01,273 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:54:01,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:01,273 INFO L225 Difference]: With dead ends: 123 [2020-10-16 10:54:01,273 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 10:54:01,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 10:54:01,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 10:54:01,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-16 10:54:01,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 10:54:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-16 10:54:01,275 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-16 10:54:01,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:01,276 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-16 10:54:01,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:54:01,276 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-16 10:54:01,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:54:01,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:01,276 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:01,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:01,477 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:01,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:01,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-16 10:54:01,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:01,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991266201] [2020-10-16 10:54:01,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:01,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991266201] [2020-10-16 10:54:01,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042674015] [2020-10-16 10:54:01,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:01,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:01,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:01,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:54:01,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:01,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:01,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:01,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:54:01,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361593273] [2020-10-16 10:54:01,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:01,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:01,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:01,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:01,838 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-16 10:54:02,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:02,851 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-16 10:54:02,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:54:02,852 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:54:02,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:02,852 INFO L225 Difference]: With dead ends: 120 [2020-10-16 10:54:02,852 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 10:54:02,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 10:54:02,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 10:54:02,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-16 10:54:02,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 10:54:02,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-16 10:54:02,854 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-16 10:54:02,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:02,854 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-16 10:54:02,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:02,854 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-16 10:54:02,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:54:02,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:02,855 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:03,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:03,056 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:03,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:03,056 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-16 10:54:03,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:03,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603080619] [2020-10-16 10:54:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:03,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603080619] [2020-10-16 10:54:03,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432247207] [2020-10-16 10:54:03,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:03,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:54:03,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:03,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:54:03,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:03,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:03,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:54:03,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551263949] [2020-10-16 10:54:03,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:54:03,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:03,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:54:03,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:54:03,366 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-16 10:54:04,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:04,292 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-16 10:54:04,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:54:04,293 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:54:04,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:04,293 INFO L225 Difference]: With dead ends: 121 [2020-10-16 10:54:04,293 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 10:54:04,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 10:54:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 10:54:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-16 10:54:04,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:54:04,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:54:04,296 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-16 10:54:04,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:04,297 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:54:04,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:54:04,297 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:54:04,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:54:04,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:04,297 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:04,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-16 10:54:04,498 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:04,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:04,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-16 10:54:04,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:04,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791748354] [2020-10-16 10:54:04,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:04,748 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:04,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791748354] [2020-10-16 10:54:04,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069402173] [2020-10-16 10:54:04,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:04,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:04,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:04,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:54:04,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:04,828 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:04,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:04,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:54:04,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429992503] [2020-10-16 10:54:04,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:04,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:04,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:04,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:04,857 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-16 10:54:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:06,023 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-16 10:54:06,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 10:54:06,024 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:54:06,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:06,024 INFO L225 Difference]: With dead ends: 118 [2020-10-16 10:54:06,024 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 10:54:06,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 10:54:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 10:54:06,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-16 10:54:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:54:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:54:06,032 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-16 10:54:06,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:06,032 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:54:06,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:06,032 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:54:06,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:54:06,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:06,033 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:06,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:06,233 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:06,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:06,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-16 10:54:06,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:06,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021832055] [2020-10-16 10:54:06,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:06,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021832055] [2020-10-16 10:54:06,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927224734] [2020-10-16 10:54:06,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:06,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 10:54:06,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:06,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:54:06,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:06,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:06,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:54:06,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604126053] [2020-10-16 10:54:06,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:54:06,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:06,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:54:06,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:54:06,545 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-16 10:54:07,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:07,543 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-16 10:54:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 10:54:07,544 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:54:07,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:07,545 INFO L225 Difference]: With dead ends: 119 [2020-10-16 10:54:07,546 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 10:54:07,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 10:54:07,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 10:54:07,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-16 10:54:07,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 10:54:07,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-16 10:54:07,549 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-16 10:54:07,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:07,549 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-16 10:54:07,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:54:07,549 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-16 10:54:07,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:54:07,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:07,550 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:07,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:07,758 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:07,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:07,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-16 10:54:07,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:07,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149545516] [2020-10-16 10:54:07,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:07,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149545516] [2020-10-16 10:54:07,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742903757] [2020-10-16 10:54:07,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:08,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 10:54:08,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:08,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:54:08,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:08,077 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:08,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:08,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:54:08,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862825162] [2020-10-16 10:54:08,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:08,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:08,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:08,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:08,096 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-16 10:54:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:09,318 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-16 10:54:09,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 10:54:09,318 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:54:09,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:09,319 INFO L225 Difference]: With dead ends: 116 [2020-10-16 10:54:09,319 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 10:54:09,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 10:54:09,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 10:54:09,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-16 10:54:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 10:54:09,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-16 10:54:09,322 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-16 10:54:09,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:09,323 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-16 10:54:09,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:09,323 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-16 10:54:09,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:54:09,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:09,323 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:09,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:09,526 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:09,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:09,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-16 10:54:09,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:09,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228524448] [2020-10-16 10:54:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:09,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228524448] [2020-10-16 10:54:09,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882260426] [2020-10-16 10:54:09,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:09,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:54:09,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:09,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:09,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:54:09,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705557169] [2020-10-16 10:54:09,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:54:09,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:09,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:54:09,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:54:09,840 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-16 10:54:10,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:10,896 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-16 10:54:10,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 10:54:10,897 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:54:10,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:10,898 INFO L225 Difference]: With dead ends: 136 [2020-10-16 10:54:10,898 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 10:54:10,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 10:54:10,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 10:54:10,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-16 10:54:10,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 10:54:10,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-16 10:54:10,902 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-16 10:54:10,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:10,902 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-16 10:54:10,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:54:10,902 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-16 10:54:10,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:54:10,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:10,903 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:11,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:11,110 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:11,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:11,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-16 10:54:11,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:11,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117501762] [2020-10-16 10:54:11,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:11,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117501762] [2020-10-16 10:54:11,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040644685] [2020-10-16 10:54:11,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:11,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:11,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:11,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:54:11,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:11,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:11,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:11,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:54:11,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67342161] [2020-10-16 10:54:11,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:11,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:11,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:11,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:11,430 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-16 10:54:12,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:12,703 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-16 10:54:12,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 10:54:12,704 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:54:12,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:12,704 INFO L225 Difference]: With dead ends: 117 [2020-10-16 10:54:12,704 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 10:54:12,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 10:54:12,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 10:54:12,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-16 10:54:12,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 10:54:12,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-16 10:54:12,707 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-16 10:54:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:12,707 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-16 10:54:12,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:12,707 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-16 10:54:12,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:12,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:12,708 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:12,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:12,909 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:12,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:12,909 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-16 10:54:12,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:12,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796907882] [2020-10-16 10:54:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:13,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796907882] [2020-10-16 10:54:13,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412771435] [2020-10-16 10:54:13,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:13,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:54:13,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:13,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:13,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:13,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:13,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:13,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680872326] [2020-10-16 10:54:13,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:13,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:13,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:13,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:13,314 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-16 10:54:13,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:13,875 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-16 10:54:13,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:54:13,876 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:13,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:13,877 INFO L225 Difference]: With dead ends: 134 [2020-10-16 10:54:13,877 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 10:54:13,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:54:13,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 10:54:13,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-16 10:54:13,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:13,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:13,879 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:13,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:13,880 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:13,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:13,880 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:13,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:13,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:13,880 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:14,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-16 10:54:14,081 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:14,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:14,081 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-16 10:54:14,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:14,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155558237] [2020-10-16 10:54:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:14,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155558237] [2020-10-16 10:54:14,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348127825] [2020-10-16 10:54:14,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:14,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:14,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:14,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:14,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:14,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:14,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:14,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:14,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258617132] [2020-10-16 10:54:14,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:14,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:14,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:14,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:14,531 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:15,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:15,216 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-16 10:54:15,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:54:15,217 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:15,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:15,217 INFO L225 Difference]: With dead ends: 131 [2020-10-16 10:54:15,218 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 10:54:15,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:54:15,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 10:54:15,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-16 10:54:15,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:15,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:15,220 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:15,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:15,221 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:15,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:15,221 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:15,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:15,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:15,221 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:15,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-16 10:54:15,422 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:15,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:15,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-16 10:54:15,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:15,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014765209] [2020-10-16 10:54:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:15,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014765209] [2020-10-16 10:54:15,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951659053] [2020-10-16 10:54:15,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:15,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 10:54:15,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:15,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:15,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:15,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:15,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:15,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114210237] [2020-10-16 10:54:15,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:15,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:15,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:15,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:15,828 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:16,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:16,498 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-16 10:54:16,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:54:16,499 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:16,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:16,500 INFO L225 Difference]: With dead ends: 128 [2020-10-16 10:54:16,500 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 10:54:16,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:54:16,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 10:54:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-16 10:54:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:16,502 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:16,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:16,502 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:16,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:16,502 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:16,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:16,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:16,503 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:16,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:16,704 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:16,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:16,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-16 10:54:16,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:16,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575002708] [2020-10-16 10:54:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:17,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575002708] [2020-10-16 10:54:17,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584749909] [2020-10-16 10:54:17,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:17,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 10:54:17,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:17,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:17,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:17,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:17,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:17,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:17,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068522932] [2020-10-16 10:54:17,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:17,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:17,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:17,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:17,137 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:17,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:17,903 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-16 10:54:17,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:54:17,904 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:17,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:17,905 INFO L225 Difference]: With dead ends: 127 [2020-10-16 10:54:17,905 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 10:54:17,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 10:54:17,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 10:54:17,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-16 10:54:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:17,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:17,907 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:17,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:17,907 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:17,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:17,907 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:17,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:17,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:17,907 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:18,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-16 10:54:18,108 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:18,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:18,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-16 10:54:18,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:18,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000742270] [2020-10-16 10:54:18,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:18,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000742270] [2020-10-16 10:54:18,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714139213] [2020-10-16 10:54:18,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:18,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:18,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:18,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:18,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:18,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706640607] [2020-10-16 10:54:18,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:18,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:18,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:18,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:18,486 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:19,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:19,218 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-16 10:54:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:54:19,219 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:19,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:19,219 INFO L225 Difference]: With dead ends: 124 [2020-10-16 10:54:19,220 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 10:54:19,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:54:19,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 10:54:19,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-16 10:54:19,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:19,222 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:19,222 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:19,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:19,223 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:19,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:19,223 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:19,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:19,424 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:19,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:19,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-16 10:54:19,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:19,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259770917] [2020-10-16 10:54:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:19,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259770917] [2020-10-16 10:54:19,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356053830] [2020-10-16 10:54:19,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:19,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:19,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:19,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:19,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:19,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:19,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:19,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:19,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447712373] [2020-10-16 10:54:19,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:19,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:19,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:19,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:19,815 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:20,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:20,711 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-16 10:54:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:54:20,712 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:20,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:20,713 INFO L225 Difference]: With dead ends: 123 [2020-10-16 10:54:20,713 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 10:54:20,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:54:20,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 10:54:20,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-16 10:54:20,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:20,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:20,717 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:20,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:20,717 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:20,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:20,717 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:20,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:20,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:20,718 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:20,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:20,924 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:20,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:20,924 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-16 10:54:20,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:20,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608522275] [2020-10-16 10:54:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:21,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608522275] [2020-10-16 10:54:21,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661432436] [2020-10-16 10:54:21,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:21,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:54:21,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:21,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:21,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:21,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:21,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:21,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220964917] [2020-10-16 10:54:21,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:21,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:21,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:21,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:21,298 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:22,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:22,089 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-16 10:54:22,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:54:22,090 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:22,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:22,090 INFO L225 Difference]: With dead ends: 120 [2020-10-16 10:54:22,090 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 10:54:22,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 10:54:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 10:54:22,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-16 10:54:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:22,093 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:22,093 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:22,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:22,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:22,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:22,094 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:22,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:22,295 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:22,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:22,295 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-16 10:54:22,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:22,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179420093] [2020-10-16 10:54:22,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:22,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179420093] [2020-10-16 10:54:22,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120944605] [2020-10-16 10:54:22,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:22,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:22,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:22,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:22,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:22,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:22,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:22,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:22,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166122525] [2020-10-16 10:54:22,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:22,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:22,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:22,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:22,692 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:23,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:23,725 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-16 10:54:23,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:54:23,726 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:23,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:23,726 INFO L225 Difference]: With dead ends: 119 [2020-10-16 10:54:23,727 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 10:54:23,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 10:54:23,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 10:54:23,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-16 10:54:23,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:23,729 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:23,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:23,730 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:23,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:23,730 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:23,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:23,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:23,730 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:23,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:23,931 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:23,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:23,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-16 10:54:23,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:23,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694028292] [2020-10-16 10:54:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:24,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694028292] [2020-10-16 10:54:24,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364075015] [2020-10-16 10:54:24,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:24,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 10:54:24,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:24,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:24,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:24,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:24,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:24,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127701256] [2020-10-16 10:54:24,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:24,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:24,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:24,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:24,283 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:25,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:25,169 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-16 10:54:25,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:54:25,170 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:25,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:25,170 INFO L225 Difference]: With dead ends: 116 [2020-10-16 10:54:25,171 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 10:54:25,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:54:25,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 10:54:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-16 10:54:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:25,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:25,173 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:25,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:25,174 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:25,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:25,174 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:25,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:25,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:25,174 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:25,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-16 10:54:25,375 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:25,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:25,375 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-16 10:54:25,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:25,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212905640] [2020-10-16 10:54:25,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:25,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212905640] [2020-10-16 10:54:25,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789565732] [2020-10-16 10:54:25,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:25,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 10:54:25,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:25,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:25,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:25,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:25,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:25,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:25,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405000209] [2020-10-16 10:54:25,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:25,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:25,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:25,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:25,768 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:26,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:26,865 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-16 10:54:26,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:54:26,866 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:26,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:26,866 INFO L225 Difference]: With dead ends: 115 [2020-10-16 10:54:26,866 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 10:54:26,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 10:54:26,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 10:54:26,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-16 10:54:26,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:26,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:26,870 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:26,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:26,870 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:26,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:26,870 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:26,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:26,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:26,871 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:27,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:27,079 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:27,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:27,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-16 10:54:27,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:27,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557699300] [2020-10-16 10:54:27,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:27,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557699300] [2020-10-16 10:54:27,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895835520] [2020-10-16 10:54:27,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:27,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:27,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:27,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:27,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:27,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616000583] [2020-10-16 10:54:27,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:27,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:27,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:27,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:27,435 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:28,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:28,380 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-16 10:54:28,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 10:54:28,381 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:28,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:28,381 INFO L225 Difference]: With dead ends: 112 [2020-10-16 10:54:28,381 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 10:54:28,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 10:54:28,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 10:54:28,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-16 10:54:28,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:28,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:28,384 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:28,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:28,384 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:28,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:28,385 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:28,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:28,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:28,385 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:28,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-16 10:54:28,586 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:28,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:28,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-16 10:54:28,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:28,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092840011] [2020-10-16 10:54:28,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:28,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092840011] [2020-10-16 10:54:28,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810332374] [2020-10-16 10:54:28,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:28,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:28,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:28,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:28,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:28,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:28,965 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:28,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:28,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:28,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672618261] [2020-10-16 10:54:28,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:28,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:28,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:28,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:28,966 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:30,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:30,182 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-16 10:54:30,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 10:54:30,183 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:30,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:30,184 INFO L225 Difference]: With dead ends: 111 [2020-10-16 10:54:30,184 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 10:54:30,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 10:54:30,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 10:54:30,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-16 10:54:30,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:30,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:30,187 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:30,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:30,187 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:30,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:30,187 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:30,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:30,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:30,188 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:30,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-16 10:54:30,388 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:30,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:30,389 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-16 10:54:30,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:30,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865026051] [2020-10-16 10:54:30,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:30,664 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:30,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865026051] [2020-10-16 10:54:30,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928004627] [2020-10-16 10:54:30,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:30,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:54:30,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:30,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:30,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:30,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:30,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:30,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902575399] [2020-10-16 10:54:30,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:30,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:30,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:30,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:30,741 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:31,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:31,782 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-16 10:54:31,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:54:31,783 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:31,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:31,784 INFO L225 Difference]: With dead ends: 108 [2020-10-16 10:54:31,784 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 10:54:31,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 10:54:31,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 10:54:31,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-16 10:54:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:31,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:31,787 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:31,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:31,787 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:31,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:31,787 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:31,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:31,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:31,788 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:31,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:31,989 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:31,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:31,990 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-16 10:54:31,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:31,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354941990] [2020-10-16 10:54:31,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:32,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354941990] [2020-10-16 10:54:32,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521616247] [2020-10-16 10:54:32,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:32,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:32,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:32,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:32,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:32,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:32,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:32,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:32,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906327796] [2020-10-16 10:54:32,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:32,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:32,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:32,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:32,352 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:33,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:33,707 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-16 10:54:33,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 10:54:33,708 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:33,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:33,708 INFO L225 Difference]: With dead ends: 107 [2020-10-16 10:54:33,708 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 10:54:33,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 10:54:33,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 10:54:33,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-16 10:54:33,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:33,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:33,713 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:33,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:33,713 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:33,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:33,713 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:33,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:33,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:33,714 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:33,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:33,918 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:33,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:33,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-16 10:54:33,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:33,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756197360] [2020-10-16 10:54:33,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:34,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756197360] [2020-10-16 10:54:34,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286232433] [2020-10-16 10:54:34,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:34,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 10:54:34,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:34,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:34,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:34,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:34,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:34,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232751064] [2020-10-16 10:54:34,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:34,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:34,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:34,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:34,259 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:35,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:35,373 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-16 10:54:35,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 10:54:35,374 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:35,374 INFO L225 Difference]: With dead ends: 104 [2020-10-16 10:54:35,374 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 10:54:35,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 10:54:35,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 10:54:35,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-16 10:54:35,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:35,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:35,377 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:35,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:35,377 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:35,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:35,377 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:35,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:35,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:35,377 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:35,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:35,578 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:35,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:35,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-16 10:54:35,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:35,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578317628] [2020-10-16 10:54:35,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:35,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578317628] [2020-10-16 10:54:35,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807396099] [2020-10-16 10:54:35,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:35,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 10:54:35,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:35,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:35,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:35,945 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:35,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:35,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:35,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027531911] [2020-10-16 10:54:35,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:35,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:35,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:35,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:35,973 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:37,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:37,387 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-16 10:54:37,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 10:54:37,388 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:37,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:37,388 INFO L225 Difference]: With dead ends: 103 [2020-10-16 10:54:37,389 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 10:54:37,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 10:54:37,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 10:54:37,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-16 10:54:37,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:37,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:37,391 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:37,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:37,392 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:37,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:37,392 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:37,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:37,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:37,392 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:37,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-16 10:54:37,602 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:37,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:37,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-16 10:54:37,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:37,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997743814] [2020-10-16 10:54:37,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:37,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997743814] [2020-10-16 10:54:37,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263614542] [2020-10-16 10:54:37,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:37,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:37,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:37,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:37,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:37,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22255478] [2020-10-16 10:54:37,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:37,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:37,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:37,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:37,966 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:39,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:39,127 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-16 10:54:39,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 10:54:39,128 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:39,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:39,129 INFO L225 Difference]: With dead ends: 119 [2020-10-16 10:54:39,129 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 10:54:39,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 10:54:39,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 10:54:39,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-16 10:54:39,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-16 10:54:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-16 10:54:39,132 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-16 10:54:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:39,132 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-16 10:54:39,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:39,133 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-16 10:54:39,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:39,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:39,133 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:39,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:39,334 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:39,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:39,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-16 10:54:39,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:39,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969090189] [2020-10-16 10:54:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:39,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969090189] [2020-10-16 10:54:39,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096069403] [2020-10-16 10:54:39,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:39,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:39,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:39,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:39,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:39,691 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:39,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:39,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:39,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544534880] [2020-10-16 10:54:39,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:39,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:39,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:39,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:39,712 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-16 10:54:41,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:41,196 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-16 10:54:41,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 10:54:41,197 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:41,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:41,197 INFO L225 Difference]: With dead ends: 100 [2020-10-16 10:54:41,197 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 10:54:41,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 10:54:41,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 10:54:41,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-16 10:54:41,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 10:54:41,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-16 10:54:41,200 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-16 10:54:41,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:41,200 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-16 10:54:41,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:41,200 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-16 10:54:41,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:41,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:41,201 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:41,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:41,406 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:41,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:41,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-16 10:54:41,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:41,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307442279] [2020-10-16 10:54:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:41,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307442279] [2020-10-16 10:54:41,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644416064] [2020-10-16 10:54:41,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:41,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:54:41,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:41,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:41,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:41,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:54:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:41,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:41,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:41,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022192508] [2020-10-16 10:54:41,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:41,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:41,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:41,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:41,789 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-16 10:54:43,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:43,169 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-16 10:54:43,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 10:54:43,170 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:43,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:43,170 INFO L225 Difference]: With dead ends: 116 [2020-10-16 10:54:43,170 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 10:54:43,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 10:54:43,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 10:54:43,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-16 10:54:43,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 10:54:43,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-16 10:54:43,172 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-16 10:54:43,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:43,172 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-16 10:54:43,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:43,173 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-16 10:54:43,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:43,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:43,173 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:43,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:43,374 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:43,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:43,374 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-16 10:54:43,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:43,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385013855] [2020-10-16 10:54:43,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:43,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385013855] [2020-10-16 10:54:43,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769463394] [2020-10-16 10:54:43,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:43,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:43,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:43,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:43,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:43,757 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:54:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:43,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:43,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:43,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495680214] [2020-10-16 10:54:43,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:43,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:43,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:43,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:43,787 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-16 10:54:45,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:45,278 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-16 10:54:45,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 10:54:45,279 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:45,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:45,279 INFO L225 Difference]: With dead ends: 96 [2020-10-16 10:54:45,279 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 10:54:45,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 10:54:45,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 10:54:45,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-16 10:54:45,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 10:54:45,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-16 10:54:45,281 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-16 10:54:45,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:45,281 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-16 10:54:45,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:45,282 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-16 10:54:45,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:45,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:45,282 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:45,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:45,483 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:45,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:45,483 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-16 10:54:45,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:45,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175348030] [2020-10-16 10:54:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:45,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175348030] [2020-10-16 10:54:45,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123085181] [2020-10-16 10:54:45,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:45,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 10:54:45,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:45,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:45,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:45,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:45,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:45,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852006249] [2020-10-16 10:54:45,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:45,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:45,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:45,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:45,947 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-16 10:54:46,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:46,545 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-16 10:54:46,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:54:46,546 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:46,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:46,546 INFO L225 Difference]: With dead ends: 102 [2020-10-16 10:54:46,546 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 10:54:46,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:54:46,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 10:54:46,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-16 10:54:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:54:46,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-16 10:54:46,549 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-16 10:54:46,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:46,550 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-16 10:54:46,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:46,550 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-16 10:54:46,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:46,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:46,550 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:46,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-16 10:54:46,758 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:46,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:46,758 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-16 10:54:46,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:46,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911089383] [2020-10-16 10:54:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:47,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911089383] [2020-10-16 10:54:47,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518386681] [2020-10-16 10:54:47,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:47,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 10:54:47,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:47,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:47,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:47,231 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:47,243 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:47,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:47,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:47,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758794416] [2020-10-16 10:54:47,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:47,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:47,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:47,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:47,244 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-16 10:54:47,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:47,907 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-16 10:54:47,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:54:47,908 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:47,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:47,908 INFO L225 Difference]: With dead ends: 122 [2020-10-16 10:54:47,909 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 10:54:47,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:54:47,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 10:54:47,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-16 10:54:47,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 10:54:47,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-16 10:54:47,911 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-16 10:54:47,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:47,911 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-16 10:54:47,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:47,912 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-16 10:54:47,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:47,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:47,912 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:48,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-16 10:54:48,113 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:48,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:48,113 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-16 10:54:48,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:48,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653213055] [2020-10-16 10:54:48,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:48,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653213055] [2020-10-16 10:54:48,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523296538] [2020-10-16 10:54:48,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:48,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:48,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:48,569 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:48,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:48,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:48,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726209920] [2020-10-16 10:54:48,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:48,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:48,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:48,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:48,570 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-16 10:54:49,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:49,283 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-16 10:54:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:54:49,284 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:49,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:49,285 INFO L225 Difference]: With dead ends: 123 [2020-10-16 10:54:49,285 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 10:54:49,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:54:49,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 10:54:49,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-16 10:54:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:54:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-16 10:54:49,288 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-16 10:54:49,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:49,288 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-16 10:54:49,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:49,288 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-16 10:54:49,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:49,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:49,288 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:49,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-16 10:54:49,489 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:49,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:49,489 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-16 10:54:49,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:49,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325260740] [2020-10-16 10:54:49,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:49,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325260740] [2020-10-16 10:54:49,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325523687] [2020-10-16 10:54:49,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:49,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:49,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:49,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:49,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:49,965 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:49,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:49,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:49,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440876383] [2020-10-16 10:54:49,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:49,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:49,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:49,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:49,980 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-16 10:54:50,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:50,739 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-16 10:54:50,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:54:50,739 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:50,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:50,740 INFO L225 Difference]: With dead ends: 139 [2020-10-16 10:54:50,740 INFO L226 Difference]: Without dead ends: 133 [2020-10-16 10:54:50,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 10:54:50,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-16 10:54:50,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-16 10:54:50,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:54:50,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-16 10:54:50,747 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-16 10:54:50,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:50,747 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-16 10:54:50,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:50,747 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-16 10:54:50,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:50,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:50,747 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:50,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-16 10:54:50,948 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:50,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:50,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-16 10:54:50,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:50,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697387675] [2020-10-16 10:54:50,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:51,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697387675] [2020-10-16 10:54:51,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140996173] [2020-10-16 10:54:51,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:51,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 10:54:51,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:51,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:51,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:51,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:51,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:51,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441582276] [2020-10-16 10:54:51,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:51,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:51,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:51,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:51,378 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-16 10:54:52,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:52,204 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-16 10:54:52,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:54:52,206 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:52,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:52,206 INFO L225 Difference]: With dead ends: 139 [2020-10-16 10:54:52,206 INFO L226 Difference]: Without dead ends: 133 [2020-10-16 10:54:52,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:54:52,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-16 10:54:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-16 10:54:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 10:54:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-16 10:54:52,209 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-16 10:54:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:52,210 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-16 10:54:52,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:52,210 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-16 10:54:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:52,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:52,210 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:52,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:52,411 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:52,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:52,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-16 10:54:52,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:52,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137831891] [2020-10-16 10:54:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:52,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137831891] [2020-10-16 10:54:52,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977975711] [2020-10-16 10:54:52,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:52,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:52,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:52,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:52,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:52,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:52,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:52,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:52,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373446734] [2020-10-16 10:54:52,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:52,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:52,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:52,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:52,870 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-16 10:54:53,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:53,767 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-16 10:54:53,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:54:53,768 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:53,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:53,768 INFO L225 Difference]: With dead ends: 136 [2020-10-16 10:54:53,769 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 10:54:53,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:54:53,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 10:54:53,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-16 10:54:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 10:54:53,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-16 10:54:53,771 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-16 10:54:53,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:53,771 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-16 10:54:53,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:53,771 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-16 10:54:53,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:53,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:53,772 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:53,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-16 10:54:53,972 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:53,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:53,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-16 10:54:53,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:53,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029025123] [2020-10-16 10:54:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:54,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029025123] [2020-10-16 10:54:54,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089408497] [2020-10-16 10:54:54,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:54,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 10:54:54,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:54,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:54,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:54,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:54,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:54,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220145901] [2020-10-16 10:54:54,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:54,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:54,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:54,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:54,406 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-16 10:54:55,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:55,272 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-16 10:54:55,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:54:55,272 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:55,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:55,273 INFO L225 Difference]: With dead ends: 137 [2020-10-16 10:54:55,273 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 10:54:55,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 10:54:55,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 10:54:55,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-16 10:54:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 10:54:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-16 10:54:55,276 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-16 10:54:55,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:55,276 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-16 10:54:55,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:55,276 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-16 10:54:55,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:55,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:55,277 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:55,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:55,477 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:55,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:55,478 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-16 10:54:55,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:55,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887759764] [2020-10-16 10:54:55,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:55,828 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:55,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887759764] [2020-10-16 10:54:55,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529650213] [2020-10-16 10:54:55,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:55,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 10:54:55,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:55,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:55,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:55,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:55,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:55,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:55,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187401876] [2020-10-16 10:54:55,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:55,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:55,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:55,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:55,948 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-16 10:54:56,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:56,963 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-16 10:54:56,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:54:56,963 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:56,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:56,964 INFO L225 Difference]: With dead ends: 134 [2020-10-16 10:54:56,964 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 10:54:56,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 10:54:56,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 10:54:56,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-16 10:54:56,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 10:54:56,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-16 10:54:56,967 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-16 10:54:56,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:56,967 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-16 10:54:56,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:56,968 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-16 10:54:56,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:56,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:56,968 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:57,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-16 10:54:57,172 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:57,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:57,172 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-16 10:54:57,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:57,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882996428] [2020-10-16 10:54:57,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:57,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882996428] [2020-10-16 10:54:57,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963092337] [2020-10-16 10:54:57,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:57,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:57,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:57,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:57,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:57,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690942504] [2020-10-16 10:54:57,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:57,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:57,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:57,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:57,579 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-16 10:54:58,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:58,571 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-16 10:54:58,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 10:54:58,572 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:58,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:58,573 INFO L225 Difference]: With dead ends: 135 [2020-10-16 10:54:58,573 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 10:54:58,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 10:54:58,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 10:54:58,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-16 10:54:58,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:54:58,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-16 10:54:58,576 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-16 10:54:58,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:58,576 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-16 10:54:58,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:58,576 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-16 10:54:58,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:58,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:58,577 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:58,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:58,777 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:58,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:58,778 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-16 10:54:58,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:58,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741555652] [2020-10-16 10:54:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:59,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741555652] [2020-10-16 10:54:59,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868864124] [2020-10-16 10:54:59,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:59,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:59,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:59,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:59,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:59,181 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:59,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:59,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:59,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589569317] [2020-10-16 10:54:59,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:59,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:59,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:59,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:59,198 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-16 10:55:00,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:00,309 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-16 10:55:00,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:55:00,310 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:55:00,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:00,310 INFO L225 Difference]: With dead ends: 132 [2020-10-16 10:55:00,310 INFO L226 Difference]: Without dead ends: 126 [2020-10-16 10:55:00,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 10:55:00,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-16 10:55:00,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-16 10:55:00,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:55:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-16 10:55:00,312 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-16 10:55:00,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:00,313 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-16 10:55:00,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:00,313 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-16 10:55:00,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:00,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:00,313 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:00,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:00,514 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:00,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:00,515 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-16 10:55:00,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:00,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555412688] [2020-10-16 10:55:00,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:00,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555412688] [2020-10-16 10:55:00,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017967773] [2020-10-16 10:55:00,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:00,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 10:55:00,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:00,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:55:00,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:00,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:00,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:55:00,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470389346] [2020-10-16 10:55:00,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:55:00,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:00,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:55:00,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:55:00,928 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-16 10:55:01,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:01,941 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-16 10:55:01,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:55:01,942 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:55:01,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:01,943 INFO L225 Difference]: With dead ends: 133 [2020-10-16 10:55:01,943 INFO L226 Difference]: Without dead ends: 127 [2020-10-16 10:55:01,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 10:55:01,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-16 10:55:01,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-16 10:55:01,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 10:55:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-16 10:55:01,945 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-16 10:55:01,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:01,946 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-16 10:55:01,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:55:01,946 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-16 10:55:01,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:01,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:01,946 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:02,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:02,147 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:02,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:02,147 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-16 10:55:02,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:02,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822434519] [2020-10-16 10:55:02,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:02,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:02,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822434519] [2020-10-16 10:55:02,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456448315] [2020-10-16 10:55:02,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:02,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:55:02,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:02,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:55:02,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:02,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:02,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:02,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:55:02,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388137377] [2020-10-16 10:55:02,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:02,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:02,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:02,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:02,585 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-16 10:55:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:03,806 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-16 10:55:03,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 10:55:03,807 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:55:03,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:03,807 INFO L225 Difference]: With dead ends: 130 [2020-10-16 10:55:03,807 INFO L226 Difference]: Without dead ends: 124 [2020-10-16 10:55:03,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 10:55:03,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-16 10:55:03,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-16 10:55:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 10:55:03,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-16 10:55:03,811 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-16 10:55:03,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:03,811 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-16 10:55:03,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:03,811 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-16 10:55:03,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:03,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:03,812 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:04,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:04,019 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:04,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:04,019 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-16 10:55:04,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:04,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096897761] [2020-10-16 10:55:04,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:04,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:04,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096897761] [2020-10-16 10:55:04,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182374444] [2020-10-16 10:55:04,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:04,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 10:55:04,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:04,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:55:04,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:04,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:04,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:55:04,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915438298] [2020-10-16 10:55:04,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:55:04,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:04,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:55:04,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:55:04,421 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-16 10:55:05,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:05,531 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-16 10:55:05,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 10:55:05,532 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:55:05,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:05,532 INFO L225 Difference]: With dead ends: 131 [2020-10-16 10:55:05,532 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 10:55:05,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 10:55:05,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 10:55:05,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-16 10:55:05,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 10:55:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-16 10:55:05,535 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-16 10:55:05,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:05,535 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-16 10:55:05,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:55:05,535 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-16 10:55:05,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:05,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:05,536 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:05,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-16 10:55:05,737 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:05,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:05,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-16 10:55:05,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:05,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186364882] [2020-10-16 10:55:05,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:06,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186364882] [2020-10-16 10:55:06,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16572265] [2020-10-16 10:55:06,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:06,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 10:55:06,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:06,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:55:06,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:06,136 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:06,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:06,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:55:06,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381058650] [2020-10-16 10:55:06,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:06,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:06,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:06,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:06,158 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-16 10:55:07,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:07,493 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-16 10:55:07,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 10:55:07,494 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:55:07,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:07,494 INFO L225 Difference]: With dead ends: 128 [2020-10-16 10:55:07,494 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 10:55:07,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 10:55:07,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 10:55:07,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-16 10:55:07,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 10:55:07,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-16 10:55:07,497 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-16 10:55:07,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:07,497 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-16 10:55:07,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:07,497 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-16 10:55:07,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:07,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:07,498 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:07,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-16 10:55:07,698 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:07,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:07,699 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-16 10:55:07,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:07,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746761156] [2020-10-16 10:55:07,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:08,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746761156] [2020-10-16 10:55:08,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596679585] [2020-10-16 10:55:08,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:08,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:55:08,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:08,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:08,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:55:08,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127256920] [2020-10-16 10:55:08,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:55:08,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:08,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:55:08,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:55:08,084 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-16 10:55:09,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:09,293 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-16 10:55:09,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 10:55:09,293 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:55:09,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:09,294 INFO L225 Difference]: With dead ends: 129 [2020-10-16 10:55:09,294 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 10:55:09,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 10:55:09,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 10:55:09,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-16 10:55:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:55:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:55:09,296 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-16 10:55:09,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:09,297 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:55:09,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:55:09,297 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:55:09,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:09,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:09,297 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:09,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-16 10:55:09,498 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:09,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:09,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-16 10:55:09,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:09,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490355132] [2020-10-16 10:55:09,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:09,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490355132] [2020-10-16 10:55:09,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129080192] [2020-10-16 10:55:09,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:09,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:55:09,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:09,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:55:09,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:09,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:09,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:09,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:55:09,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208532104] [2020-10-16 10:55:09,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:09,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:09,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:09,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:09,911 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-16 10:55:11,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:11,383 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-16 10:55:11,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 10:55:11,384 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:55:11,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:11,385 INFO L225 Difference]: With dead ends: 126 [2020-10-16 10:55:11,385 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 10:55:11,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-16 10:55:11,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 10:55:11,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-16 10:55:11,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:55:11,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:55:11,387 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-16 10:55:11,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:11,388 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:55:11,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:11,388 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:55:11,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:11,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:11,388 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:11,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-16 10:55:11,594 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:11,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:11,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-16 10:55:11,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:11,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518493191] [2020-10-16 10:55:11,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:11,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518493191] [2020-10-16 10:55:11,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986209446] [2020-10-16 10:55:11,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:11,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 10:55:11,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:11,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:55:11,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:11,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:11,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:55:11,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249747683] [2020-10-16 10:55:11,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:55:11,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:11,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:55:11,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:55:11,988 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-16 10:55:13,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:13,291 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-16 10:55:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 10:55:13,292 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:55:13,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:13,292 INFO L225 Difference]: With dead ends: 127 [2020-10-16 10:55:13,292 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 10:55:13,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 10:55:13,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 10:55:13,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-16 10:55:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-16 10:55:13,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-16 10:55:13,294 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-16 10:55:13,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:13,294 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-16 10:55:13,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:55:13,294 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-16 10:55:13,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:13,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:13,295 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:13,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:13,495 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:13,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:13,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-16 10:55:13,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:13,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600829238] [2020-10-16 10:55:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:13,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600829238] [2020-10-16 10:55:13,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421981027] [2020-10-16 10:55:13,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:13,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:55:13,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:13,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:55:13,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:13,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:13,890 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:13,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:13,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:55:13,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635595107] [2020-10-16 10:55:13,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:13,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:13,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:13,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:13,892 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-16 10:55:15,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:15,453 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-16 10:55:15,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 10:55:15,453 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:55:15,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:15,454 INFO L225 Difference]: With dead ends: 124 [2020-10-16 10:55:15,454 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 10:55:15,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 10:55:15,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 10:55:15,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-16 10:55:15,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 10:55:15,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-16 10:55:15,456 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-16 10:55:15,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:15,456 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-16 10:55:15,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:15,457 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-16 10:55:15,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:15,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:15,457 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:15,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-16 10:55:15,658 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:15,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:15,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-16 10:55:15,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:15,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060467377] [2020-10-16 10:55:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:15,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060467377] [2020-10-16 10:55:15,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375492766] [2020-10-16 10:55:15,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:16,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 10:55:16,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:16,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:55:16,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:16,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:16,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:55:16,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222996825] [2020-10-16 10:55:16,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:55:16,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:16,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:55:16,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:55:16,037 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-16 10:55:17,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:17,381 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-16 10:55:17,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 10:55:17,382 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:55:17,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:17,382 INFO L225 Difference]: With dead ends: 144 [2020-10-16 10:55:17,382 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 10:55:17,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-16 10:55:17,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 10:55:17,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-16 10:55:17,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 10:55:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-16 10:55:17,386 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-16 10:55:17,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:17,386 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-16 10:55:17,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:55:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-16 10:55:17,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:17,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:17,387 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:17,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:17,596 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:17,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:17,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-16 10:55:17,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:17,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098272173] [2020-10-16 10:55:17,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:17,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098272173] [2020-10-16 10:55:17,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533114113] [2020-10-16 10:55:17,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:17,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 10:55:17,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:17,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:17,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:18,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:18,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:55:18,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283330903] [2020-10-16 10:55:18,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:18,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:18,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:18,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:18,004 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-16 10:55:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:19,568 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-16 10:55:19,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 10:55:19,569 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:55:19,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:19,569 INFO L225 Difference]: With dead ends: 125 [2020-10-16 10:55:19,569 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 10:55:19,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1106, Invalid=2800, Unknown=0, NotChecked=0, Total=3906 [2020-10-16 10:55:19,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 10:55:19,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-16 10:55:19,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-16 10:55:19,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-16 10:55:19,572 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-16 10:55:19,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:19,572 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-16 10:55:19,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:19,572 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-16 10:55:19,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:19,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:19,573 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:19,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-16 10:55:19,774 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:19,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:19,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-16 10:55:19,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:19,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461239044] [2020-10-16 10:55:19,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:20,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461239044] [2020-10-16 10:55:20,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134088834] [2020-10-16 10:55:20,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:20,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:20,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:20,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:20,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 10:55:20,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761840677] [2020-10-16 10:55:20,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:20,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:20,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:20,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:20,260 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-16 10:55:20,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:20,967 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-10-16 10:55:20,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:55:20,968 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 10:55:20,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:20,969 INFO L225 Difference]: With dead ends: 144 [2020-10-16 10:55:20,969 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 10:55:20,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:55:20,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 10:55:20,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-10-16 10:55:20,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 10:55:20,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 10:55:20,972 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 10:55:20,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:20,972 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 10:55:20,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:20,972 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 10:55:20,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:20,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:20,973 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:21,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:21,173 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:21,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:21,174 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-10-16 10:55:21,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:21,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322170710] [2020-10-16 10:55:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:21,636 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:21,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322170710] [2020-10-16 10:55:21,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649531965] [2020-10-16 10:55:21,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:21,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:55:21,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:21,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:21,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:21,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:21,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:21,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 10:55:21,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574722228] [2020-10-16 10:55:21,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 10:55:21,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:21,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 10:55:21,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:55:21,733 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 10:55:22,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:22,515 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-10-16 10:55:22,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:55:22,516 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 10:55:22,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:22,516 INFO L225 Difference]: With dead ends: 141 [2020-10-16 10:55:22,516 INFO L226 Difference]: Without dead ends: 135 [2020-10-16 10:55:22,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:55:22,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-16 10:55:22,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-10-16 10:55:22,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 10:55:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 10:55:22,519 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 10:55:22,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:22,520 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 10:55:22,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 10:55:22,520 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 10:55:22,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:22,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:22,520 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:22,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-10-16 10:55:22,721 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:22,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:22,721 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-10-16 10:55:22,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:22,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287963648] [2020-10-16 10:55:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:23,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287963648] [2020-10-16 10:55:23,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25566807] [2020-10-16 10:55:23,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:23,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 10:55:23,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:23,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:23,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:23,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:23,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 10:55:23,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493692719] [2020-10-16 10:55:23,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:23,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:23,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:23,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:23,217 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 10:55:24,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:24,062 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-10-16 10:55:24,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:55:24,063 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 10:55:24,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:24,063 INFO L225 Difference]: With dead ends: 138 [2020-10-16 10:55:24,063 INFO L226 Difference]: Without dead ends: 132 [2020-10-16 10:55:24,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 10:55:24,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-16 10:55:24,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-10-16 10:55:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 10:55:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 10:55:24,066 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 10:55:24,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:24,066 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 10:55:24,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:24,066 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 10:55:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:24,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:24,067 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:24,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:24,267 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:24,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:24,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-10-16 10:55:24,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:24,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181200605] [2020-10-16 10:55:24,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:24,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181200605] [2020-10-16 10:55:24,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771761684] [2020-10-16 10:55:24,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:24,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:55:24,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:24,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:24,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:24,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:24,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:24,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 10:55:24,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206337321] [2020-10-16 10:55:24,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 10:55:24,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:24,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 10:55:24,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:55:24,786 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 10:55:25,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:25,786 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-16 10:55:25,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:55:25,786 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 10:55:25,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:25,787 INFO L225 Difference]: With dead ends: 137 [2020-10-16 10:55:25,787 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 10:55:25,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 10:55:25,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 10:55:25,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-10-16 10:55:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 10:55:25,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 10:55:25,790 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 10:55:25,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:25,790 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 10:55:25,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 10:55:25,791 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 10:55:25,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:25,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:25,791 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:25,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-10-16 10:55:25,992 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:25,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:25,992 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-10-16 10:55:25,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:25,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404843586] [2020-10-16 10:55:25,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:26,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404843586] [2020-10-16 10:55:26,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710154822] [2020-10-16 10:55:26,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:26,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 10:55:26,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:26,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:26,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:26,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:26,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 10:55:26,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760019311] [2020-10-16 10:55:26,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:26,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:26,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:26,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:26,466 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 10:55:27,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:27,376 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-16 10:55:27,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:55:27,377 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 10:55:27,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:27,378 INFO L225 Difference]: With dead ends: 134 [2020-10-16 10:55:27,378 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 10:55:27,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:55:27,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 10:55:27,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-10-16 10:55:27,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 10:55:27,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 10:55:27,381 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 10:55:27,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:27,381 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 10:55:27,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:27,381 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 10:55:27,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:27,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:27,381 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:27,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-16 10:55:27,582 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:27,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:27,583 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-10-16 10:55:27,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:27,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535345967] [2020-10-16 10:55:27,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:28,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535345967] [2020-10-16 10:55:28,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403162181] [2020-10-16 10:55:28,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:28,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 10:55:28,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:28,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:28,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:28,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:28,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:28,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 10:55:28,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886511344] [2020-10-16 10:55:28,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 10:55:28,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:28,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 10:55:28,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:55:28,105 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 10:55:29,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:29,199 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-16 10:55:29,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:55:29,201 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 10:55:29,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:29,201 INFO L225 Difference]: With dead ends: 133 [2020-10-16 10:55:29,201 INFO L226 Difference]: Without dead ends: 127 [2020-10-16 10:55:29,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 10:55:29,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-16 10:55:29,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-10-16 10:55:29,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 10:55:29,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 10:55:29,205 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 10:55:29,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:29,205 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 10:55:29,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 10:55:29,205 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 10:55:29,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:29,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:29,206 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:29,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-16 10:55:29,410 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:29,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:29,410 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-10-16 10:55:29,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:29,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088739384] [2020-10-16 10:55:29,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:29,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088739384] [2020-10-16 10:55:29,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563222798] [2020-10-16 10:55:29,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:29,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:29,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:29,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:29,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 10:55:29,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990959945] [2020-10-16 10:55:29,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:29,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:29,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:29,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:29,880 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 10:55:30,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:30,873 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-10-16 10:55:30,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:55:30,873 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 10:55:30,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:30,874 INFO L225 Difference]: With dead ends: 130 [2020-10-16 10:55:30,874 INFO L226 Difference]: Without dead ends: 124 [2020-10-16 10:55:30,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 10:55:30,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-16 10:55:30,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-10-16 10:55:30,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 10:55:30,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 10:55:30,877 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 10:55:30,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:30,877 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 10:55:30,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:30,878 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 10:55:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:30,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:30,878 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:31,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:31,084 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:31,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:31,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-10-16 10:55:31,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:31,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916253997] [2020-10-16 10:55:31,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:31,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916253997] [2020-10-16 10:55:31,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425056182] [2020-10-16 10:55:31,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:31,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:55:31,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:31,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:31,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:31,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:31,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:31,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 10:55:31,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025133388] [2020-10-16 10:55:31,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 10:55:31,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:31,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 10:55:31,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:55:31,598 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 10:55:32,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:32,814 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-10-16 10:55:32,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:55:32,815 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 10:55:32,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:32,816 INFO L225 Difference]: With dead ends: 129 [2020-10-16 10:55:32,816 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 10:55:32,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 10:55:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 10:55:32,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-10-16 10:55:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 10:55:32,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 10:55:32,819 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 10:55:32,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:32,819 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 10:55:32,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 10:55:32,819 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 10:55:32,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:32,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:32,820 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:33,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-16 10:55:33,021 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:33,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:33,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-10-16 10:55:33,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:33,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310395838] [2020-10-16 10:55:33,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:33,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310395838] [2020-10-16 10:55:33,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460400796] [2020-10-16 10:55:33,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:33,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 10:55:33,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:33,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:33,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:33,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:33,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 10:55:33,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867218811] [2020-10-16 10:55:33,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:33,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:33,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:33,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:33,481 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 10:55:34,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:34,608 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-10-16 10:55:34,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 10:55:34,609 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 10:55:34,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:34,610 INFO L225 Difference]: With dead ends: 126 [2020-10-16 10:55:34,610 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 10:55:34,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 10:55:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 10:55:34,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-10-16 10:55:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 10:55:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 10:55:34,613 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 10:55:34,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:34,613 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 10:55:34,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:34,613 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 10:55:34,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:34,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:34,613 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:34,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:34,814 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:34,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:34,814 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-10-16 10:55:34,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:34,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950595028] [2020-10-16 10:55:34,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:35,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950595028] [2020-10-16 10:55:35,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996638512] [2020-10-16 10:55:35,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:35,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:55:35,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:35,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:35,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:35,278 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:35,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:35,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 10:55:35,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072416025] [2020-10-16 10:55:35,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 10:55:35,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:35,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 10:55:35,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:55:35,301 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 10:55:36,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:36,660 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-10-16 10:55:36,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 10:55:36,661 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 10:55:36,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:36,661 INFO L225 Difference]: With dead ends: 125 [2020-10-16 10:55:36,662 INFO L226 Difference]: Without dead ends: 119 [2020-10-16 10:55:36,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 10:55:36,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-16 10:55:36,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-10-16 10:55:36,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 10:55:36,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 10:55:36,664 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 10:55:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:36,665 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 10:55:36,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 10:55:36,665 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 10:55:36,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:36,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:36,665 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:36,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-10-16 10:55:36,867 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:36,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:36,868 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-10-16 10:55:36,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:36,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497125338] [2020-10-16 10:55:36,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:37,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497125338] [2020-10-16 10:55:37,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513530473] [2020-10-16 10:55:37,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:37,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 10:55:37,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:37,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:37,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:37,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:37,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 10:55:37,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898263656] [2020-10-16 10:55:37,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:37,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:37,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:37,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:37,306 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 10:55:38,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:38,494 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-10-16 10:55:38,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:55:38,495 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 10:55:38,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:38,495 INFO L225 Difference]: With dead ends: 122 [2020-10-16 10:55:38,496 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 10:55:38,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 10:55:38,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 10:55:38,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-10-16 10:55:38,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 10:55:38,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 10:55:38,498 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 10:55:38,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:38,498 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 10:55:38,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:38,498 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 10:55:38,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:38,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:38,499 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:38,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:38,700 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:38,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:38,700 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-10-16 10:55:38,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:38,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550521682] [2020-10-16 10:55:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:39,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550521682] [2020-10-16 10:55:39,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084554121] [2020-10-16 10:55:39,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:39,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 10:55:39,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:39,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:39,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:39,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:39,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:39,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 10:55:39,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810185625] [2020-10-16 10:55:39,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 10:55:39,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:39,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 10:55:39,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:55:39,172 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 10:55:40,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:40,648 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-10-16 10:55:40,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 10:55:40,649 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 10:55:40,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:40,649 INFO L225 Difference]: With dead ends: 121 [2020-10-16 10:55:40,650 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 10:55:40,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 10:55:40,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 10:55:40,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-10-16 10:55:40,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 10:55:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 10:55:40,652 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 10:55:40,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:40,653 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 10:55:40,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 10:55:40,653 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 10:55:40,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:40,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:40,653 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:40,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-10-16 10:55:40,854 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:40,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:40,855 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-10-16 10:55:40,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:40,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380087665] [2020-10-16 10:55:40,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:41,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380087665] [2020-10-16 10:55:41,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910211602] [2020-10-16 10:55:41,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:41,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:41,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:41,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:41,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 10:55:41,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787321328] [2020-10-16 10:55:41,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:41,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:41,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:41,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:41,286 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 10:55:42,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:42,565 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-10-16 10:55:42,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 10:55:42,567 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 10:55:42,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:42,567 INFO L225 Difference]: With dead ends: 118 [2020-10-16 10:55:42,567 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 10:55:42,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 10:55:42,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 10:55:42,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-10-16 10:55:42,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 10:55:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 10:55:42,570 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 10:55:42,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:42,570 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 10:55:42,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:42,571 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 10:55:42,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:42,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:42,571 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:42,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:42,778 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:42,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:42,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-10-16 10:55:42,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:42,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194108824] [2020-10-16 10:55:42,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:43,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194108824] [2020-10-16 10:55:43,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101289266] [2020-10-16 10:55:43,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:43,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:55:43,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:43,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:43,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:43,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:43,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:43,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 10:55:43,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192329945] [2020-10-16 10:55:43,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 10:55:43,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:43,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 10:55:43,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:55:43,238 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 10:55:44,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:44,875 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-10-16 10:55:44,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 10:55:44,876 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 10:55:44,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:44,876 INFO L225 Difference]: With dead ends: 117 [2020-10-16 10:55:44,876 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 10:55:44,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 10:55:44,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 10:55:44,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-10-16 10:55:44,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 10:55:44,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 10:55:44,879 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 10:55:44,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:44,880 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 10:55:44,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 10:55:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 10:55:44,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:44,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:44,880 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:45,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:45,081 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:45,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:45,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-10-16 10:55:45,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:45,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236875292] [2020-10-16 10:55:45,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:45,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236875292] [2020-10-16 10:55:45,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228163198] [2020-10-16 10:55:45,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:45,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 10:55:45,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:45,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:45,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:45,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:45,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 10:55:45,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197797309] [2020-10-16 10:55:45,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:45,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:45,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:45,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:45,521 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 10:55:46,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:46,894 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-10-16 10:55:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 10:55:46,896 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 10:55:46,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:46,896 INFO L225 Difference]: With dead ends: 114 [2020-10-16 10:55:46,896 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 10:55:46,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-16 10:55:46,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 10:55:46,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-10-16 10:55:46,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 10:55:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 10:55:46,899 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 10:55:46,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:46,899 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 10:55:46,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:46,899 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 10:55:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:46,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:46,899 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:47,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-16 10:55:47,100 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:47,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:47,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-10-16 10:55:47,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:47,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072178366] [2020-10-16 10:55:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:47,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072178366] [2020-10-16 10:55:47,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666399428] [2020-10-16 10:55:47,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true Received shutdown request... [2020-10-16 10:55:47,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:55:47,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:47,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:47,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:47,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-16 10:55:47,714 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 10:55:47,719 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 10:55:47,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 10:55:47 BasicIcfg [2020-10-16 10:55:47,719 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 10:55:47,721 INFO L168 Benchmark]: Toolchain (without parser) took 265641.49 ms. Allocated memory was 141.0 MB in the beginning and 198.2 MB in the end (delta: 57.1 MB). Free memory was 102.9 MB in the beginning and 139.5 MB in the end (delta: -36.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-10-16 10:55:47,721 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-16 10:55:47,722 INFO L168 Benchmark]: CACSL2BoogieTranslator took 678.15 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 102.7 MB in the beginning and 164.2 MB in the end (delta: -61.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-10-16 10:55:47,722 INFO L168 Benchmark]: Boogie Procedure Inliner took 79.07 ms. Allocated memory is still 205.0 MB. Free memory was 164.2 MB in the beginning and 162.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-16 10:55:47,723 INFO L168 Benchmark]: Boogie Preprocessor took 46.90 ms. Allocated memory is still 205.0 MB. Free memory was 162.2 MB in the beginning and 160.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-16 10:55:47,723 INFO L168 Benchmark]: RCFGBuilder took 457.48 ms. Allocated memory is still 205.0 MB. Free memory was 160.9 MB in the beginning and 140.3 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-10-16 10:55:47,723 INFO L168 Benchmark]: TraceAbstraction took 264373.34 ms. Allocated memory was 205.0 MB in the beginning and 198.2 MB in the end (delta: -6.8 MB). Free memory was 139.6 MB in the beginning and 139.5 MB in the end (delta: 147.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-16 10:55:47,727 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 678.15 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 102.7 MB in the beginning and 164.2 MB in the end (delta: -61.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 79.07 ms. Allocated memory is still 205.0 MB. Free memory was 164.2 MB in the beginning and 162.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 46.90 ms. Allocated memory is still 205.0 MB. Free memory was 162.2 MB in the beginning and 160.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 457.48 ms. Allocated memory is still 205.0 MB. Free memory was 160.9 MB in the beginning and 140.3 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 264373.34 ms. Allocated memory was 205.0 MB in the beginning and 198.2 MB in the end (delta: -6.8 MB). Free memory was 139.6 MB in the beginning and 139.5 MB in the end (delta: 147.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 618 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 10,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 264.2s, OverallIterations: 234, TraceHistogramMax: 10, AutomataDifference: 149.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 3718 SDtfs, 13035 SDslu, 24694 SDs, 0 SdLazy, 26606 SolverSat, 15333 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13038 GetRequests, 4297 SyntacticMatches, 228 SemanticMatches, 8513 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84768 ImplicationChecksByTransitivity, 154.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 233 MinimizatonAttempts, 5956 StatesRemovedByMinimization, 232 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 50.7s InterpolantComputationTime, 9794 NumberOfCodeBlocks, 9794 NumberOfCodeBlocksAsserted, 1215 NumberOfCheckSat, 9333 ConstructedInterpolants, 0 QuantifiedInterpolants, 915127 SizeOfPredicates, 3051 NumberOfNonLiveVariables, 29847 ConjunctsInSsa, 3970 ConjunctsInUnsatCore, 461 InterpolantComputations, 5 PerfectInterpolantSequences, 0/19950 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown